WO2008038556A1 - Precious metal recovering apparatus - Google Patents

Precious metal recovering apparatus Download PDF

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Publication number
WO2008038556A1
WO2008038556A1 PCT/JP2007/068231 JP2007068231W WO2008038556A1 WO 2008038556 A1 WO2008038556 A1 WO 2008038556A1 JP 2007068231 W JP2007068231 W JP 2007068231W WO 2008038556 A1 WO2008038556 A1 WO 2008038556A1
Authority
WO
WIPO (PCT)
Prior art keywords
combustion chamber
combustion
heating container
molten metal
metal recovery
Prior art date
Application number
PCT/JP2007/068231
Other languages
French (fr)
Japanese (ja)
Inventor
Tamio Okada
Tadao Sasaki
Katsuyuki Shirakawa
Long Yun Piao
Hideo Yoshikawa
Original Assignee
Nippon Crucible Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Crucible Co., Ltd. filed Critical Nippon Crucible Co., Ltd.
Publication of WO2008038556A1 publication Critical patent/WO2008038556A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • C22B11/02—Obtaining noble metals by dry processes
    • C22B11/021—Recovery of noble metals from waste materials
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • C22B11/02—Obtaining noble metals by dry processes
    • C22B11/021—Recovery of noble metals from waste materials
    • C22B11/025—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper, or baths
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • C22B7/003—Dry processes only remelting, e.g. of chips, borings, turnings; apparatus used therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/0806—Charging or discharging devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/10—Crucibles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/14—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/14—Arrangements of heating devices
    • F27B14/143—Heating of the crucible by convection of combustion gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/08—Screw feeders; Screw dischargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/14—Charging or discharging liquid or molten material
    • F27D3/145—Runners therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/50—Devolatilising; from soil, objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/20—Combustion to temperatures melting waste
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to a valuable metal recovery device for recovering valuable metals contained in an object to be treated such as waste.
  • Patent Document 1 a valuable metal recovery apparatus disclosed in Patent Document 1 is known.
  • the valuable metal recovery device 50 includes an apparatus main body 52 having a combustion chamber 51, a combustion pan 53 for supplying heated gas to the combustion chamber 51, and a combustion generated in the combustion chamber 51.
  • a flue (not shown) for discharging the gas to the outside and a heating container 54 accommodated in the combustion chamber 51 are provided.
  • the heating container 54 has an opening that can be freely opened and closed by a lid 55, and includes a communication portion 56 that communicates with the upper portion of the combustion chamber 51 with the lid 55 closed.
  • Patent Document 1 International Publication No. 2006/035570 Pamphlet
  • the valuable metal recovery apparatus 50 described above can burn the waste in the heating container 54 in a reducing atmosphere, it can suppress oxidation of the molten metal and efficiently recover the valuable metal. I can do it. However, in the case of waste with a relatively large specific surface area, such as aluminum chips and aluminum beverage cans, even if such valuable metal recovery equipment 50 is used, it is oxidized during the heat treatment to form oxide slag. In addition, there is a possibility that inclusions, mainly oxides, may be mixed in the dissolved material, so there is room for further improvement in terms of recovering high-quality aluminum with high yield and high efficiency.
  • an object of the present invention is to provide a valuable metal recovery device that can efficiently recover high-quality valuable metals.
  • the object of the present invention is a valuable metal recovery device for recovering a valuable metal contained in an object to be processed, the apparatus main body having a combustion chamber, and a combustion pan for supplying a heated gas to the combustion chamber. And a flue that discharges the combustion gas generated in the combustion chamber to the outside, and a heating container that is disposed in the combustion chamber and accommodates an object to be processed, the heating container having a bottom and an upper part. A communication portion having an opening that can be sealed and communicating with an upper portion of the combustion chamber is formed, and a charging device that continuously charges an object to be processed into the heating container through the opening; This is achieved by a valuable metal recovery device further comprising a stirring device for stirring the generated molten metal.
  • the stirring device includes a stirring blade that is immersed in the molten metal and generates a vortex in the molten metal by rotation, and the charging device is covered in the vortex. Arranged to drop the processed object!
  • the heating container includes a discharge passage whose lower portion communicates with the outside of the apparatus main body via a side wall of the combustion chamber, and through a molten metal discharge port formed at a tip of the discharge passage.
  • the molten metal can be discharged, and in this case, it is preferable that the molten metal discharge port is formed above the stirring blade!
  • the discharge channel may include an upper guide portion that is led out from a side wall of the container main body and extends upward while adjoining the side wall.
  • the molten metal discharge port is connected to the upper guide portion. It can be formed at the tip.
  • the discharge channel may be provided with a maintenance port that is formed below the molten metal discharge port and communicates with the vicinity of the bottom of the heating container.
  • the heating container can include a graphite crucible in which the discharge flow paths are integrated.
  • the heating container may include a cylindrical preheating tower that protrudes above the combustion chamber and seals the opening.
  • the charging device is provided in the preheating tower. Can do.
  • the preheating tower is arranged so as to be movable along the upper surface of the apparatus main body.
  • the stirring blade moves the preheating tower when moving the preheating tower. It is preferable to be able to retract upward so as not to interfere with the thermal container.
  • the input device can include a streak conveyor that conveys the workpiece.
  • the combustion chamber includes a first combustion chamber that houses the heating container and a second combustion that surrounds the first combustion chamber by disposing a partition wall therein. And a chamber.
  • the heating container communicates with the second combustion chamber via the communication portion, and the combustion burner is disposed at least in the first combustion chamber, and is configured as the first combustion chamber. So that the combustion gas generated in step 2 is discharged to the second combustion chamber through the combustion gas discharge unit, and is discharged to the outside through the flue gas in the second combustion chamber. Can be configured.
  • FIG. 1 is a cross-sectional view of a valuable metal recovery device according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a valuable metal recovery device according to another embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of a valuable metal recovery device according to still another embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of a conventional valuable metal recovery device.
  • FIG. 1 is a cross-sectional view of a valuable metal recovery device according to an embodiment of the present invention.
  • the valuable metal recovery device 1 includes a device main body 10, a combustion paner 20 and a flue 30 attached to the device main body 10.
  • the apparatus main body 10 is configured by lining a refractory material 12 on an iron casing 11, and a space surrounded by the refractory material 12 is a combustion chamber 13.
  • a combustion chamber 13 In the combustion chamber 13, an exhaust port 131 is formed in the lower part, and the flue 30 is connected to the exhaust port 131.
  • a support base 14 is installed on the floor surface of the combustion chamber 13, and a heating container 15 is placed on the support base 14.
  • An air supply port 132 for introducing combustion air from the outside is formed in the side wall of the combustion chamber 13.
  • the air supply port 132 is formed in three force points at substantially equal intervals along the circumferential direction with respect to the combustion chamber 13 having a circular shape in plan view, and is formed in three upper and lower stages at each point.
  • the flow rate of the air introduced from each air supply port 132 can be individually controlled by adjusting the opening degree of the valve 132a installed in the pipe connected to the air supply port 132.
  • the direction in which the combustion air is introduced from the air supply port 132 is a force that is substantially the same as the radial direction of the combustion chamber 13 in the present embodiment.
  • the air inlet 132 may be formed so that air is introduced along the tangential direction of the chamber 13.
  • the air introduced from the air supply port 132 is not limited to normal temperature, and is preheated by, for example, exchanging heat with the combustion gas exhausted through the exhaust port 131 or other waste heat. Air may be introduced. Further, the formation position and the number of the air supply openings 132 are limited to the present embodiment. It can be set as appropriate depending on the necessary air introduction amount. Further, when sufficient air can be introduced from the combustion burner 20 described later, the air supply port 132 is not necessarily provided.
  • the support base 14 is formed in a cylindrical shape, has a ventilation part 141 on a side wall, and supports the heating container 15 by having an end surface abutting against the bottom surface of the heating container 15.
  • the ventilation portion 141 is a groove portion force formed at four force locations at equal intervals on the upper and lower ends of the support base 14.
  • the heating container 15 has a bottom and has an opening 15a at the top, and is made of a material having good thermal conductivity.
  • the main part is made of a graphite crucible. Consists of a container body 151. Graphite crucibles are widely used in crucible furnaces for melting non-ferrous metals, mainly composed of scaly graphite and silicon carbide, having high thermal conductivity and excellent oxidation resistance, heat resistance and thermal shock resistance. Excellent durability in a wide temperature range from low to high.
  • One or more grooves are formed in the upper part of the container main body 151, and the upper end of the container main body 151 is connected to the lower surface of the disc-shaped holding body 152 via a cushioning material (not shown) such as ceramic fiber. By the contact, the groove functions as the communication portion 153.
  • the holding body 152 is detachably fixed to the upper surface of the apparatus main body 10, and the upper end surface of the portion protruding upward is a horizontal plane.
  • the size and number of the communication portion 153 are not particularly limited, but it is preferable that the number is preferably as small as possible so that dust or ash generated in the heating container 15 is not discharged. S is preferred.
  • a filter in the communication part 153 it is possible to reliably prevent the discharge of dust and ash.
  • the filter include a bata-like, felt-like, sheet-like, and mesh-like breathable member made of a ceramic fiber or the like.
  • baffle plates around the communication part 153 so that dust ash in the container body 151 does not scatter due to the flow of combustion gas generated in the combustion chamber 13. Also good.
  • the communication part 153 is preferably formed so as to communicate with the upper part of the combustion chamber, but its shape does not necessarily have to be a groove as in this embodiment.
  • a through hole formed in the side wall of the heating container 15 can be used as the communication portion 153.
  • a protrusion is provided on the lower surface of the holding body 152, and this protrusion is formed by contacting the upper end surface of the container body 151.
  • a gap between the protrusions may be used as the communication portion 153.
  • a gap formed between the upper end surface of the container main body 151 and the lower surface of the holding body 152 may be used as the communication portion 153.
  • Combustion burner 20 has a known configuration including a pilot burner that performs pre-combustion and a main burner that performs main combustion, and fuel supplied through fuel pipe 21 and combustion air supply pipe 22 respectively. By appropriately adjusting the flow rate (air ratio) of the combustion air, the combustion load and combustion temperature can be controlled.
  • the combustion pan 20 is provided at a lower position than the communication part 153 in the upper part of the combustion chamber 13 so that it is discharged from the exhaust port 131 while swirling around the generated combustion gas force heating vessel 15.
  • the heating container 15 is arranged in the tangential direction and slightly downward from the horizontal direction.
  • the arrangement of the combustion panner 20 and the exhaust port 131 is not necessarily limited to that of the present embodiment, but the combustion gas supplied from the combustion panner 20 to the combustion chamber 13 is sufficiently stirred in the combustion chamber 13, and It is preferable that the arrangement is such that a sufficient combustion time until exhaust from the exhaust port 131 can be secured. If necessary, a stirring plate may be installed inside the combustion chamber 13 to encourage stirring and mixing of the combustion gas.
  • the flue 30 is formed such that a pipe extending horizontally from the exhaust port 131 is bent and extends vertically upward. A part of the flue 30 has an enlarged diameter portion 31 having an enlarged cross-sectional area. Is formed. A second auxiliary capable of supplying combustion air from a pressurized air supply source (not shown) such as a blower between the exhaust port 131 and the enlarged diameter portion 31 (that is, upstream of the enlarged diameter portion 31). An air supply pipe 32 is provided. One or more air inlets 321, 21 are formed at the tip of the second auxiliary air supply pipe 32.
  • the combustion air can be supplied to the flue 30 at a desired flow rate.
  • a sealed opening / closing door 301 for cleaning is provided at the bent portion of the flue 30.
  • a plurality of baffle plates 311 are arranged in the up-down direction in the enlarged diameter portion 31, and are introduced from the combustion gas introduced from the exhaust port 131 and the second auxiliary air supply pipe 32. Combustion air is sufficiently mixed and stirred inside the enlarged diameter portion 31 and the residence time is secured! /.
  • the heating container 15 includes a preheating tower 40 having a cylindrical tower body 41.
  • the preheating tower 40 includes a roller 401 at the bottom, and is arranged along the upper surface of the apparatus main body 10. It is possible to move on the rail 402 placed in the drawing through direction.
  • the lower end of the tower body 41 can be tightly fixed to the upper end of the holding body 152 by a fixing means (not shown) in a state where the lower end is moved right above the holding body 152. Thereby, the preheating tower 40 seals the opening 15a of the heating container 15 in a state of protruding upward from the combustion chamber 13.
  • the preheating tower 40 includes an input device 42 for supplying waste containing valuable metals such as aluminum chips into the heating container 15, and an agitation device 44 for stirring the molten metal in the heating container 15. And a heat-resistant camera 46 for observing the combustion state in the heating container 15.
  • the charging device 42 includes a casing 421 provided so as to extend in a direction (horizontal direction) orthogonal to the side wall of the tower main body 41.
  • the casing 421 includes a hono 422 into which waste is charged and a screw conveyor 423 extending horizontally toward the center of the tower main body 41, and an open / close lid 422a is attached to the hopper 422.
  • the screw conveyor 423 has spiral screw blades 423a on its outer peripheral surface, and rotates by the operation of the electric motor 424, so that the processing object such as waste thrown in from the hopper 422 is directed toward the tower body 41. And then push it in.
  • a waste discharge port 425 is formed that is opened at a substantially middle position between the inner peripheral surface of the main body 41 and the central axis, and the transported waste is discharged from the waste discharge port. Drops into heating container 15 from 425. The rotation speed of the electric motor 424 can be adjusted, and the supply amount when the waste is continuously supplied into the heating container 15 can be controlled. In addition, a cooling water jacket 426 is provided around the casing 422, and the force S for cooling the waste in the casing 422 being conveyed is used.
  • the stirring device 44 is fixed to the tip of a shaft 441 made of a heat-resistant material such as stainless steel by screwing or the like with the stirring blade 442, and the base end side of the shaft 441 is preheated. It protrudes upward through a through-hole 40a formed in the upper part and is connected to an electric motor 443.
  • the stirring blade 442 is horizontally rotatable at the lower center in the container main body 151 by transmitting a driving force via the shaft 441 by the operation of the electric motor 443.
  • the shaft 441 is separable at the flange portion 441a, and a sealing fiber or the like is interposed between the shaft 441 and the through hole 40a, thereby maintaining an airtight state.
  • the shaft 4 41 can move up and down in the vertical direction, and when the preheating tower 40 is moved along the rail 402, In addition, the stirring blade 442 can be retracted upward so as not to interfere with the heating container 15.
  • the shape of the stirring blade 442 in this embodiment, a propeller blade is used, and by generating a vortex in the molten metal stored in the container main body 151, the waste that has fallen on the molten metal surface can be promptly removed.
  • the force S is configured to be entrained in the molten metal, and the shape of the blade that causes such an action.
  • a screw blade, a turbine blade, an anchor blade, a paddle blade, etc. are used. You can also.
  • the force with which the number of the stirring blades 442 is four is not particularly limited, and may be two or three, for example. In addition, this is particularly effective when the viscosity of the molten metal in which the stirring blades 442 are provided in a plurality of stages along the axial direction of the shaft 441 is high.
  • the heat-resistant camera 46 can use a CCD camera or the like, and is arranged so as to take an image of the inside of the heating container 15, and the remaining amount of waste in the heating container 15 and the generation of dissolved gas etc. You can check the situation.
  • a discharge channel 154 that is connected to the outside of the apparatus main body 10 through the side wall of the combustion chamber 13 and made of piping for discharging the molten metal to the outside is connected to the lower part of the container main body 151.
  • the discharge channel 154 includes a horizontal portion 155 that extends in the horizontal direction, and an upper guide portion 156 that branches from the horizontal portion 155 and guides the molten metal upward.
  • a maintenance port 155a and a molten metal discharge port 156a are formed at the front ends of the horizontal portion 155 and the upper guide portion 156, respectively, and the molten metal is externally supplied via the hot water discharge pipes 155b and 156b formed on the side wall of the apparatus body 10. It is possible to discharge S.
  • the hot water discharge pipes 155b and 156b are closed by heat insulating lids 155c and 156c, respectively, and during the heat treatment, the maintenance port 155a of the horizontal portion 155 is sealed with a tap 155d and corresponds to the upper guide portion 156.
  • the lid 156c By opening the lid 156c, the molten metal can be continuously discharged from the hot water discharge pipe 156b to the outside.
  • the molten metal discharge port 156a is formed above the stirring blade 442 in a state where the stirring blade 442 is disposed at the stirring position in the heating container 15.
  • the tap 155d is opened during maintenance of the heating container 15.
  • Each air supply port 132 of the combustion chamber 13 and the combustion air supply pipe 22 of the combustion burner 20 are each connected to a pressurized air supply source such as a factory air blower. These may be individually connected to multiple pressurized air sources or the same pressurized air. Even if it branches off from the supply source, it can be connected.
  • the valuable metal recovery device 1 of the present embodiment is a chip or shredded waste containing combustible waste such as oil, plastic, organic paint, rubber, cloth, paper, and wood (for example, aluminum with oil). Or wastes with a relatively large specific surface area, such as copper chips, sash scraps with plastic, cans, metal scrap, etc. It is suitable for recovering valuable metals such as zinc, tin and noble metals with a high yield.
  • the stirring blade 442 is retracted upward and the tower main body 41 is moved to open the upper portion of the container main body 151, and an ingot made of the same material as the valuable metal to be recovered is contained in the container main body 151.
  • the tower main body 41 is moved directly above the container main body 151 and sealed, and high temperature combustion gas is supplied from the combustion burner 20 to the combustion chamber 13, thereby melting the ingot in the container main body 151.
  • the temperature of the combustion chamber should be set appropriately in consideration of the melting temperature of the valuable metal to be recovered.For example, when the metal waste is an aluminum material such as an aluminum beverage can or aluminum chips, the temperature of the combustion chamber 13 Can be set to about 900 ° C.
  • the combustion is performed by on / off control of the main and pilot burners in the combustion burner 20 and by adjusting the opening of the valve 132a of the supply port 132. It can be set to the desired temperature by adjusting the volume and air ratio.
  • the stirring blade 442 is lowered and immersed in the molten metal to operate the stirring device 44, and the stirring blade 442 is rotated. .
  • the molten metal in the container body 151 is swirled by the rotation of the stirring blade 442 to generate a vortex.
  • the liquid level L of the molten metal is lifted at the portion in contact with the inner surface of the container body 151 as shown in the figure, so that the stored molten metal is guided to the outlet pipe 156b via the upper guide part 156 of the discharge channel 154.
  • the molten metal can be supplied to the outside by removing the lid 156c.
  • the molten metal discharge port 156a of the discharge channel 154 is formed above the stirring blade 442, the supply of the molten metal is stopped when the charging device 42 and the stirring device 44 are stopped. Therefore, supply of molten metal consisting of valuable metals and The stoppage can be linked to the operating state of the charging device 42 and the stirring device 44.
  • the inside of the discharge channel 154 is always filled with the molten metal, it is possible to prevent the unburned gas, etc. generated inside the heating vessel 15 from being discharged from the molten metal outlet 156a to the outside. Touch with S.
  • the screw conveyor 423 of the input device 42 is operated to input waste from the hopper 422.
  • the thrown-in waste is transported toward the tower main body 41 by the screw conveyor 423 and falls to the container main body 151 through the opening 15a. Since the opening 15a is hermetically sealed by the preheating tower 40, the combustion inside the container body 151 becomes anoxic or low-oxygen state due to the combustion of the waste that has fallen into the container body 151, and the combustion is performed in a reducing atmosphere. Is called.
  • the ventilation portion 141 is formed in the support base 14 that supports the container main body 151, the combustion gas contacts not only the side wall but also the bottom of the container main body 151, and the entire heating container 15 is It can be heated efficiently.
  • the container body 151 may be filled with a material that promotes carbonization, such as coconut or plastic, if necessary, so as to enhance the reducing atmosphere.
  • the pulverized waste that has fallen into the container main body 151 is quickly caught in the molten metal by the vortex generated by the rotation of the stirring blade 442, and is in a state of being submerged.
  • valuable metals in the waste melt without coming into contact with the outside air, so it is possible to more reliably prevent oxidation of valuable metals.
  • Combustible waste such as oil, paints and plastics other than valuable metals are released in the form of gas by thermal decomposition.
  • the charging device 42 is arranged to disperse and drop the processing object into the vortex generated by the rotation of the stirring blade 442 so that the processing object can enter the molten metal as quickly as possible! / I prefer to do that!
  • the waste discharge port 425 is formed at a substantially intermediate position between the inner peripheral surface of the tower body 41 and the central axis, and the object to be treated can be distributed substantially uniformly on the molten metal surface in the vortex. it can.
  • the surface of the molten metal may be configured to be quickly submerged into the melt by the lower surface of the guide plate!
  • the combustion chamber 13 Since the combustion chamber 13 has a negative pressure due to the high-temperature combustion gas rising up the flue 30 through the exhaust port 131, water vapor generated from waste due to heating of the heating container 15 and organic Unburned gas such as a system material is led out from the communication part 153 to the combustion chamber 13. This unburned gas is burned in the combustion chamber 13 to become a combustion gas, and is discharged from the exhaust port 131 together with the combustion gas of the combustion pan 20.
  • the combustion burner 20 is disposed above the exhaust port 131, and the combustion gas injected from the combustion burner 20 swirls along the wall surface of the combustion chamber 13. It is possible to sufficiently stir in 13 and to ensure a sufficient combustion time of unburned gas in the combustion chamber 13. As a result, complete combustion of the unburned gas in the combustion chamber 13 can be promoted, the exhaust can be maintained in a clean state, and emission of smoke, odor, dust ash and the like can be prevented.
  • combustion air can be introduced into the combustion chamber 13 from the air supply port 132, when the amount of air introduced into the combustion chamber 13 from the combustion partner 20 is insufficient, This shortage can be compensated to ensure complete combustion in the combustion chamber 13.
  • the temperature of the combustion gas supplied from the combustion pan 20 is preferably 800 ° C or higher from the viewpoint of promoting complete combustion of unburned gas and dioxins, etc. preferable.
  • the upper limit of the combustion temperature is determined in consideration of the heat resistance of the material used, but for example, when using a graphite crucible as in this embodiment, it can be used at a high temperature of about 1500 ° C. .
  • the combustion amount of the combustion burner 20 can be reduced.
  • the main burner of the combustion burner 20 may be stopped and only the pilot burner may be burned, or the fuel supply to the combustion burner 20 is stopped and only air at normal temperature is supplied from the combustion burner 20 You may do it.
  • the opening degree of the valve 132a of the air supply port 132 can be adjusted to control the inside of the combustion chamber 13 to have an optimum air-fuel ratio.
  • waste containing materials with high calorific values such as PET resin and chlorinated resin, large self-combustion heat can be obtained.
  • the fuel consumption can be reduced and the high-temperature exhaust gas discharged from the discharge port 131 can be effectively used for boilers and drying.
  • the valuable metal recovery device of the present embodiment can effectively recover the combustion heat of combustible waste, which can recover valuable metals from waste efficiently, and can be applied by creating thermal energy. is there.
  • the gas introduced into the combustion chamber 13 from the air supply port 132 may be other combustion-supporting gas such as oxygen in addition to air, thereby promoting complete combustion in the combustion chamber 13. It is possible
  • the valuable metal recovery device 1 of the present embodiment reliably prevents oxidation of the molten metal by quickly submerging the continuously charged waste into the molten metal in the heating vessel 15 capable of reducing combustion. This is characterized in that high-quality valuable metals can be recovered. Therefore, in order to obtain a large treatment capacity, it is preferable to entrap as much waste as possible in the molten metal in a short time without depositing it on the molten metal surface. For this purpose, it is preferable to increase the swirl speed of the molten metal by the rotation of the stirring blade 442 and to increase the inner diameter of the container main body 151.
  • a container body 151 with an inner diameter of about 400 to 1200 mm is used, and the swirl speed of the melt is about 3 at the fastest outermost circumference. What is necessary is just to set the rotational speed of the stirring blade 442 so that it may be set to -30m / sec. In order to realize such rotation of the stirring blade 442, it is preferable to use a variable rotary stirring propeller device that can rotate at a rotational speed of about 100 to 500 rpm. Increasing the inner diameter of the container main body 151 is also preferable from the viewpoint of enabling stable continuous melting treatment because the molten metal storage amount is increased and the molten metal temperature is easily maintained.
  • the valuable metal recovery apparatus 1 of the present embodiment melts the waste thrown into the heating container 15 into the molten metal. Therefore, in order to recover high-quality valuable metal at a high yield, the heating container 15
  • the structure which can fully heat is preferable. Therefore, as shown in FIG. 2, by disposing a partition wall 1302 inside the combustion chamber 1301, the combustion chamber 1301 surrounds the first combustion chamber 1303 that houses the heating container 15 and the first combustion chamber 1303.
  • a double structure including the second combustion chamber 1304 may be used.
  • the same components as those shown in FIG. 1 are denoted by the same reference numerals.
  • a gap is formed between the upper end of the partition wall 1302 and the lower surface of the holding body 152.
  • a ring-shaped flange portion 1511 is fixed to the upper end of the container main body 151, and an outer edge portion of the flange portion 1511 extends to the second combustion chamber 1304 via the gap.
  • a communication portion 1531 that connects the inside of the heating container 15 and the second combustion chamber 1304 is formed between the flange portion 1511 and the holding body 152.
  • the communication portion 1531 directly communicates with the second combustion chamber 1304 without passing through the first combustion chamber 1303, and a ring-shaped filter 1531a is disposed so as to be replaceable.
  • a first combustion burner 201 is disposed below the first combustion chamber 1303, and a second combustion burner 202 is disposed above the second combustion chamber 1304.
  • the configuration of the first combustion burner 201 and the second combustion burner 202 is the same as that of the combustion burner 20 shown in FIG.
  • Combustion gas generated in the first combustion chamber 1303 by the first combustion burner 201 enters the second combustion chamber 1304 via a combustion gas discharge portion 1305 formed between the flange portion 1511 and the upper end of the partition wall 1302. Discharged.
  • a plurality of spacers 1306 are disposed along the circumferential direction between the first combustion chamber 1303 and the second combustion chamber 1304, and the interior of the second combustion chamber 1304 is maintained at a predetermined size. Yes.
  • the unburned gas generated in the heating container 15 is not supplied, and the combustion is not necessarily completed. Therefore, the heating efficiency of the container main body 151 by the first combustion burner 201 can be increased, and the molten metal can be maintained at a high temperature.
  • the unburned gas force S generated in the heating container 15 merges with the combustion gas generated in the first combustion chamber 1303, and is supplied from the air inlet 132 as necessary. Mixing with air promotes complete combustion. Therefore, it is possible to improve the combustion efficiency and achieve clean combustion while maintaining good heating efficiency for the molten metal in the heating container 15.
  • the total of the volume of the first combustion chamber 1303 and the volume of the second combustion chamber 1304 is the same as the volume of the combustion chamber 13 shown in FIG.
  • the second combustion chamber 202 disposed in the second combustion chamber 1304 is not necessarily required, and only the first combustion chamber 1303 is not required. It is also possible to have a configuration with 201.
  • a plurality of input devices 42 may be provided for the tower main body 41. For example, by disposing a plurality of input devices 42 in a radiating manner from the center of the tower main body 41, it becomes easy to uniformly disperse the waste into the vortex of the container main body 151.
  • the charging device 42 instead of providing the charging device 42 on the side wall of the tower body 41, it may be arranged so that the workpiece falls from the top of the tower body 41! /.
  • a pulverizer may be connected to the hopper 422 of the charging device 42 so that the object to be processed is previously pulverized by the pulverizing device and then charged into the charging device 42.
  • the charging device 42 may appropriately arrange a fixed blade or a rotary blade in the casing 421 in order to promote the pulverization of the waste being conveyed by the screw conveyor 423.
  • the specific configuration of the charging device 42 is not limited to that of the present embodiment, and is capable of dropping an object to be treated such as waste in the vortex of the molten metal generated in the heating container 15.
  • other configurations may be used.
  • a container main body 151 made of a graphite crucible and a discharge flow path 154 also having a heat resistant material force such as a graphite crucible material are integrated.
  • a deformed graphite crucible can be used.
  • the container main body in which the upper guide part 1561 constituting the discharge flow path 1541 integrated with the container main body 151 is not branched from the horizontal part 155.
  • the molten metal may be discharged through a hot water outlet 1562 formed in the middle of the upper guide portion 1561 so as to be guided from the side wall of 151 and extend upward while adjoining the side wall.
  • the temperature of the molten metal discharged from the outlet pipe 156b can be maintained at a high temperature. it can.
  • the container body 151 is composed of a graphite crucible.
  • the melting temperature is low, such as zinc or a low melting point aluminum alloy material, and the metal waste is melted.
  • a container body 151 made of an iron container that is inexpensive and has good thermal conductivity.
  • a container made of a metal other than refractory ceramics or iron can be used as the container body 151.

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Abstract

Provided is a precious metal recovering apparatus (1) for recovering precious metals contained in a treatment object. The precious metal recovering apparatus (1) comprises an apparatus body (10) having a combustion chamber (13), a combustion burner (20) for feeding a heating gas to the combustion chamber (13), a flue (30) for discharging the combustion gas produced in the combustion chamber (13), to the outside, and a heating container (15) arranged in the combustion chamber (13) for containing the treatment object. The heating container (15) includes a bottomed opening (15a) made upwardly sealable, and a communication portion (153) communicating with the upper portion of the combustion chamber (13). Further comprised are a pouring device (42) for pouring the treatment object continuously through the opening (15a) into the heating container (15), and an agitating device (44) for agitating the molten metal produced in the heating container (15). The precious metal recovering apparatus can recover the precious metals of high qualities highly efficiently.

Description

明 細 書  Specification
有価金属回収装置  Valuable metal recovery equipment
技術分野  Technical field
[0001] 本発明は、廃棄物等の被処理物に含まれる有価金属を回収するための有価金属 回収装置に関する。  [0001] The present invention relates to a valuable metal recovery device for recovering valuable metals contained in an object to be treated such as waste.
背景技術  Background art
[0002] 近年の産業廃棄物等の増加に伴い、貴金属、銅、アルミニウムのような有価金属を 高品位且つ高歩留まりで回収することが求められている。廃棄物中に含まれる有価 金属を効率良く回収することができる装置として、例えば、特許文献 1に開示された 有価金属回収装置が知られている。  [0002] With the recent increase in industrial waste and the like, it is required to recover valuable metals such as precious metals, copper, and aluminum with high quality and high yield. As an apparatus that can efficiently recover valuable metals contained in waste, for example, a valuable metal recovery apparatus disclosed in Patent Document 1 is known.
[0003] この有価金属回収装置 50は、図 4に示すように、燃焼室 51を有する装置本体 52と 、燃焼室 51に加熱気体を供給する燃焼パーナ 53と、燃焼室 51で生成された燃焼ガ スを外部に排出する煙道（図示せず）と、燃焼室 51に収容される加熱容器 54とを備 える。加熱容器 54は、開口が蓋体 55により開閉自在とされており、蓋体 55を閉じた 状態で燃焼室 51の上部と連通する連通部 56を備えている。  As shown in FIG. 4, the valuable metal recovery device 50 includes an apparatus main body 52 having a combustion chamber 51, a combustion pan 53 for supplying heated gas to the combustion chamber 51, and a combustion generated in the combustion chamber 51. A flue (not shown) for discharging the gas to the outside and a heating container 54 accommodated in the combustion chamber 51 are provided. The heating container 54 has an opening that can be freely opened and closed by a lid 55, and includes a communication portion 56 that communicates with the upper portion of the combustion chamber 51 with the lid 55 closed.
特許文献 1：国際公開第 2006/035570号パンフレット  Patent Document 1: International Publication No. 2006/035570 Pamphlet
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0004] 上述した有価金属回収装置 50は、加熱容器 54内の廃棄物を還元雰囲気で燃焼 すること力 Sできるので、溶融する金属の酸化を抑制することができ、有価金属を効率 よく回収すること力できる。ところ力 アルミ切粉やアルミ飲料缶など比表面積が比較 的大きい廃棄物の場合には、このような有価金属回収装置 50を使用しても、加熱処 理中に酸化して酸化物スラグを形成したり、溶解物中に酸化物を中心とする介在物 が混入するおそれがあつたため、高品質のアルミニウムを高歩留まり '高効率で回収 する点から更に改良の余地があった。  [0004] Since the valuable metal recovery apparatus 50 described above can burn the waste in the heating container 54 in a reducing atmosphere, it can suppress oxidation of the molten metal and efficiently recover the valuable metal. I can do it. However, in the case of waste with a relatively large specific surface area, such as aluminum chips and aluminum beverage cans, even if such valuable metal recovery equipment 50 is used, it is oxidized during the heat treatment to form oxide slag. In addition, there is a possibility that inclusions, mainly oxides, may be mixed in the dissolved material, so there is room for further improvement in terms of recovering high-quality aluminum with high yield and high efficiency.
[0005] そこで、本発明は、高品質の有価金属を効率良く回収することができる有価金属回 収装置の提供を目的とする。 課題を解決するための手段 [0005] Therefore, an object of the present invention is to provide a valuable metal recovery device that can efficiently recover high-quality valuable metals. Means for solving the problem
[0006] 本発明の前記目的は、被処理物に含まれる有価金属を回収するための有価金属 回収装置であって、燃焼室を有する装置本体と、前記燃焼室に加熱気体を供給する 燃焼パーナと、前記燃焼室で生成された燃焼ガスを外部に排出する煙道と、前記燃 焼室内に配置され、被処理物を収容する加熱容器とを備え、前記加熱容器は、有底 で上部に密閉可能な開口を有し、前記燃焼室の上部と連通する連通部が形成され ており、前記加熱容器内に前記開口を介して被処理物を連続投入する投入装置と、 前記加熱容器内で生成された溶湯を攪拌する攪拌装置とを更に備える有価金属回 収装置により達成される。  The object of the present invention is a valuable metal recovery device for recovering a valuable metal contained in an object to be processed, the apparatus main body having a combustion chamber, and a combustion pan for supplying a heated gas to the combustion chamber. And a flue that discharges the combustion gas generated in the combustion chamber to the outside, and a heating container that is disposed in the combustion chamber and accommodates an object to be processed, the heating container having a bottom and an upper part. A communication portion having an opening that can be sealed and communicating with an upper portion of the combustion chamber is formed, and a charging device that continuously charges an object to be processed into the heating container through the opening; This is achieved by a valuable metal recovery device further comprising a stirring device for stirring the generated molten metal.
[0007] この有価金属回収装置において、前記攪拌装置は、溶湯内に浸漬されて回転によ り溶湯に渦流を生じさせる攪拌羽根を備えることが好ましぐ前記投入装置は、前記 渦流内に被処理物を落下させるように配置されて!/、ること力 S好ましレ、。  [0007] In this valuable metal recovery device, it is preferable that the stirring device includes a stirring blade that is immersed in the molten metal and generates a vortex in the molten metal by rotation, and the charging device is covered in the vortex. Arranged to drop the processed object!
[0008] また、前記加熱容器は、下部が前記燃焼室の側壁を介して前記装置本体の外部と 連通する排出流路を備え、該排出流路の先端に形成された溶湯排出口を介して溶 湯を排出可能に構成することができ、この場合、前記溶湯排出口は、前記攪拌羽根 よりも上方に形成されてレ、ることが好まし!/、。  [0008] In addition, the heating container includes a discharge passage whose lower portion communicates with the outside of the apparatus main body via a side wall of the combustion chamber, and through a molten metal discharge port formed at a tip of the discharge passage. The molten metal can be discharged, and in this case, it is preferable that the molten metal discharge port is formed above the stirring blade!
[0009] 前記排出流路は、前記容器本体の側壁から導出され、該側壁に隣接しながら上方 に延びる上方案内部を備えることができ、この場合、前記溶湯排出口は、前記上方 案内部の先端に形成してもよレ、。  [0009] The discharge channel may include an upper guide portion that is led out from a side wall of the container main body and extends upward while adjoining the side wall. In this case, the molten metal discharge port is connected to the upper guide portion. It can be formed at the tip.
[0010] また、前記排出流路は、前記溶湯排出口よりも下方に形成され、前記加熱容器の 底部近傍と連通するメンテナンス口を備えることができる。  [0010] Further, the discharge channel may be provided with a maintenance port that is formed below the molten metal discharge port and communicates with the vicinity of the bottom of the heating container.
[0011] これらの排出流路を備える有価金属回収装置において、前記加熱容器は、前記排 出流路が一体化された黒鉛坩堝を含むように構成することができる。  [0011] In the valuable metal recovery apparatus including these discharge flow paths, the heating container can include a graphite crucible in which the discharge flow paths are integrated.
[0012] また、前記加熱容器は、前記燃焼室の上方に突出し、前記開口を密閉する筒状の 予熱タワーを備えることが可能であり、この場合、前記投入装置は、前記予熱タワー に設けることができる。  [0012] The heating container may include a cylindrical preheating tower that protrudes above the combustion chamber and seals the opening. In this case, the charging device is provided in the preheating tower. Can do.
[0013] 前記予熱タワーは、前記装置本体の上面に沿って移動可能に配置されていること が好ましぐこの場合、前記攪拌羽根は、前記予熱タワーを移動させる際に、前記加 熱容器と干渉しないように上方に待避可能であることが好ましい。 [0013] It is preferable that the preheating tower is arranged so as to be movable along the upper surface of the apparatus main body. In this case, the stirring blade moves the preheating tower when moving the preheating tower. It is preferable to be able to retract upward so as not to interfere with the thermal container.
[0014] 上述した各有価金属回収装置において、前記投入装置は、被処理物を搬送するス タリユーコンベアを備えることができる。 [0014] In each of the valuable metal recovery devices described above, the input device can include a streak conveyor that conveys the workpiece.
[0015] また、上述した各有価金属回収装置において、前記燃焼室は、内部に隔壁を配置 することにより、前記加熱容器を収容する第 1燃焼室と、該第 1燃焼室を取り囲む第 2 燃焼室とを備える構成にすることができる。この場合、前記加熱容器は、前記連通部 を介して前記第 2燃焼室と連通しており、前記燃焼パーナは、少なくとも前記第 1燃 焼室に配置されている構成として、前記第 1燃焼室で生成された燃焼ガスが、燃焼ガ ス排出部を介して前記第 2燃焼室に排出され、前記第 2燃焼室で生成された燃焼ガ スカ 前記煙道を介して外部に排出されるように構成することができる。 [0015] Further, in each of the valuable metal recovery devices described above, the combustion chamber includes a first combustion chamber that houses the heating container and a second combustion that surrounds the first combustion chamber by disposing a partition wall therein. And a chamber. In this case, the heating container communicates with the second combustion chamber via the communication portion, and the combustion burner is disposed at least in the first combustion chamber, and is configured as the first combustion chamber. So that the combustion gas generated in step 2 is discharged to the second combustion chamber through the combustion gas discharge unit, and is discharged to the outside through the flue gas in the second combustion chamber. Can be configured.
発明の効果  The invention's effect
[0016] 本発明の有価金属回収装置によれば、高品質の有価金属を効率良く回収すること ができる。  [0016] According to the valuable metal recovery device of the present invention, high-quality valuable metals can be efficiently recovered.
図面の簡単な説明  Brief Description of Drawings
[0017] [図 1]本発明の一実施形態に係る有価金属回収装置の断面図である。  FIG. 1 is a cross-sectional view of a valuable metal recovery device according to an embodiment of the present invention.
[図 2]本発明の他の実施形態に係る有価金属回収装置の断面図である。  FIG. 2 is a cross-sectional view of a valuable metal recovery device according to another embodiment of the present invention.
[図 3]本発明の更に他の実施形態に係る有価金属回収装置の断面図である。  FIG. 3 is a cross-sectional view of a valuable metal recovery device according to still another embodiment of the present invention.
[図 4]従来の有価金属回収装置の断面図である。  FIG. 4 is a cross-sectional view of a conventional valuable metal recovery device.
符号の説明  Explanation of symbols
[0018] 1 有価金属回収装置 [0018] 1 Valuable metal recovery device
10 装置本体  10 Main unit
13 燃焼室  13 Combustion chamber
15 加熱容器  15 Heating vessel
15a 開口  15a opening
153 連通部  153 Communication part
154 排出流路  154 Discharge flow path
155a メンテナンス口  155a Maintenance port
156a 溶湯排出口 20 燃焼パーナ 156a Melt outlet 20 Burning panner
30 煙道  30 flues
40 予熱タワー  40 Preheating tower
42 投入装置  42 Dosing device
423 スクリューコンベア  423 Screw conveyor
44 撹拌装置  44 Stirrer
442 撹拌羽根  442 Stirrer blade
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0019] 以下、本発明の実態形態について添付図面を参照して説明する。図 1は、本発明 の一実施形態に係る有価金属回収装置の断面図である。  [0019] Hereinafter, actual forms of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a valuable metal recovery device according to an embodiment of the present invention.
[0020] 図 1に示すように、有価金属回収装置 1は、装置本体 10と、この装置本体 10に取り 付けられた燃焼パーナ 20及び煙道 30とを備えている。  As shown in FIG. 1, the valuable metal recovery device 1 includes a device main body 10, a combustion paner 20 and a flue 30 attached to the device main body 10.
[0021] 装置本体 10は、鉄製のケーシング 11に耐火材 12が内張りされて構成されており、 この耐火材 12で囲まれた空間が燃焼室 13となっている。燃焼室 13は、下部に排気 口 131が形成されており、この排気口 131に煙道 30が接続される。  The apparatus main body 10 is configured by lining a refractory material 12 on an iron casing 11, and a space surrounded by the refractory material 12 is a combustion chamber 13. In the combustion chamber 13, an exhaust port 131 is formed in the lower part, and the flue 30 is connected to the exhaust port 131.
[0022] 燃焼室 13の床面には支持台 14が設置されており、この支持台 14に加熱容器 15 が載置されている。燃焼室 13の側壁には、外部から燃焼用空気を導入するための給 気口 132が形成されている。給気口 132は、本実施形態においては、平面視円形状 の燃焼室 13に対し周方向に沿って略等間隔に 3力所形成され、且つ、それぞれの箇 所において上下 3段に形成されており、各給気口 132から導入される空気の流量は 、給気口 132に接続されるパイプに設置されたバルブ 132aの開度調整により個別に 制御可能である。給気口 132からの燃焼用空気の導入方向は、本実施形態におい ては燃焼室 13の径方向に略一致させている力 燃焼室 13の内部で旋回流が生じ易 くするために、燃焼室 13の接線方向に沿って空気が導入されるように、給気口 132 を形成してもよい。  A support base 14 is installed on the floor surface of the combustion chamber 13, and a heating container 15 is placed on the support base 14. An air supply port 132 for introducing combustion air from the outside is formed in the side wall of the combustion chamber 13. In the present embodiment, the air supply port 132 is formed in three force points at substantially equal intervals along the circumferential direction with respect to the combustion chamber 13 having a circular shape in plan view, and is formed in three upper and lower stages at each point. The flow rate of the air introduced from each air supply port 132 can be individually controlled by adjusting the opening degree of the valve 132a installed in the pipe connected to the air supply port 132. The direction in which the combustion air is introduced from the air supply port 132 is a force that is substantially the same as the radial direction of the combustion chamber 13 in the present embodiment. The air inlet 132 may be formed so that air is introduced along the tangential direction of the chamber 13.
[0023] 給気口 132から導入される空気は、常温のものに限られず、例えば、排気口 131を 介して排出される燃焼ガスや他の廃熱と熱交換する等して、予め加熱した空気を導 入してもよい。また、給気口 132の形成位置や個数などは本実施形態に限定される ものではなぐ必要な空気導入量などによって適宜設定可能である。更に、後述する 燃焼パーナ 20から十分な空気を導入することができる場合には、必ずしも給気口 13 2を設ける必要はない。 [0023] The air introduced from the air supply port 132 is not limited to normal temperature, and is preheated by, for example, exchanging heat with the combustion gas exhausted through the exhaust port 131 or other waste heat. Air may be introduced. Further, the formation position and the number of the air supply openings 132 are limited to the present embodiment. It can be set as appropriate depending on the necessary air introduction amount. Further, when sufficient air can be introduced from the combustion burner 20 described later, the air supply port 132 is not necessarily provided.
[0024] 支持台 14は、筒状に形成され、側壁に通気部 141を有しており、端面が加熱容器 15の底面と当接することにより加熱容器 15を支持している。通気部 141は、本実施 形態においては、支持台 14の上下両端にそれぞれ等間隔に 4力所形成された溝部 力 なる。  The support base 14 is formed in a cylindrical shape, has a ventilation part 141 on a side wall, and supports the heating container 15 by having an end surface abutting against the bottom surface of the heating container 15. In the present embodiment, the ventilation portion 141 is a groove portion force formed at four force locations at equal intervals on the upper and lower ends of the support base 14.
[0025] 加熱容器 15は、有底で上部に開口 15aを有しており、熱伝導性が良好な材料から なること力 S好ましく、本実施形態においては、その主要部が、黒鉛坩堝からなる容器 本体 151により構成されている。黒鉛坩堝は、非鉄金属溶解用の坩堝炉に多用され ており、鱗状黒鉛及び炭化珪素を主成分とし、熱伝導率が高ぐかつ優れた耐酸化 性、耐熱性及び耐熱衝撃性を有し、低温から高温までの広い温度範囲で優れた耐 久性を発揮する。容器本体 151の上部には 1又は複数の溝部が形成されており、容 器本体 151の上端が、セラミックファイバなどのクッション材（図示せず）を介して円板 状の保持体 152の下面と当接することにより、前記溝部が連通部 153として機能する 。保持体 152は、装置本体 10の上面に着脱可能に固定されており、上方に突出する 部分の上端面が水平面とされて!/、る。  [0025] The heating container 15 has a bottom and has an opening 15a at the top, and is made of a material having good thermal conductivity. S Preferably, in this embodiment, the main part is made of a graphite crucible. Consists of a container body 151. Graphite crucibles are widely used in crucible furnaces for melting non-ferrous metals, mainly composed of scaly graphite and silicon carbide, having high thermal conductivity and excellent oxidation resistance, heat resistance and thermal shock resistance. Excellent durability in a wide temperature range from low to high. One or more grooves are formed in the upper part of the container main body 151, and the upper end of the container main body 151 is connected to the lower surface of the disc-shaped holding body 152 via a cushioning material (not shown) such as ceramic fiber. By the contact, the groove functions as the communication portion 153. The holding body 152 is detachably fixed to the upper surface of the apparatus main body 10, and the upper end surface of the portion protruding upward is a horizontal plane.
[0026] 連通部 153の大きさや数は特に限定されないが、加熱容器 15で生成された塵や 灰などが排出されないように、なるべく小さいことが好ましぐその数も必要最小限で あること力 S好ましい。また、連通部 153にフィルタを設けることによって、塵や灰などの 排出を確実に防止してもよい。フィルタとしては、セラミックファイバなどからなるバルタ 状、フェルト状、シート状、メッシュ状の通気性部材を例示することができる。また、燃 焼室 13で生じる燃焼ガスの流れによって容器本体 1 51内の塵灰などが飛散しな!/、よ うに、連通部 153の周囲近傍に、必要に応じて邪魔板などを取り付けてもよい。  [0026] The size and number of the communication portion 153 are not particularly limited, but it is preferable that the number is preferably as small as possible so that dust or ash generated in the heating container 15 is not discharged. S is preferred. In addition, by providing a filter in the communication part 153, it is possible to reliably prevent the discharge of dust and ash. Examples of the filter include a bata-like, felt-like, sheet-like, and mesh-like breathable member made of a ceramic fiber or the like. In addition, if necessary, install baffle plates around the communication part 153 so that dust ash in the container body 151 does not scatter due to the flow of combustion gas generated in the combustion chamber 13. Also good.
[0027] 連通部 153は、燃焼室の上部と連通するように形成されていることが好ましいが、そ の形状は必ずしも本実施形態のように溝部である必要はない。例えば、加熱容器 15 の側壁に形成した貫通孔を連通部 153とすることもできる。また、保持体 152の下面 に突部を設け、この突部が容器本体 151の上端面と当接することにより形成された当 該突部間の隙間を連通部 153としてもよい。また、容器本体 151の上端面と保持体 1 52の下面との間に形成された隙間を連通部 153としてもよい。 [0027] The communication part 153 is preferably formed so as to communicate with the upper part of the combustion chamber, but its shape does not necessarily have to be a groove as in this embodiment. For example, a through hole formed in the side wall of the heating container 15 can be used as the communication portion 153. Further, a protrusion is provided on the lower surface of the holding body 152, and this protrusion is formed by contacting the upper end surface of the container body 151. A gap between the protrusions may be used as the communication portion 153. Further, a gap formed between the upper end surface of the container main body 151 and the lower surface of the holding body 152 may be used as the communication portion 153.
[0028] 燃焼パーナ 20は、予備燃焼を行うパイロットパーナと、本燃焼を行うメインパーナと を備える公知の構成であり、燃料パイプ 21及び燃焼用給気パイプ 22を介してそれぞ れ供給する燃料及び燃焼用空気の流量 (空気比）を適宜調整することにより、燃焼負 荷や燃焼温度を制御することができる。燃焼パーナ 20は、燃焼室 13の上部におい て連通部 153よりも下方位置に設けられており、生成された燃焼ガス力 加熱容器 1 5の周囲を旋回しながら排気口 131から排出されるように、加熱容器 15の接線方向 で且つ水平方向よりも僅かに下方に向けて配置されている。燃焼パーナ 20及び排 気口 131の配置は、必ずしも本実施形態のものに限定されないが、燃焼パーナ 20か ら燃焼室 13に供給された燃焼ガスが、燃焼室 13内において十分撹拌され、且つ、 排気口 131から排出されるまでの燃焼時間を十分確保することができるような配置で あること力 S好ましい。なお、燃焼室 13の内部に必要に応じて撹拌板などを設け、燃焼 ガスの撹拌 ·混合を促すようにしてもょレ、。  [0028] Combustion burner 20 has a known configuration including a pilot burner that performs pre-combustion and a main burner that performs main combustion, and fuel supplied through fuel pipe 21 and combustion air supply pipe 22 respectively. By appropriately adjusting the flow rate (air ratio) of the combustion air, the combustion load and combustion temperature can be controlled. The combustion pan 20 is provided at a lower position than the communication part 153 in the upper part of the combustion chamber 13 so that it is discharged from the exhaust port 131 while swirling around the generated combustion gas force heating vessel 15. The heating container 15 is arranged in the tangential direction and slightly downward from the horizontal direction. The arrangement of the combustion panner 20 and the exhaust port 131 is not necessarily limited to that of the present embodiment, but the combustion gas supplied from the combustion panner 20 to the combustion chamber 13 is sufficiently stirred in the combustion chamber 13, and It is preferable that the arrangement is such that a sufficient combustion time until exhaust from the exhaust port 131 can be secured. If necessary, a stirring plate may be installed inside the combustion chamber 13 to encourage stirring and mixing of the combustion gas.
[0029] 煙道 30は、排気口 131から水平に延びた配管が屈曲して鉛直上方に延びるように 形成されており、煙道 30の一部には断面積が拡大された拡径部 31が形成されてい る。排気口 131と拡径部 31との間（すなわち、拡径部 31の上流側）には、ブロワなど の加圧空気供給源（図示せず)から燃焼用空気を供給可能な第 2の補助給気パイプ 32が設けられている。第 2の補助給気パイプ 32の先端部には 1又は複数の給気口 3 21が形成されており、第 2の補助給気パイプ 32の途中に介在された制御弁 322の 開度調整により、燃焼用空気を煙道 30に所望の流量で供給することができる。尚、 煙道 30の屈曲部には、清掃用の密閉式開閉扉 301が設けられている。  [0029] The flue 30 is formed such that a pipe extending horizontally from the exhaust port 131 is bent and extends vertically upward. A part of the flue 30 has an enlarged diameter portion 31 having an enlarged cross-sectional area. Is formed. A second auxiliary capable of supplying combustion air from a pressurized air supply source (not shown) such as a blower between the exhaust port 131 and the enlarged diameter portion 31 (that is, upstream of the enlarged diameter portion 31). An air supply pipe 32 is provided. One or more air inlets 321, 21 are formed at the tip of the second auxiliary air supply pipe 32. By adjusting the opening of the control valve 322 interposed in the middle of the second auxiliary air supply pipe 32, The combustion air can be supplied to the flue 30 at a desired flow rate. A sealed opening / closing door 301 for cleaning is provided at the bent portion of the flue 30.
[0030] 拡径部 31には、複数の邪魔板 311が上下方向に沿って複数配置されており、排気 口 131から導入される燃焼ガスと、第 2の補助給気パイプ 32から導入される燃焼用 空気とが、拡径部 31の内部において十分混合 ·撹拌されると共に、滞留時間が確保 されるように構成されて!/、る。  [0030] A plurality of baffle plates 311 are arranged in the up-down direction in the enlarged diameter portion 31, and are introduced from the combustion gas introduced from the exhaust port 131 and the second auxiliary air supply pipe 32. Combustion air is sufficiently mixed and stirred inside the enlarged diameter portion 31 and the residence time is secured! /.
[0031] また、加熱容器 15は、円筒状のタワー本体 41を有する予熱タワー 40を備えている 。予熱タワー 40は、下部にローラ 401を備えており、装置本体 10の上面に沿って配 置されたレール 402上を図面の貫通方向に移動可能とされている。タワー本体 41の 下端は、保持体 152の直上に移動させた状態で、固定手段（図示せず）により保持 体 152の上端に密着固定することができる。これにより、予熱タワー 40は、燃焼室 13 の上方に突出する状態で加熱容器 15の開口 15aを密閉する。 [0031] The heating container 15 includes a preheating tower 40 having a cylindrical tower body 41. The preheating tower 40 includes a roller 401 at the bottom, and is arranged along the upper surface of the apparatus main body 10. It is possible to move on the rail 402 placed in the drawing through direction. The lower end of the tower body 41 can be tightly fixed to the upper end of the holding body 152 by a fixing means (not shown) in a state where the lower end is moved right above the holding body 152. Thereby, the preheating tower 40 seals the opening 15a of the heating container 15 in a state of protruding upward from the combustion chamber 13.
[0032] 予熱タワー 40は、アルミニウム切粉などの有価金属を含む廃棄物を加熱容器 15内 に投入するための投入装置 42と、加熱容器 15内で溶融した金属を撹拌する撹拌装 置 44と、加熱容器 15内の燃焼状態を観察するための耐熱カメラ 46とを備えている。  [0032] The preheating tower 40 includes an input device 42 for supplying waste containing valuable metals such as aluminum chips into the heating container 15, and an agitation device 44 for stirring the molten metal in the heating container 15. And a heat-resistant camera 46 for observing the combustion state in the heating container 15.
[0033] 投入装置 42は、タワー本体 41の側壁に対して直交する方向（水平方向）に延びる ように設けられたケーシング 421を備えている。ケーシング 421は、廃棄物が投入さ れるホッノ 422と、タワー本体 41の中心に向けて水平に延びるスクリューコンベア 42 3とを備えており、ホッパ 422には、開閉蓋 422aが取り付けられている。スクリューコン ベア 423は、外周面に螺旋状のスクリュー羽根 423aを備えており、電動モータ 424 の作動によって回転することにより、ホッパ 422から投入された廃棄物等の被処理物 をタワー本体 41に向けて押し込むように搬送する。ケーシング 421の先端には、タヮ 一本体 41の内周面と中心軸線との略中間位置に開口する廃棄物排出口 425が形 成されており、搬送された廃棄物は、廃棄物排出口 425から加熱容器 15内に落下 する。電動モータ 424の回転速度は調整可能であり、廃棄物を加熱容器 15内に連 続供給する際の供給量を制御することができる。また、ケーシング 422の周囲には冷 却水ジャケット 426が設けられており、搬送中のケーシング 422内の廃棄物を冷却す ること力 Sでさる。  The charging device 42 includes a casing 421 provided so as to extend in a direction (horizontal direction) orthogonal to the side wall of the tower main body 41. The casing 421 includes a hono 422 into which waste is charged and a screw conveyor 423 extending horizontally toward the center of the tower main body 41, and an open / close lid 422a is attached to the hopper 422. The screw conveyor 423 has spiral screw blades 423a on its outer peripheral surface, and rotates by the operation of the electric motor 424, so that the processing object such as waste thrown in from the hopper 422 is directed toward the tower body 41. And then push it in. At the front end of the casing 421, a waste discharge port 425 is formed that is opened at a substantially middle position between the inner peripheral surface of the main body 41 and the central axis, and the transported waste is discharged from the waste discharge port. Drops into heating container 15 from 425. The rotation speed of the electric motor 424 can be adjusted, and the supply amount when the waste is continuously supplied into the heating container 15 can be controlled. In addition, a cooling water jacket 426 is provided around the casing 422, and the force S for cooling the waste in the casing 422 being conveyed is used.
[0034] 撹拌装置 44は、ステンレスなどの耐熱材料からなるシャフト 441の先端に、撹拌羽 根 442が螺合ゃ嵌合などによって固定されており、シャフト 441の基端側は、予熱タ ヮー 40の上部に形成された貫通孔 40aを介して上方に突出し、電動モータ 443に連 結されている。撹拌羽根 442は、電動モータ 443の作動によりシャフト 441を介して 駆動力が伝達されることで、容器本体 151内の下部中央において水平回転可能とさ れている。シャフト 441は、フランジ部 441aにおいて分離可能であり、貫通孔 40aと の間にはシールファイバ等が介在されることにより、気密状態が保持される。シャフト 4 41は上下方向に進退可能であり、予熱タワー 40をレール 402に沿って移動させる際 に、撹拌羽根 442を加熱容器 15と干渉しないように上方に待避させることができる。 [0034] The stirring device 44 is fixed to the tip of a shaft 441 made of a heat-resistant material such as stainless steel by screwing or the like with the stirring blade 442, and the base end side of the shaft 441 is preheated. It protrudes upward through a through-hole 40a formed in the upper part and is connected to an electric motor 443. The stirring blade 442 is horizontally rotatable at the lower center in the container main body 151 by transmitting a driving force via the shaft 441 by the operation of the electric motor 443. The shaft 441 is separable at the flange portion 441a, and a sealing fiber or the like is interposed between the shaft 441 and the through hole 40a, thereby maintaining an airtight state. The shaft 4 41 can move up and down in the vertical direction, and when the preheating tower 40 is moved along the rail 402, In addition, the stirring blade 442 can be retracted upward so as not to interfere with the heating container 15.
[0035] 撹拌羽根 442の形状として、本実施形態ではプロペラ羽根を使用しており、容器本 体 151内に貯留された溶湯に渦流を生じさせることで、溶湯表面に落下した廃棄物 を速やかに溶湯中に巻き込むように構成している力 S、このような作用を生じさせる羽 根の形状であれば特に限定されず、例えば、スクリュー羽根、タービン羽根、アンカ 一羽根、パドル羽根などを使用することもできる。また、本実施形態では、撹拌羽根 4 42の枚数を 4枚としている力、特に限定されず、例えば 2枚や 3枚などであってもよい 。また、撹拌羽根 442をシャフト 441の軸方向に沿って複数段に設けてもよぐ溶湯 の粘性が高レ、場合に特に効果的である。 [0035] As the shape of the stirring blade 442, in this embodiment, a propeller blade is used, and by generating a vortex in the molten metal stored in the container main body 151, the waste that has fallen on the molten metal surface can be promptly removed. There is no particular limitation as long as the force S is configured to be entrained in the molten metal, and the shape of the blade that causes such an action. For example, a screw blade, a turbine blade, an anchor blade, a paddle blade, etc. are used. You can also. In the present embodiment, the force with which the number of the stirring blades 442 is four is not particularly limited, and may be two or three, for example. In addition, this is particularly effective when the viscosity of the molten metal in which the stirring blades 442 are provided in a plurality of stages along the axial direction of the shaft 441 is high.
[0036] 耐熱カメラ 46は、 CCDカメラなどを使用することができ、加熱容器 15の内部を撮像 するように配置され、加熱容器 15内における廃棄物の残量状態や、溶解'ガス発生 などの状況を確認することができる。  [0036] The heat-resistant camera 46 can use a CCD camera or the like, and is arranged so as to take an image of the inside of the heating container 15, and the remaining amount of waste in the heating container 15 and the generation of dissolved gas etc. You can check the situation.
[0037] 容器本体 151の下部には、燃焼室 13の側壁を介して装置本体 10の外部と連通し 、溶湯を外部に排出するための配管からなる排出流路 154が接続されている。排出 流路 154は、水平方向に延びる水平部 155と、水平部 155から分岐して溶湯を上方 へ案内する上方案内部 156とを備えている。水平部 155及び上方案内部 156の先 端には、それぞれメンテナンス口 155a及び溶湯排出口 156aが形成されており、装 置本体 10の側壁に形成された出湯管 155b, 156bを介して溶湯を外部に排出する こと力 Sできる。出湯管 155b, 156bは、それぞれ断熱性の蓋体 155c, 156cにより閉 じられており、加熱処理中は、水平部 155のメンテナンス口 155aをタップ 155dにより 密栓すると共に、上方案内部 156に対応する蓋体 156cを開けることにより、出湯管 1 56bから溶湯を外部に連続的に排出することができる。溶湯排出口 156aは、攪拌羽 根 442を加熱容器 15内の攪拌位置に配置した状態で、攪拌羽根 442よりも上方に 形成されている。また、タップ 155dは、加熱容器 15のメンテナンス時などに開放され  [0037] A discharge channel 154 that is connected to the outside of the apparatus main body 10 through the side wall of the combustion chamber 13 and made of piping for discharging the molten metal to the outside is connected to the lower part of the container main body 151. The discharge channel 154 includes a horizontal portion 155 that extends in the horizontal direction, and an upper guide portion 156 that branches from the horizontal portion 155 and guides the molten metal upward. A maintenance port 155a and a molten metal discharge port 156a are formed at the front ends of the horizontal portion 155 and the upper guide portion 156, respectively, and the molten metal is externally supplied via the hot water discharge pipes 155b and 156b formed on the side wall of the apparatus body 10. It is possible to discharge S. The hot water discharge pipes 155b and 156b are closed by heat insulating lids 155c and 156c, respectively, and during the heat treatment, the maintenance port 155a of the horizontal portion 155 is sealed with a tap 155d and corresponds to the upper guide portion 156. By opening the lid 156c, the molten metal can be continuously discharged from the hot water discharge pipe 156b to the outside. The molten metal discharge port 156a is formed above the stirring blade 442 in a state where the stirring blade 442 is disposed at the stirring position in the heating container 15. The tap 155d is opened during maintenance of the heating container 15.
[0038] 燃焼室 13の各給気口 132、及び、燃焼パーナ 20の燃焼用給気パイプ 22は、それ ぞれ工場エアゃブロワなどの加圧空気供給源に接続される。これらは、それぞれ複 数の加圧空気供給源に個別に接続するようにしてもよぐ或いは、同一の加圧空気 供給源から分岐して接続するようにしてもょレヽ。 [0038] Each air supply port 132 of the combustion chamber 13 and the combustion air supply pipe 22 of the combustion burner 20 are each connected to a pressurized air supply source such as a factory air blower. These may be individually connected to multiple pressurized air sources or the same pressurized air. Even if it branches off from the supply source, it can be connected.
[0039] 次に、以上のように構成された有価金属回収装置 1を用いて、廃棄物から有価金属 を回収する方法について説明する。本実施形態の有価金属回収装置 1は、油、ブラ スチック、有機塗料、ゴム、布、紙、木材などの可燃廃棄物を含む切粉や細断状の廃 棄物（例えば、油付きのアルミニウム又は銅の切粉や、プラスチック付きのサッシ屑、 缶類、金属スクラップなどが粉砕'細断されたもの）のように、細かい或いは薄いため に比表面積が比較的大きい廃棄物から、アルミニウム、銅、亜鉛、錫、貴金属などの 有価金属を高歩留まりで回収するのに好適である。  Next, a method for recovering valuable metal from waste using the valuable metal recovery apparatus 1 configured as described above will be described. The valuable metal recovery device 1 of the present embodiment is a chip or shredded waste containing combustible waste such as oil, plastic, organic paint, rubber, cloth, paper, and wood (for example, aluminum with oil). Or wastes with a relatively large specific surface area, such as copper chips, sash scraps with plastic, cans, metal scrap, etc. It is suitable for recovering valuable metals such as zinc, tin and noble metals with a high yield.
[0040] まず、撹拌羽根 442を上方に待避させてタワー本体 41を移動させることにより、容 器本体 151の上方を開放し、回収される有価金属と同じ材料からなるインゴットを容 器本体 151内に収容する。そして、タワー本体 41を容器本体 151の直上に移動させ て密閉し、燃焼パーナ 20から燃焼室 13に高温の燃焼ガスを供給することにより、容 器本体 151内のインゴットを溶解する。燃焼室の温度は、回収する有価金属の溶融 温度を考慮して適宜設定すればよぐ例えば、金属廃棄物がアルミ飲料缶やアルミ 切粉等のようなアルミニウム材の場合、燃焼室 13の温度を約 900°Cに設定すること ができる。燃焼室 13の温度は、温度センサ（図示せず）などでモニタリングしながら燃 焼パーナ 20におけるメインパーナ及びパイロットパーナのオン/オフ制御や、給気 口 132のバルブ 132aの開度調整などにより、燃焼量や空気比を調節して所望の温 度に設定可能である。  [0040] First, the stirring blade 442 is retracted upward and the tower main body 41 is moved to open the upper portion of the container main body 151, and an ingot made of the same material as the valuable metal to be recovered is contained in the container main body 151. To house. Then, the tower main body 41 is moved directly above the container main body 151 and sealed, and high temperature combustion gas is supplied from the combustion burner 20 to the combustion chamber 13, thereby melting the ingot in the container main body 151. The temperature of the combustion chamber should be set appropriately in consideration of the melting temperature of the valuable metal to be recovered.For example, when the metal waste is an aluminum material such as an aluminum beverage can or aluminum chips, the temperature of the combustion chamber 13 Can be set to about 900 ° C. While the temperature of the combustion chamber 13 is monitored by a temperature sensor (not shown), the combustion is performed by on / off control of the main and pilot burners in the combustion burner 20 and by adjusting the opening of the valve 132a of the supply port 132. It can be set to the desired temperature by adjusting the volume and air ratio.
[0041] インゴットが溶解され元湯が貯留されたことを耐熱カメラ 46で確認した後、撹拌羽根 442を降下させて溶湯内に浸漬させて撹拌装置 44を作動させ、撹拌羽根 442を回 転する。容器本体 151の溶湯は、撹拌羽根 442の回転により旋回され、渦流が発生 する。これにより、溶湯の液面 Lは、図示のように容器本体 151の内面と接する部分 が持ち上げられるため、貯留された溶湯は、排出流路 154の上方案内部 156を経て 出湯管 156bに案内される。そして、蓋体 156cを取り外すことにより、溶湯を外部に 供給すること力できる。本実施形態においては、排出流路 154の溶湯排出口 156a 、撹拌羽根 442よりも上方に形成されているため、投入装置 42及び撹拌装置 44を 停止すると、溶湯の供給も停止される。したがって、有価金属からなる溶湯の供給及 び停止を、投入装置 42及び撹拌装置 44の作動状態に連動させることができる。また 、排出流路 154の内部が溶湯により常時満たされた状態になるため、加熱容器 15の 内部で発生した未燃ガス等力 溶湯排出口 156aから外部に放出されるのを防止す ること力 Sでさる。 [0041] After confirming that the ingot is melted and the main hot water is stored with the heat-resistant camera 46, the stirring blade 442 is lowered and immersed in the molten metal to operate the stirring device 44, and the stirring blade 442 is rotated. . The molten metal in the container body 151 is swirled by the rotation of the stirring blade 442 to generate a vortex. As a result, the liquid level L of the molten metal is lifted at the portion in contact with the inner surface of the container body 151 as shown in the figure, so that the stored molten metal is guided to the outlet pipe 156b via the upper guide part 156 of the discharge channel 154. The The molten metal can be supplied to the outside by removing the lid 156c. In the present embodiment, since the molten metal discharge port 156a of the discharge channel 154 is formed above the stirring blade 442, the supply of the molten metal is stopped when the charging device 42 and the stirring device 44 are stopped. Therefore, supply of molten metal consisting of valuable metals and The stoppage can be linked to the operating state of the charging device 42 and the stirring device 44. In addition, since the inside of the discharge channel 154 is always filled with the molten metal, it is possible to prevent the unburned gas, etc. generated inside the heating vessel 15 from being discharged from the molten metal outlet 156a to the outside. Touch with S.
[0042] そして、撹拌装置 44の作動開始と共に、投入装置 42のスクリューコンベア 423を作 動させ、ホッパ 422から廃棄物を投入する。投入された廃棄物は、スクリューコンベア 423によりタワー本体 41に向けて搬送され、開口 15aを介して容器本体 151に落下 する。開口 15aは予熱タワー 40により密閉されているので、容器本体 151内に落下し た廃棄物の燃焼に伴い、容器本体 151の内部が無酸素状態又は低酸素状態となり 、燃焼が還元雰囲気下で行われる。本実施形態においては、容器本体 151を支持 する支持台 14に通気部 141が形成されているので、燃焼ガスは、容器本体 151の側 壁だけでなく底部とも接触し、加熱容器 15の全体を効率よく加熱することができる。こ のような加熱容器 15の伝熱を利用した間接加熱により廃棄物を還元燃焼させること で、廃棄物に含まれる有価金属の酸化を抑制することができる。容器本体 151には、 必要に応じてヤシの実やプラスチックなどの炭化を促進する材料を投入し、還元雰 囲気を強化するようにしてもよい。このように、金属廃棄物を還元雰囲気で溶融するこ とにより、溶融金属の酸化を防ぎ、有価金属としての回収を容易に行うことができる。  [0042] Then, along with the start of the operation of the stirring device 44, the screw conveyor 423 of the input device 42 is operated to input waste from the hopper 422. The thrown-in waste is transported toward the tower main body 41 by the screw conveyor 423 and falls to the container main body 151 through the opening 15a. Since the opening 15a is hermetically sealed by the preheating tower 40, the combustion inside the container body 151 becomes anoxic or low-oxygen state due to the combustion of the waste that has fallen into the container body 151, and the combustion is performed in a reducing atmosphere. Is called. In this embodiment, since the ventilation portion 141 is formed in the support base 14 that supports the container main body 151, the combustion gas contacts not only the side wall but also the bottom of the container main body 151, and the entire heating container 15 is It can be heated efficiently. By reducing and burning the waste by indirect heating using the heat transfer of the heating container 15 as described above, oxidation of valuable metals contained in the waste can be suppressed. The container body 151 may be filled with a material that promotes carbonization, such as coconut or plastic, if necessary, so as to enhance the reducing atmosphere. Thus, by melting metal waste in a reducing atmosphere, oxidation of the molten metal can be prevented and recovery as a valuable metal can be easily performed.
[0043] 容器本体 151に落下した粉砕状の廃棄物は、撹拌羽根 442の回転により発生した 渦流により、溶湯中に速やかに巻き込まれて潜り込んだ状態になる。この結果、廃棄 物中の有価金属は外気と接触せずに溶融するため、有価金属の酸化をより確実に 防止すること力 Sできる。有価金属以外の油、塗料、プラスチックなどの可燃性廃棄物 については、熱分解によりガス状となって放出される。投入装置 42は、被処理物を溶 湯中にできる限り速やかに潜り込ませることができるように、攪拌羽根 442の回転によ る渦流内に被処理物を分散落下させるように配置されて!/、ることが好まし!/、。本実施 形態においては、タワー本体 41の内周面と中心軸線との略中間位置に廃棄物排出 口 425が形成されており、渦流内の溶湯面に被処理物を略均一に分散させることが できる。  [0043] The pulverized waste that has fallen into the container main body 151 is quickly caught in the molten metal by the vortex generated by the rotation of the stirring blade 442, and is in a state of being submerged. As a result, valuable metals in the waste melt without coming into contact with the outside air, so it is possible to more reliably prevent oxidation of valuable metals. Combustible waste such as oil, paints and plastics other than valuable metals are released in the form of gas by thermal decomposition. The charging device 42 is arranged to disperse and drop the processing object into the vortex generated by the rotation of the stirring blade 442 so that the processing object can enter the molten metal as quickly as possible! / I prefer to do that! In the present embodiment, the waste discharge port 425 is formed at a substantially intermediate position between the inner peripheral surface of the tower body 41 and the central axis, and the object to be treated can be distributed substantially uniformly on the molten metal surface in the vortex. it can.
[0044] また、容器本体 151の内周面にリング状のガイド板を設ける等して、溶湯の表面に 堆積され渦流の遠心力により径方向外方に移動する被処理物を、ガイド板の下面に よって溶湯内に速やかに潜り込ませるように構成してもよ!/、。 [0044] Further, by providing a ring-shaped guide plate on the inner peripheral surface of the container body 151, the surface of the molten metal The object to be processed, which is deposited and moves radially outward by the centrifugal force of the vortex, may be configured to be quickly submerged into the melt by the lower surface of the guide plate!
[0045] 燃焼室 13の内部は、高温の燃焼ガスが排気口 131を介して煙道 30を上昇すること によって負圧になるため、加熱容器 15の加熱により廃棄物から発生した水蒸気や有 機系物質等の未燃ガスは、連通部 153から燃焼室 13に導出される。この未燃ガスは 、燃焼室 13で燃焼されて燃焼ガスとなり、燃焼パーナ 20の燃焼ガスと共に排気口 13 1から排出される。本実施形態においては、燃焼パーナ 20が排気口 131よりも上方 に配置されており、燃焼パーナ 20から噴射される燃焼ガスが燃焼室 13の壁面に沿 つて旋回するため、未燃ガスを燃焼室 13内において十分撹拌できると共に、燃焼室 13内における未燃ガスの燃焼時間を十分確保することができる。この結果、燃焼室 1 3における未燃ガスの完全燃焼を促すことができ、排気をクリーンな状態に維持し、 煙、臭気、塵灰などの排出を防止することができる。  [0045] Since the combustion chamber 13 has a negative pressure due to the high-temperature combustion gas rising up the flue 30 through the exhaust port 131, water vapor generated from waste due to heating of the heating container 15 and organic Unburned gas such as a system material is led out from the communication part 153 to the combustion chamber 13. This unburned gas is burned in the combustion chamber 13 to become a combustion gas, and is discharged from the exhaust port 131 together with the combustion gas of the combustion pan 20. In the present embodiment, the combustion burner 20 is disposed above the exhaust port 131, and the combustion gas injected from the combustion burner 20 swirls along the wall surface of the combustion chamber 13. It is possible to sufficiently stir in 13 and to ensure a sufficient combustion time of unburned gas in the combustion chamber 13. As a result, complete combustion of the unburned gas in the combustion chamber 13 can be promoted, the exhaust can be maintained in a clean state, and emission of smoke, odor, dust ash and the like can be prevented.
[0046] また、本実施形態においては、給気口 132から燃焼用空気を燃焼室 13に導入する ことができるので、燃焼パーナ 20から燃焼室 13に導入される空気量が不足する場合 に、この不足分を補って、燃焼室 13内における完全燃焼を確実にすることができる。  In the present embodiment, since combustion air can be introduced into the combustion chamber 13 from the air supply port 132, when the amount of air introduced into the combustion chamber 13 from the combustion partner 20 is insufficient, This shortage can be compensated to ensure complete combustion in the combustion chamber 13.
[0047] 燃焼パーナ 20から供給される燃焼ガスの温度は、未燃ガスやダイォキシン類など の完全燃焼を促す観点から 800°C以上であることが好ましぐ 850°C以上であること 力はり好ましい。燃焼温度の上限は、使用材料の耐熱性などを考慮して決定されるが 、例えば、本実施形態のように黒鉛坩堝を使用する場合には、約 1500°Cの高温使 用も可能である。  [0047] The temperature of the combustion gas supplied from the combustion pan 20 is preferably 800 ° C or higher from the viewpoint of promoting complete combustion of unburned gas and dioxins, etc. preferable. The upper limit of the combustion temperature is determined in consideration of the heat resistance of the material used, but for example, when using a graphite crucible as in this embodiment, it can be used at a high temperature of about 1500 ° C. .
[0048] 加熱容器 15が十分加熱されて、加熱容器 15から燃焼室 13に未燃ガスが連続的に 供給される状態になると、燃焼パーナ 20の燃焼量を低減することができる。例えば、 燃焼パーナ 20のメインバーナを停止し、パイロットパーナのみを燃焼させるようにして もよく、或いは、燃焼パーナ 20への燃料の供給を停止し、燃焼パーナ 20からは常温 の空気のみを供給するようにしてもよい。この際、給気口 132のバルブ 132aの開度 を調整して、燃焼室 13の内部が最適な空燃比となるように制御することができる。特 に、 PET樹脂や塩化ビュル樹脂などのように熱量が高い材料を含む廃棄物の場合 は、大きな自己燃焼熱が得られるので、サーマルリサイクルにより、燃焼パーナ 20の 消費燃料を低減できると共に、排出口 131から排出される高温の排気ガスをボイラや 乾燥などに有効利用することができる。このように、本実施形態の有価金属回収装置 は、廃棄物から有価金属を効率よく回収できるだけでなぐ可燃性廃棄物の燃焼熱も 資源として有効回収でき、熱エネルギの創成による応用展開も可能である。 [0048] When the heating container 15 is sufficiently heated and the unburned gas is continuously supplied from the heating container 15 to the combustion chamber 13, the combustion amount of the combustion burner 20 can be reduced. For example, the main burner of the combustion burner 20 may be stopped and only the pilot burner may be burned, or the fuel supply to the combustion burner 20 is stopped and only air at normal temperature is supplied from the combustion burner 20 You may do it. At this time, the opening degree of the valve 132a of the air supply port 132 can be adjusted to control the inside of the combustion chamber 13 to have an optimum air-fuel ratio. In particular, in the case of waste containing materials with high calorific values, such as PET resin and chlorinated resin, large self-combustion heat can be obtained. The fuel consumption can be reduced and the high-temperature exhaust gas discharged from the discharge port 131 can be effectively used for boilers and drying. As described above, the valuable metal recovery device of the present embodiment can effectively recover the combustion heat of combustible waste, which can recover valuable metals from waste efficiently, and can be applied by creating thermal energy. is there.
[0049] 給気口 132から燃焼室 13内に導入する気体は、空気以外に、酸素など他の支燃 性ガスであってもよぐこれによつて、燃焼室 13内における完全燃焼を促すことができ [0049] The gas introduced into the combustion chamber 13 from the air supply port 132 may be other combustion-supporting gas such as oxygen in addition to air, thereby promoting complete combustion in the combustion chamber 13. It is possible
[0050] 本実施形態の有価金属回収装置 1は、還元燃焼が可能な加熱容器 15内において 、連続投入する廃棄物を速やかに溶湯内に潜り込ませることにより、溶湯の酸化を確 実に防止して高品質の有価金属を回収できるようにしたことを特徴とするものである。 したがって、大きな処理能力を得るためには、なるべく多量の廃棄物を湯面上に堆積 させずに短時間で溶湯中に巻き込むことが好ましい。このためには、撹拌羽根 442 の回転による溶湯の旋回速度を大きくすると共に、容器本体 151の内径も大きくする ことが好ましい。例えば、廃棄物の最大処理能力として、約 100〜3000kg/hが必 要な場合、内径が、約 400〜； 1200mmの容器本体 151を使用し、溶湯の旋回速度 力 最も速い最外周で約 3〜30m/secとなるように、撹拌羽根 442の回転速度を設 定すればよい。このような撹拌羽根 442の回転を実現するためには、約 100〜500r pmの回転速度で回転可能な可変式回転撹拌プロペラ装置を用いることが好ましい。 なお、容器本体 151の内径を大きくすることは、溶湯の貯留量も大きくなつて溶湯温 度を維持し易いことから、安定した連続溶解処理を可能にする観点からも好ましい。 [0050] The valuable metal recovery device 1 of the present embodiment reliably prevents oxidation of the molten metal by quickly submerging the continuously charged waste into the molten metal in the heating vessel 15 capable of reducing combustion. This is characterized in that high-quality valuable metals can be recovered. Therefore, in order to obtain a large treatment capacity, it is preferable to entrap as much waste as possible in the molten metal in a short time without depositing it on the molten metal surface. For this purpose, it is preferable to increase the swirl speed of the molten metal by the rotation of the stirring blade 442 and to increase the inner diameter of the container main body 151. For example, when a maximum waste disposal capacity of about 100 to 3000 kg / h is required, a container body 151 with an inner diameter of about 400 to 1200 mm is used, and the swirl speed of the melt is about 3 at the fastest outermost circumference. What is necessary is just to set the rotational speed of the stirring blade 442 so that it may be set to -30m / sec. In order to realize such rotation of the stirring blade 442, it is preferable to use a variable rotary stirring propeller device that can rotate at a rotational speed of about 100 to 500 rpm. Increasing the inner diameter of the container main body 151 is also preferable from the viewpoint of enabling stable continuous melting treatment because the molten metal storage amount is increased and the molten metal temperature is easily maintained.
[0051] 以上、本発明の一実施形態について詳述したが、本発明の具体的な態様は上記 実施形態に限定されない。本実施形態の有価金属回収装置 1は、加熱容器 15内に 投入する廃棄物を溶湯中に潜り込ませて溶融するため、高品質の有価金属を高歩 留まりで回収するためには、加熱容器 15を十分加熱することができる構成が好ましい 。そこで、図 2に示すように、燃焼室 1301の内部に隔壁 1302を配置することにより、 燃焼室 1301を、加熱容器 15を収容する第 1燃焼室 1303と、第 1燃焼室 1303を取 り囲む第 2燃焼室 1304とを備える 2重構造としてもよい。なお、図 2において、図 1に 示す構成と同様の構成部分には、同一の符号を付している。 [0052] 図 2に示す有価金属回収装置 101は、隔壁 1302の上端と保持体 152の下面との 間に隙間が形成されている。また、容器本体 151の上端にはリング状のフランジ部 1 511が固定されており、フランジ部 1511の外縁部が、前記隙間を介して第 2の燃焼 室 1304に延在している。これにより、フランジ部 1511と保持体 152との間に、加熱 容器 15の内部と第 2燃焼室 1304とを連通する連通部 1531が形成されている。連通 部 1531は、第 1燃焼室 1303を経ずに第 2燃焼室 1304と直接連通しており、リング 状のフィルタ 1531aが交換可能に配置されている。 [0051] Although one embodiment of the present invention has been described in detail above, a specific aspect of the present invention is not limited to the above embodiment. The valuable metal recovery apparatus 1 of the present embodiment melts the waste thrown into the heating container 15 into the molten metal. Therefore, in order to recover high-quality valuable metal at a high yield, the heating container 15 The structure which can fully heat is preferable. Therefore, as shown in FIG. 2, by disposing a partition wall 1302 inside the combustion chamber 1301, the combustion chamber 1301 surrounds the first combustion chamber 1303 that houses the heating container 15 and the first combustion chamber 1303. A double structure including the second combustion chamber 1304 may be used. In FIG. 2, the same components as those shown in FIG. 1 are denoted by the same reference numerals. In the valuable metal recovery apparatus 101 shown in FIG. 2, a gap is formed between the upper end of the partition wall 1302 and the lower surface of the holding body 152. A ring-shaped flange portion 1511 is fixed to the upper end of the container main body 151, and an outer edge portion of the flange portion 1511 extends to the second combustion chamber 1304 via the gap. Thus, a communication portion 1531 that connects the inside of the heating container 15 and the second combustion chamber 1304 is formed between the flange portion 1511 and the holding body 152. The communication portion 1531 directly communicates with the second combustion chamber 1304 without passing through the first combustion chamber 1303, and a ring-shaped filter 1531a is disposed so as to be replaceable.
[0053] 第 1燃焼室 1303の下部には、第 1の燃焼パーナ 201が配置され、第 2の燃焼室 13 04の上部には、第 2の燃焼パーナ 202が配置されている。第 1の燃焼パーナ 201及 び第 2の燃焼パーナ 202の構成は、図 1に示す燃焼パーナ 20と同様であるため、説 明を省略する。第 1の燃焼パーナ 201により第 1燃焼室 1303で生成された燃焼ガス は、フランジ部 1511と隔壁 1302の上端との間に形成された燃焼ガス排出部 1305を 介して、第 2燃焼室 1304に排出される。第 1燃焼室 1303と第 2燃焼室 1304との間 には、周方向に沿って複数のスぺーサ 1306が配置されており、第 2燃焼室 1304の 室内が所定の大きさに保持されている。  [0053] A first combustion burner 201 is disposed below the first combustion chamber 1303, and a second combustion burner 202 is disposed above the second combustion chamber 1304. The configuration of the first combustion burner 201 and the second combustion burner 202 is the same as that of the combustion burner 20 shown in FIG. Combustion gas generated in the first combustion chamber 1303 by the first combustion burner 201 enters the second combustion chamber 1304 via a combustion gas discharge portion 1305 formed between the flange portion 1511 and the upper end of the partition wall 1302. Discharged. A plurality of spacers 1306 are disposed along the circumferential direction between the first combustion chamber 1303 and the second combustion chamber 1304, and the interior of the second combustion chamber 1304 is maintained at a predetermined size. Yes.
[0054] このように構成された有価金属回収装置 101によれば、第 1燃焼室 1303において は、加熱容器 15内で発生した未燃ガスが供給されず、しかも燃焼が必ずしも完結す る必要がないので、第 1の燃焼パーナ 201による容器本体 151の加熱効率を高める ことができ、溶湯を高温に維持することができる。一方、第 2燃焼室 1304においては 、加熱容器 15内で発生した未燃ガス力 S、第 1燃焼室 1303で生成された燃焼ガスと 合流し、必要に応じて給気口 132から供給される空気と混合することにより、完全燃 焼が促される。したがって、加熱容器 15内の溶湯に対する加熱効率を良好に維持し つつ、燃焼効率を高めてクリーン燃焼を実現することができる。第 1燃焼室 1303の容 積及び第 2燃焼室 1304の容積の合計は、図 1に示す燃焼室 13の容積と同程度でよ ぐコンパクトな構成を維持することができる。第 1燃焼室 1303及び第 2燃焼室 1304 を備える構成において、第 2燃焼室 1304に配置される第 2の燃焼パーナ 202は必ず しも必要ではなぐ第 1燃焼室 1303のみに第 1の燃焼パーナ 201を備えた構成にす ることも可倉である。 [0055] また、図 1に示す有価金属回収装置 1において、投入装置 42は、タワー本体 41に 対して複数設けてもよい。例えば、複数の投入装置 42をタワー本体 41の中心から放 射状に配置することで、廃棄物を容器本体 151の渦流内に均一に分散落下させるこ とが容易になる。また、投入装置 42をタワー本体 41の側壁に設ける変わりに、タワー 本体 41の上部から被処理物が落下するように配置してもよ!/、。 [0054] According to the valuable metal recovery apparatus 101 configured as described above, in the first combustion chamber 1303, the unburned gas generated in the heating container 15 is not supplied, and the combustion is not necessarily completed. Therefore, the heating efficiency of the container main body 151 by the first combustion burner 201 can be increased, and the molten metal can be maintained at a high temperature. On the other hand, in the second combustion chamber 1304, the unburned gas force S generated in the heating container 15 merges with the combustion gas generated in the first combustion chamber 1303, and is supplied from the air inlet 132 as necessary. Mixing with air promotes complete combustion. Therefore, it is possible to improve the combustion efficiency and achieve clean combustion while maintaining good heating efficiency for the molten metal in the heating container 15. The total of the volume of the first combustion chamber 1303 and the volume of the second combustion chamber 1304 is the same as the volume of the combustion chamber 13 shown in FIG. In the configuration including the first combustion chamber 1303 and the second combustion chamber 1304, the second combustion chamber 202 disposed in the second combustion chamber 1304 is not necessarily required, and only the first combustion chamber 1303 is not required. It is also possible to have a configuration with 201. In the valuable metal recovery apparatus 1 shown in FIG. 1, a plurality of input devices 42 may be provided for the tower main body 41. For example, by disposing a plurality of input devices 42 in a radiating manner from the center of the tower main body 41, it becomes easy to uniformly disperse the waste into the vortex of the container main body 151. In addition, instead of providing the charging device 42 on the side wall of the tower body 41, it may be arranged so that the workpiece falls from the top of the tower body 41! /.
[0056] 本実施形態の有価金属回収装置 1で処理する廃棄物等の被処理物は、投入装 置 42によるスムーズな搬送を可能にするため、必要に応じて、事前に粉砕処理を行 つてもよい。或いは、投入装置 42のホッパ 422に粉砕装置を接続して、被処理物を 粉砕装置で予め粉砕してから、投入装置 42に投入されるように構成してもよい。  [0056] To be processed, such as waste, to be processed by the valuable metal recovery apparatus 1 of the present embodiment, it is possible to perform smooth conveyance by the input apparatus 42. Also good. Alternatively, a pulverizer may be connected to the hopper 422 of the charging device 42 so that the object to be processed is previously pulverized by the pulverizing device and then charged into the charging device 42.
[0057] また、投入装置 42は、スクリューコンベア 423による搬送中の廃棄物の粉砕を促 すため、ケーシング 421内に固定刃または回転刃を適宜配置してもよい。投入装置 4 2の具体的な構成は、本実施形態のものに限定されず、加熱容器 15内に生成される 溶湯の渦流内に廃棄物等の被処理物を落下させることができるものであれば、他の 構成であってもよい。例えば、切粉状、細断状の被処理物を収容した回収容器に振 動を付与して、傾斜路などを介して加熱容器内に落下させる構成の投入装置を用い ることあでさる。  [0057] In addition, the charging device 42 may appropriately arrange a fixed blade or a rotary blade in the casing 421 in order to promote the pulverization of the waste being conveyed by the screw conveyor 423. The specific configuration of the charging device 42 is not limited to that of the present embodiment, and is capable of dropping an object to be treated such as waste in the vortex of the molten metal generated in the heating container 15. For example, other configurations may be used. For example, it is possible to use a charging device configured to apply vibration to a collection container containing a chip-like or shredded object to be processed and drop it into a heating container via an inclined path or the like.
[0058] また、図 1に示す有価金属回収装置 1における加熱容器 15としては、黒鉛坩堝から なる容器本体 151と、黒鉛坩堝材等の耐熱材料力もなる排出流路 154とが一体化さ れた異形の黒鉛坩堝を使用することができる。異形の黒鉛坩堝としては、その他、例 えば図 3に示すように、容器本体 151と一体化される排出流路 1541を構成する上方 案内部 1561が、水平部 155から分岐するのではなぐ容器本体 151の側壁から導 出されこの側壁に隣接しながら上方に延びる構成にして、上方案内部 1561の途中 に形成された出湯口 1562を介して溶湯を排出できるようにしてもよい。この構成によ れば、上方案内部 1561を通過する溶湯力、容器本体 151内に貯留された溶湯から 伝熱を受けるため、出湯管 156bから排出される溶湯の温度を高温に維持することが できる。  In addition, as the heating container 15 in the valuable metal recovery apparatus 1 shown in FIG. 1, a container main body 151 made of a graphite crucible and a discharge flow path 154 also having a heat resistant material force such as a graphite crucible material are integrated. A deformed graphite crucible can be used. As an irregular shaped graphite crucible, as shown in FIG. 3, for example, the container main body in which the upper guide part 1561 constituting the discharge flow path 1541 integrated with the container main body 151 is not branched from the horizontal part 155. The molten metal may be discharged through a hot water outlet 1562 formed in the middle of the upper guide portion 1561 so as to be guided from the side wall of 151 and extend upward while adjoining the side wall. According to this configuration, since the molten metal passing through the upper guide portion 1561 and heat transfer from the molten metal stored in the container body 151, the temperature of the molten metal discharged from the outlet pipe 156b can be maintained at a high temperature. it can.
[0059] また、本実施形態においては、容器本体 151が黒鉛坩堝により構成されている力 亜鉛や低融点アルミニウム合金材などのように溶融温度が低!、金属廃棄物を溶融さ せる場合には、安価で熱伝導性が良好な鉄製の容器からなる容器本体 151を使用 することもできる。なお、容器本体 151としては、その他に、耐火セラミック製や鉄以外 の金属製の容器などを使用することもできる。 [0059] In the present embodiment, the container body 151 is composed of a graphite crucible. The melting temperature is low, such as zinc or a low melting point aluminum alloy material, and the metal waste is melted. In this case, it is possible to use a container body 151 made of an iron container that is inexpensive and has good thermal conductivity. In addition, as the container body 151, a container made of a metal other than refractory ceramics or iron can be used.

Claims

請求の範囲 The scope of the claims
[1] 被処理物に含まれる有価金属を回収するための有価金属回収装置であって、 燃焼室を有する装置本体と、  [1] A valuable metal recovery device for recovering valuable metals contained in an object to be processed, the device main body having a combustion chamber;
前記燃焼室に加熱気体を供給する燃焼パーナと、  A combustion pan for supplying heated gas to the combustion chamber;
前記燃焼室で生成された燃焼ガスを外部に排出する煙道と、  A flue for discharging the combustion gas generated in the combustion chamber to the outside;
前記燃焼室内に配置され、被処理物を収容する加熱容器とを備え、  A heating container disposed in the combustion chamber and containing an object to be processed;
前記加熱容器は、有底で上部に密閉可能な開口を有し、前記燃焼室の上部と連 通する連通部が形成されており、  The heating vessel has a bottom and an opening that can be sealed at the top, and has a communication portion that communicates with the top of the combustion chamber.
前記加熱容器内に前記開口を介して被処理物を連続投入する投入装置と、 前記加熱容器内で生成された溶湯を攪拌する攪拌装置とを更に備える有価金属 回収装置。  A valuable metal recovery apparatus, further comprising: a charging device that continuously charges an object to be processed into the heating container through the opening; and a stirring device that stirs the molten metal generated in the heating container.
[2] 前記攪拌装置は、溶湯内に浸漬されて回転により溶湯に渦流を生じさせる攪拌羽 根を備え、  [2] The stirring device includes a stirring blade that is immersed in the molten metal and generates a vortex in the molten metal by rotation,
前記投入装置は、前記渦流内に被処理物を落下させるように配置されている請求 項 1に記載の有価金属回収装置。  The valuable metal recovery apparatus according to claim 1, wherein the charging device is arranged to drop an object to be processed in the vortex.
[3] 前記加熱容器は、下部が前記燃焼室の側壁を介して前記装置本体の外部と連通 する排出流路を備え、該排出流路の先端に形成された溶湯排出口を介して溶湯を 排出可能に構成されており、 [3] The heating container includes a discharge channel whose lower part communicates with the outside of the apparatus main body via a side wall of the combustion chamber, and the molten metal is supplied through a melt discharge port formed at the tip of the discharge channel. It is configured to discharge,
前記溶湯排出口は、前記攪拌羽根よりも上方に形成されている請求項 2に記載の 有価金属回収装置。  3. The valuable metal recovery apparatus according to claim 2, wherein the molten metal discharge port is formed above the stirring blade.
[4] 前記排出流路は、前記容器本体の側壁から導出され、該側壁に隣接しながら上方 に延びる上方案内部を備え、  [4] The discharge flow path includes an upper guide portion that is led out from a side wall of the container body and extends upward while adjoining the side wall.
前記溶湯排出口は、前記上方案内部の先端に形成されている請求項 3に記載の 有価金属回収装置。  4. The valuable metal recovery apparatus according to claim 3, wherein the molten metal discharge port is formed at a tip of the upper guide portion.
[5] 前記排出流路は、前記溶湯排出口よりも下方に形成され、前記加熱容器の底部近 傍と連通するメンテナンス口を備える請求項 3又は 4に記載の有価金属回収装置。  [5] The valuable metal recovery apparatus according to claim 3 or 4, wherein the discharge channel includes a maintenance port that is formed below the molten metal discharge port and communicates with the vicinity of the bottom of the heating container.
[6] 前記加熱容器は、前記排出流路が一体化された黒鉛坩堝を含む請求項 3から 5の いずれかに記載の有価金属回収装置。 [6] The valuable metal recovery apparatus according to any one of claims 3 to 5, wherein the heating container includes a graphite crucible in which the discharge flow path is integrated.
[7] 前記加熱容器は、前記燃焼室の上方に突出し、前記開口を密閉する筒状の予熱 タワーを備え、 [7] The heating container includes a cylindrical preheating tower that protrudes above the combustion chamber and seals the opening.
前記投入装置は、前記予熱タワーに設けられている請求項 1から 6のいずれかに記 載の有価金属回収装置。  7. The valuable metal recovery apparatus according to claim 1, wherein the charging device is provided in the preheating tower.
[8] 前記予熱タワーは、前記装置本体の上面に沿って移動可能に配置されており、 前記攪拌羽根は、前記予熱タワーを移動させる際に、前記加熱容器と干渉しない ように上方に待避可能である請求項 7に記載の有価金属回収装置。 [8] The preheating tower is movably disposed along the upper surface of the apparatus main body, and the stirring blade can be retracted upward so as not to interfere with the heating container when the preheating tower is moved. The valuable metal recovery device according to claim 7, wherein
[9] 前記投入装置は、被処理物を搬送するスクリューコンベアを備える請求項 1から 8の いずれかに記載の有価金属回収装置。 [9] The valuable metal recovery device according to any one of [1] to [8], wherein the charging device includes a screw conveyor for transporting the workpiece.
[10] 前記燃焼室は、内部に隔壁を配置することにより、前記加熱容器を収容する第 1燃 焼室と、該第 1燃焼室を取り囲む第 2燃焼室とを備え、 [10] The combustion chamber includes a first combustion chamber that houses the heating container by disposing a partition wall therein, and a second combustion chamber that surrounds the first combustion chamber,
前記加熱容器は、前記連通部を介して前記第 2燃焼室と連通しており、 前記燃焼パーナは、少なくとも前記第 1燃焼室に配置されており、  The heating vessel communicates with the second combustion chamber via the communication portion, and the combustion pan is disposed at least in the first combustion chamber,
前記第 1燃焼室で生成された燃焼ガスが、燃焼ガス排出部を介して前記第 2燃焼 室に排出され、前記第 2燃焼室で生成された燃焼ガスが、前記煙道を介して外部に 排出されるように構成された請求項 1から 9のいずれかに記載の有価金属回収装置。  Combustion gas generated in the first combustion chamber is discharged to the second combustion chamber through a combustion gas discharge unit, and combustion gas generated in the second combustion chamber is discharged to the outside through the flue. 10. The valuable metal recovery device according to claim 1, wherein the valuable metal recovery device is configured to be discharged.
PCT/JP2007/068231 2006-09-28 2007-09-20 Precious metal recovering apparatus WO2008038556A1 (en)

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