CN214244484U

CN214244484U - Iron ore smelting device containing lead and zinc

Info

Publication number: CN214244484U
Application number: CN202022232914.4U
Authority: CN
Inventors: 高清秀; 滕领香; 张中奇
Original assignee: Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-09-21
Anticipated expiration: 2030-10-09

Abstract

The utility model provides a device is smelted to lead-zinc containing iron ore belongs to iron ore smelting technical field, including the smelting furnace, feeding mechanism, discharge mechanism and lead discharging mechanism, the smelting furnace is rectangular shape, and the flat bed is in seting up in the blind hole of subaerial, is the contained angle setting between smelting furnace bottom surface and the horizontal plane, and the smelting furnace is used for smelting lead-zinc containing iron ore and output lead water, molten iron and zinc oxide crude, and feeding mechanism is used for carrying lead-zinc containing iron ore to the smelting furnace in, and discharge mechanism is used for accepting the molten iron and the liquid slag of output from the smelting furnace in, and lead discharging mechanism locates the smelting furnace bottom, is used for discharging the lead water of output in the smelting furnace. The utility model provides a pair of contain plumbous zinc iron ore smelting device has and adopts rectangular shape smelting furnace can be used to smelt iron ore that the iron grade is low, lead and zinc content is high, the stable technological effect of smelting in-process reaction.

Description

Iron ore smelting device containing lead and zinc

Technical Field

The utility model belongs to the technical field of iron ore smelting, more specifically say, relate to an iron ore smelting device that contains lead and zinc.

Background

The iron ore smelting mainly adopts a blast furnace smelting process, the development trend is that the furnace volume of a blast furnace is larger and larger, most blast furnaces with large furnace volume adopt concentrate operation, the requirement on the quality standard of raw materials is high, and the iron ore with low lead and zinc content and high grade is required. The domestic supply of iron ores with low lead and zinc contents and high grade is seriously insufficient, most of the iron ores depend on import, and the price of iron ore concentrate containing 65 percent of iron is very high.

Domestic low-grade hematite and limonite reserves are abundant, the price is low, and even if the price is low, the blast furnace smelting process is adopted, the economy is not reasonable.

The low-grade hematite in Xinjiang in China contains 25-45% of iron, about 35% of iron, about 0.3% of lead, about 0.8% of zinc and about 1% of manganese, and also contains precious metal silver, so that the storage capacity is very rich.

In order to reduce the dependence on imported iron ores and improve the economic value of domestic low-grade iron ores such as hematite, limonite and the like, the smelting equipment for the iron ores containing lead and zinc is urgently needed to be designed, so that the iron ores containing lead and zinc can be smelted, the utilization value of the iron ores such as hematite, limonite and the like is improved, three products of lead water, molten iron and zinc oxide crude products can be separated, and valuable metals such as lead, zinc, silver and the like can be simultaneously recovered.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lead-zinc containing iron ore smelting device aims at solving the current technical problem that the iron ore that is low to the iron grade, lead-zinc content is high is unsuitable to utilize the blast furnace to smelt.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a lead-zinc containing iron ore smelting device, which comprises a smelting furnace, a feeding mechanism, a discharging mechanism and a lead discharging mechanism, wherein the smelting furnace is in a long strip shape, is horizontally laid in a blind hole arranged below the ground, the lower part of the blind hole is arranged below the ground, an included angle is formed between the bottom surface of the smelting furnace and the horizontal plane, two ends of the smelting furnace are respectively provided with a feeding hole and a discharging hole, and the smelting furnace is used for smelting lead-zinc containing iron ore and producing lead water, molten iron and crude zinc oxide; the feeding mechanism is arranged on the side of the feeding port and used for conveying lead-zinc-containing iron ore into the smelting furnace; the discharging mechanism is arranged on the side of the discharging opening and is used for receiving the molten iron and the liquid slag produced from the smelting furnace; the lead discharging mechanism is arranged at the bottom of the smelting furnace and used for discharging lead water produced in the smelting furnace.

As another embodiment of the application, the feeding mechanism comprises a weighing platform, a storage bin and a feeding pipeline, wherein the weighing platform is used for weighing the weight of the iron ore to be fed into the smelting furnace; the storage bin is used for containing iron ores, and the weighed iron ores are placed in the storage bin for temporary storage; the feeding pipeline is obliquely arranged, one end of the feeding pipeline is communicated with the first storage bin, the other end of the feeding pipeline is connected with the feeding port, and the iron ore in the storage bin is conveyed into the smelting furnace through the feeding pipeline.

As another embodiment of the application, the discharging mechanism comprises a slag avoiding device, a molten iron runner and a slag runner, the slag avoiding device is communicated with the discharging port and is used for receiving the output molten iron and liquid slag, and the slag avoiding device is used for separating the molten iron and the liquid slag; the molten iron runner is communicated with the output end of the slag avoiding device, and the molten iron flows to the molten iron runner after the molten iron is separated by the slag avoiding device; the slag runner is communicated with the output end of the slag avoiding device, and after the slag avoiding device separates the liquid slag, the liquid slag flows to the slag runner.

As another embodiment of the application, the lead discharging mechanism comprises a collecting tank and lead discharging holes, the collecting tank is transversely arranged below the smelting furnace and used for collecting lead water permeating from brick joints at the bottom of the smelting furnace, and the collecting tank is in a straight shape; the number of the lead discharging holes is 2, the lead discharging holes are formed in two opposite side faces of one end of the collecting tank, and the lead discharging holes are communicated to the inside of the collecting tank and can discharge lead water in the collecting tank.

As another embodiment of the application, the smelting furnace comprises a furnace body, a high-temperature air pipe and a waste gas outlet pipe, wherein the furnace body is horizontally laid in a blind hole arranged below the ground, the lower part of the furnace body is buried below the ground, and the upper part of the furnace body is located above the ground; the high-temperature air pipes are arranged on two sides of the smelting furnace, communicated into the smelting furnace and communicated with a high-temperature air source, and the high-temperature air source conveys high-temperature air into the smelting furnace through the high-temperature air pipes; the waste gas exit tube is a plurality of, all locates smelting furnace upper end and intercommunication to in the smelting furnace, the waste gas that produces in the smelting furnace passes through the waste gas exit tube gets into waste gas waste heat recovery system, discharges up to standard after cooling, dust removal.

As another embodiment of the application, the smelting furnace is sequentially divided into a reaction area, a transition area and a slag-iron separation area along the direction from the feeding hole to the discharging hole, the bottom of the reaction area is arranged under the ground and has a long-strip groove structure, materials entering the smelting furnace react in the reaction area, the feeding hole is positioned at the feeding end of the reaction area, and the lead discharging mechanism is arranged at the bottom of the reaction area; the bottom of the transition area is arranged under the ground and is in a curved arc groove type structure, the materials in the reaction area flow into the transition area, and the lead discharging mechanism is arranged at the bottom of the transition area; the bottom in sediment iron disengagement zone is arranged in the underground and is rectangular cell type structure, and the molten iron that produces in the reaction and sediment pass through the transition zone flows extremely the sediment iron disengagement zone sediment and iron, zinc separation in the sediment iron disengagement zone, the discharge gate is located the discharge end in sediment iron disengagement zone, the transition zone both ends circular arc transition respectively accepts the reaction zone with sediment iron disengagement zone, arrange plumbous mechanism and locate sediment iron disengagement zone bottom.

As another embodiment of this application, bury underground in subaerial the reaction zone the transition district with the sediment iron separation zone is the cell type structure, leaks in subaerial the reaction zone the transition district with the sediment iron separation zone be with the domes of cell type structure looks adaptation, domes with the mutual butt joint lock of cell type structure forms an organic whole and inside is cavity.

As another embodiment of the application, an oxygen pumping assembly for pumping oxygen into the smelting furnace is arranged at the feeding port.

As another embodiment of this application, the feed inlet is located the shallower one end of burial depth on the smelting furnace, the discharge gate is located the deeper one end of burial depth on the smelting furnace.

As another embodiment of the present application, the smelting furnace includes a shell made of a thick steel plate and refractory bricks laid on the inner wall of the shell, and the interior of the shell is hollow.

The utility model provides a pair of contain plumbous zinc iron ore smelting device's beneficial effect lies in: compared with the prior art, the utility model relates to a device is smelted to lead-zinc containing iron ore, the smelting furnace crouches in subaerial blind hole, the below ground is arranged in to the lower part, be an contained angle between smelting furnace and the horizontal plane, the smelting furnace smelts iron ore and can produce the lead water, molten iron and zinc oxide crude, can be to the interior continuous feeding of smelting furnace and accept continuous ejection of compact through feeding mechanism and discharge mechanism, the lead water of output in the smelting furnace can be discharged through lead discharging mechanism, carry high temperature air through the high temperature air pipe in to the furnace body, be used for the coal gas that produces in the combustion reaction process, and emit the heat, maintain the interior high temperature environment of stove, waste gas that produces in the reaction can be through going into waste heat recovery, discharge to reach standard behind the dust pelletizing system, iron making ore that can smelt low, lead and zinc content is high has been realized, and can produce the iron plate, the separation of lead water and zinc oxide crude, solved current low iron grade, to iron ore, The iron ore with high lead and zinc content is not suitable for smelting by a blast furnace, and has the technical effects that the strip-shaped smelting furnace can be used for smelting the iron ore with low iron grade and high lead and zinc content, and the reaction is stable in the smelting process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a lead-zinc containing iron ore smelting device provided by an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A in FIG. 1 (side view of the upper and lower structures of the smelting furnace);

FIG. 3 is a sectional view taken along line B-B in FIG. 1 (a plan view of a lower structure of the smelting furnace);

FIG. 4 is a top view of the upper furnace body structure of the iron ore smelting plant containing lead and zinc provided by the embodiment of the present invention.

In the figure: 1. a smelting furnace; 11. a furnace body; 111. a reaction zone; 112. a transition zone; 113. a slag iron separation zone; 12. a high temperature air pipe; 13. an exhaust gas outlet pipe; 2. a feeding mechanism; 21. a weighing platform; 22. a storage bin; 23. a feed line; 3. a discharging mechanism; 31. a slag avoiding device; 32. a molten iron runner; 33. a slag runner; 4. a lead discharging mechanism; 41. lead discharging holes; 42. collecting tank; 5. blind holes; 6. a feed inlet; 7. a discharge port; 8. an oxygen pumping assembly; 9. a temperature sensor; 10. a display; 110. an infrared imager.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 4, a description will now be given of a lead-zinc containing iron ore smelting device according to the present invention. The smelting device for the iron ore containing lead and zinc comprises a smelting furnace 1, a feeding mechanism 2, a discharging mechanism 3 and a lead discharging mechanism 4, wherein the smelting furnace 1 is in a long strip shape and is horizontally arranged in a blind hole 5 arranged below the ground, the lower part of the smelting furnace is positioned below the ground, an included angle is formed between the bottom surface of the smelting furnace 1 and the horizontal plane, a feeding hole 6 and a discharging hole 7 are respectively arranged at two ends of the smelting furnace 1, and the smelting furnace 1 is used for smelting the iron ore containing lead and zinc and producing lead water, molten iron and crude zinc oxide; the feeding mechanism 2 is arranged at the side of the feeding hole 6 and is used for conveying lead-zinc-containing iron ore into the smelting furnace 1; the discharging mechanism 3 is arranged at the side of the discharging port 7 and is used for receiving the molten iron and the liquid slag produced from the smelting furnace 1; the lead discharging mechanism 4 is arranged at the bottom of the smelting furnace 1 and used for discharging lead water produced in the smelting furnace 1.

Compared with the prior art, the utility model provides a lead-zinc containing iron ore smelting device, the utility model relates to a lead-zinc containing iron ore smelting device, smelting furnace 1 lies flat in the above-ground blind hole 5, the lower part is arranged below the ground, a included angle is formed between the smelting furnace 1 and the horizontal plane, smelting furnace 1 smelts iron ore and can produce lead, molten iron and zinc oxide crude product, can feed into smelting furnace 1 and accept the discharge through feeding mechanism 2 and discharging mechanism 3, the lead produced in smelting furnace 1 can be discharged through lead discharging mechanism 4, high temperature air is conveyed into smelting furnace 1 through high temperature air pipe 12 for coal gas produced in the combustion reaction process, and the heat is discharged, the furnace interior high temperature environment is maintained, waste gas produced in the reaction can reach the standard after going into waste heat recovery, dust pelletizing system and discharge, the iron ore smelting furnace has the advantages that the iron ore with low iron grade and high lead and zinc content can be smelted, the separation of molten iron, lead water and a zinc oxide crude product can be produced, the technical problem that the existing iron ore with low iron grade and high lead and zinc content is not suitable for smelting by using a blast furnace is solved, the strip-shaped smelting furnace 1 can be used for smelting the iron ore with low iron grade and high lead and zinc content, and the reaction is stable in the smelting process.

The structure of the smelting furnace 1 can be the furnace body structure of the smelting furnace 1 in the prior art, and the smelting furnace 1 has the functions of smelting and the like. Before the iron ore containing lead and zinc is put into the smelting furnace 1, the iron ore containing lead and zinc is made into dry balls, the dry balls are put into the smelting furnace 1, after the smelting furnace 1 is horizontally laid, the materials in the smelting furnace 1 can be continuously moved to the discharge port 7 from the feed port 6 side in the reaction, so that after the material reaction in the smelting furnace 1 is completed, the molten iron and the slag can be collected to the discharge port 7 side, the discharge port 7 is opened, the molten iron and the slag can be continuously discharged, and the lead water is discharged through the lead discharging mechanism 4. Through design the utility model discloses a smelting furnace 1, without other instrument and operation, feeding mechanism 2 and discharge mechanism 3 make the material can get into smelting furnace 1 automatically, and the material after the reaction can discharge automatically, compare in blast furnace smelting iron ore, and it is more convenient to operate.

As a specific embodiment of the iron ore smelting device containing lead and zinc provided by the present invention, please refer to fig. 1 to 4, the feeding mechanism 2 includes a weighing platform 21, a storage bin 22 and a feeding pipeline 23, the weighing platform 21 is used for weighing the weight of the iron ore to be fed into the smelting furnace 1; the storage bin 22 is used for containing iron ores, and the weighed iron ores are placed in the storage bin 22 for temporary storage; the feeding pipeline 23 is obliquely arranged, one end of the feeding pipeline is communicated with the storage bin 22, the other end of the feeding pipeline is connected with the feeding hole 6, and the iron ore in the storage bin 22 is conveyed into the smelting furnace 1 through the feeding pipeline 23.

The iron ore entering the smelting furnace 1 is required to be smelted under a certain weight condition, or it can be understood that the iron ore entering the smelting furnace 1 is weighed in advance according to a certain weight, and the iron ore with the certain weight is added, so that molten iron, crude zinc oxide, lead water and the like with certain weight can be generated, and the iron ore can be weighed by the weighing platform 21 and can enter the smelting furnace 1 after being weighed.

The iron ore enters the stock bin 22 after weighing, the process can be realized by mechanical tools or other conveying machines, the iron ore in the stock bin 22 automatically descends and is conveyed to the feed inlet 6 through the feeding pipeline 23, then the iron ore enters the smelting furnace 1, the stock bin 22 is in a wide-mouth shape, the feeding pipeline 23 is in sealing connection with the feed inlet 6, and the included angle between the feeding pipeline 23 and the horizontal plane is about 45 degrees.

As a specific embodiment of the iron ore smelting device containing lead and zinc provided by the present invention, please refer to fig. 1 to 4, the discharging mechanism 3 includes a slag avoiding device 31, an iron runner 32 and a slag runner 33, the slag avoiding device 31 is communicated with the discharging port 7 and receives the outputted molten iron and liquid slag, and the slag avoiding device 31 is used for separating the molten iron and the liquid slag; the molten iron runner 32 is communicated with the output end of the slag avoiding device 31, and after the molten iron is separated by the slag avoiding device 31, the molten iron flows to the molten iron runner 32; the slag runner 33 is communicated with the output end of the slag avoiding device 31, and after the slag avoiding device 31 separates the liquid slag, the liquid slag flows to the slag runner 33.

Keep away sediment ware 31 can be with the separation of molten iron and liquid slag, and the molten iron flow direction is molten iron ditch 32, and liquid slag flow direction is to slag runner 33, and the later stage of being convenient for carries out classification. Specifically, the slag avoiding device 31 is communicated with the discharge hole 6 through a ditch.

The utility model discloses a tapping mode is different with blast furnace deironing mode, the utility model discloses a tapping hole or discharge gate 7 are in normally open state during rectangular shape smelting furnace normal production, and tapping, slag discharging in succession, molten iron and sediment flow out from rectangular shape smelting furnace discharge gate 7 in succession, get into and keep away sediment ware 31, reentrant iron runner 32, realize the separation of slag and iron through keeping away sediment ware 31, the molten iron gets into iron runner 32, and liquid slag gets into slag runner 33, and liquid slag flows into the slag bath after the shrend is handled.

The above operation mode of discharging the material output from the furnace body 11 belongs to the prior art, and the specific operation mode is the operation in the prior art, which is not described herein again, and the setting position of the discharge port 7 is located below and next to the ground.

Referring to fig. 1 to 4, the lead discharging mechanism 4 includes a lead discharging hole 41 and a collecting tank 42, the collecting tank 42 is transversely disposed below the smelting furnace 1 for collecting lead water permeated from a brick joint at the bottom of the smelting furnace 1, and the collecting tank 42 is in a linear shape; lead discharging holes 41 are 2 and are respectively arranged on two opposite side surfaces of one end of the collecting tank 42, and the lead discharging holes 42 are communicated to the inside of the collecting tank 42 and can discharge lead water in the collecting tank 42.

In a specific operation, one small thin tube can be communicated with one lead discharging hole 41 to facilitate lead water discharging through the small thin tube, and the other lead discharging hole 41 is reserved to prevent one lead discharging hole 41 from being blocked and prevent the other lead discharging hole 41 from being used.

Because the proportion of lead is great, refractory brick has been laid to the interior bottom of smelting furnace 1, the carbon brick has been laid to the top, high-alumina brick has been laid on the carbon brick, collecting vat 42 is located smelting furnace 1 below, and with can accept the lead water of smelting furnace 1 bottom whereabouts, the molten iron is the state of semi-liquid semi-solid, the lower part is solid-state, the upper portion is liquid, the lead liquid permeates from the molten iron of semi-liquid semi-solid, pass solid-state molten iron, and pass the gap of refractory brick and carbon brick, arrive in collecting vat 42, the one end both sides of collecting vat 41 are equipped with 2 and arrange lead hole 41, can supply the interior lead water of collecting vat 42 to pass, discharge collecting vat 42 outside at last, can make the lead water automatic outflow, the iron level is in smelting furnace 1 above the lead water this moment, then the molten iron can not automatic outflow. Lead is discharged from the lead water periodically through the lead discharge holes 41, and the discharged lead water is cast into lead blocks in time.

Referring to fig. 1 to 4, a smelting furnace 1 includes a furnace body 11, a high-temperature air pipe 12 and a waste gas outlet pipe 13, the furnace body 11 is horizontally laid in a blind hole 5 arranged under the ground, the lower part of the furnace body 11 is buried under the ground, and the upper part of the furnace body 11 is located above the ground; the high-temperature air pipes 12 are arranged on two sides of the smelting furnace 1, communicated into the smelting furnace 1 and communicated with a high-temperature air source, and used for conveying high-temperature air into the smelting furnace 1 through the high-temperature air pipes 12; waste gas exit tube 13 is a plurality of, all locates 1 upper ends of smelting furnace and communicates to in the smelting furnace 1, and the waste gas that produces in the smelting furnace 1 passes through waste gas exit tube 13 and gets into waste gas waste heat recovery system, and discharge to reach standard after cooling, dust removal. Because the slope setting of furnace body 11 then enables the material free flow in furnace body 11, be convenient for produce the product of expectation after the reaction, and compare in blast furnace operation, can carry out abundant smelting to iron ore.

In this embodiment, high temperature air is blown into the furnace body 11 through the high temperature air pipe 12, oxygen is contained in the air, the reaction of the material can be accelerated, the high temperature air has a certain pressure, and the high temperature air is input into the furnace body 11 through the high temperature air pipe 12, so that the function of combustion-supporting and preheating of the air in the furnace body 11 can be achieved, and the gas generated in the reaction in the furnace body 11 can be discharged from the exhaust gas outlet pipe 13.

As a specific implementation manner of the iron ore smelting device containing lead and zinc provided by the present invention, please refer to fig. 1 to 4, the smelting furnace 1 along the direction from the feeding port 6 to the discharging port 7 is sequentially divided into the reaction zone 111, the transition zone 112 and the slag-iron separation zone 113, the bottom of the reaction zone 111 is disposed under the ground and has a long-strip trough structure, the material entering into the smelting furnace 1 reacts in the reaction zone 111, the feeding port 6 is located at the feeding end of the reaction zone 111, and the lead discharging mechanism 4 is disposed at the bottom of the reaction zone 111; the bottom of the transition area 112 is arranged under the ground and is in a curved arc groove type structure, the material in the reaction area 111 flows into the transition area 112, and the lead discharging mechanism 4 is arranged at the bottom of the transition area 112; the bottom of the slag-iron separation zone 113 is arranged under the ground and is of a long-strip groove-shaped structure, molten iron and slag generated in the reaction flow to the slag-iron separation zone 113 through the transition zone 112, the slag and the iron are separated in the slag-iron separation zone 113, the discharge port 7 is positioned at the discharge end of the slag-iron separation zone 113, the two ends of the transition zone 112 are respectively in arc transition connection with the reaction zone 111 and the slag-iron separation zone 113, and the lead discharging mechanism 4 is arranged at the bottom of the slag-iron separation zone 113.

The bottom of the reaction zone 111, the transition zone 112 and the slag-iron separation zone 113 is provided with a groove structure, which is convenient for the reaction and flow of the material, the furnace body 11 belongs to the smelting furnace 1 in the prior art, and has various functions of the smelting furnace 1 in the prior art, so that the details are not repeated herein.

Specifically, 80% of the smelting reaction progress is completed in the reactor, 20% of the smelting reaction progress and part of the slag-iron separation function are completed in the transition zone 112, the separation of slag from metals such as iron and the like is completed in the slag-iron separation zone 113, and the molten lead is placed at the bottom of the smelting furnace 1 and is also completed in the slag-iron separation zone 113.

The width of the reaction zone 111 is 3 meters, the total length is 7-8 meters, the dry balls enter the furnace body 11 from the feeding hole 6, the dry balls flow to the transition zone 112 and the slag-iron separation zone 113 while reacting, and 80% of smelting reaction progress is completed in the reaction zone 111; the slag-iron separation zone 113 has a width of 1 meter and a total length of 5-6 meters, and is used for separating high boiling point metals such as smelted iron and slag by gravity, and evaporating and separating low boiling point metals such as smelted zinc and the like from the slag; the transition zone 112 is a connecting area of the reaction zone 111 and the slag-iron separation zone 113, is of a curved-arc groove-shaped structure, realizes a transition function, the width of the transition zone 112 is changed from wide to narrow, and the transition zone 112 bears 20% of smelting reaction progress and part of slag-iron separation function. There is no clear boundary between the reaction zone 111 and the transition zone 112, nor between the transition zone 112 and the slag iron separation zone 113, which is dependent on operating conditions, throughput, dry-ball metallurgical properties, etc.

Capacity of the smelting furnace 1: dry balls containing 25-40% of carbon and 35-45% of iron (after carbon is subtracted, the content of pure iron) 15-25 t/h.

As a specific embodiment of the iron ore smelting device containing lead and zinc provided by the present invention, please refer to fig. 1 to 4, the reaction zone 111, the transition zone 112 and the slag-iron separation zone 113 buried underground are all trough-type structures, the arch-type structures leaking out of the reaction zone 111, the transition zone 112 and the slag-iron separation zone 113 on the ground are adapted to the trough-type structures, and the arch-type structures and the trough-type structures are mutually butted and fastened to form an integral body and the inside is hollow.

For the sake of safety, the furnace body 11 is divided into an upper part and a lower part, i.e. an overground part and an underground part, the interior of the furnace body 11 is hollow, under normal operation, the highest liquid level of slag is 200-400mm below the ground level, and the arch structure and the trough structure (the upper part and the lower part) of the furnace body 11 are covered and buckled together to form a whole body for the iron ore to react in the interior of the furnace body 11.

The width of the reaction zone 111 is 2-3 times the width of the slag iron separation zone 113. In this embodiment, the ratio of the width of the reaction zone 111 to the width of the slag-iron separation zone 113 is more than 2 times, which can satisfy the smelting requirement of the furnace body 11 for iron ore, and therefore, the present invention is within the protection scope of the present invention.

As a specific implementation manner of the iron ore smelting device containing lead and zinc provided by the utility model, please refer to fig. 1 to 4, the feed inlet 6 is provided with the oxygen pumping component 8 for pumping oxygen into the smelting furnace 1, and the air of the furnace body 11 is preheated in a combustion-supporting manner after pumping oxygen, so that the internal temperature of the furnace body 11 is kept balanced. Oxygen is conveyed into the furnace body 11 through the high-temperature air pipe 12, so that combustion-supporting preheating of air in the furnace body 11 is facilitated, and the temperature of the air in the furnace body 11 is kept constant. The oxygen pumping assembly 8 comprises an oxygen conveying pipeline communicated with the oxygen source and the feed port 6, an air pump arranged on the oxygen conveying pipeline and an air valve arranged on the oxygen conveying pipeline and positioned between the air pump and the feed port 6. Oxygen is conveyed to the interior of the furnace body 11 through the conveying pipeline, so that combustion-supporting preheating of air in the furnace body 11 is facilitated, and the air in the furnace body 11 is kept constant.

The number of the high-temperature air pipes 12 is 3-10, and the heat quantity needing to be supplemented in the reaction zone 111 is the largest, especially in the inlet area of the dry pellets from the analysis of heat balance, so that the number of the high-temperature air pipes 12 is the largest on the side of the feed inlet 6 of the dry pellets, and the high-temperature air pipes are matched with the oxygen pumping assembly 8 to operate, so that oxygen and high-temperature hot air can be supplemented into the furnace body 11, the temperature in the furnace body 11 is kept stable, and the temperature of 1400-1700 ℃ is ensured on the side of the feed inlet 6 of the dry pellets; in addition, the number of the waste gas outlet pipes 13 is 2-5, and the waste gas outlet pipes are uniformly distributed at the top of the furnace body 11.

As a specific embodiment of the iron ore smelting device containing lead and zinc provided by the present invention, please refer to fig. 1 to 4, the feed inlet 6 is located at one end of the smelting furnace 1 with shallow burial depth, and the discharge outlet 7 is located at one end of the smelting furnace 1 with deep burial depth. Be the furnace body 11 that the slope form set up through ground for the material in the furnace body 11 can move from 6 side direction discharge gates 7 sides of feed inlet in the reaction process, when the material moved discharge gates 7 sides, can become sediment and molten iron, so that carry out the separation of sediment iron, also be convenient for lead water simultaneously can discharge through row lead mechanism 4.

In this embodiment, a temperature sensor 9 for monitoring the reaction temperature is disposed in the furnace body 11, a display 10 is disposed outside the furnace body 11, the temperature sensor 9 is electrically connected to the display 10, and the current temperature inside the furnace body 11 can be observed on the display 10. The current temperature in the furnace body 11 can be detected through the temperature sensor 9, and whether the furnace body 11 is in a normal working state or whether a fault is detected or not can be judged by observing the current temperature.

In this embodiment, an infrared imager 110 is disposed at the top of the inner side of the furnace body 11, and the infrared imager 110 is used for collecting images during the reaction process in the furnace body 11. Through infrared imaging appearance 110, can regularly or regularly shoot the image in the inside reaction process of furnace body 11, watch the image order to the staff observes reaction process etc. and specifically, for dismantling the connection between infrared imaging appearance 110 and the furnace body 11.

As a concrete implementation mode of the iron ore smelting device containing lead and zinc provided by the utility model, please refer to fig. 1 to 4, the smelting furnace 1 comprises a shell made of thick steel plates and refractory bricks laid on the inner wall of the shell, and the shell is hollow and can be used for smelting operation. The outer shell of the smelting furnace 1 is made of high-temperature-resistant manganese steel plates, and is lined with refractory materials.

The reaction of iron ore in the furnace body 11 can be realized only by a certain theoretical support, or can be understood as the working principle of the smelting furnace 1:

crushing and screening lead-zinc-containing iron ore (with iron grade of about 35%) to obtain ore powder with particle size of below 25mm, grinding the ore powder into ore powder with grade of-200 meshes by using a ball mill, carrying out strong magnetic separation or gravity separation on the ore powder to improve the iron grade to above 45%, and drying to obtain concentrate powder; crushing and grinding the quicklime and the coal powder into fine powder; mixing concentrate powder with other raw materials such as coal powder and quicklime, pelletizing, drying, preheating and the like to prepare dry pellets, smelting the dry pellets in a strip-shaped smelting furnace 1 to obtain molten lead, molten silver and the like which have low solubility in molten iron and have higher specific gravity than the molten iron and better penetrating power, and casting the molten lead, the molten silver and the like into lead ingots in time after passing through a refractory material gap at the bottom of a furnace, entering a collecting tank 42 through a lead discharging hole 41, and periodically discharging the molten lead through the lead discharging hole 41; and (5) obtaining a zinc oxide crude product through a dust removal collection system.

The index requirement is as follows: the iron content (after carbon removal) is 35-45%, the binary alkalinity CaO/SiO2 is 0.85-0.95, the ternary alkalinity (CaO + MgO)/(SiO2+ Al2O3) is 0.8-0.95, and the carbon content is 25-40%.

The following is the supplementary explanation of the utility model:

the groove structure of the reaction zone 111 is to ensure that the dry balls with the particle size of 30mm-80mm stay in the furnace body 11 for 7-14 minutes, the dry balls are subjected to redox reaction under the condition of isolating air below a slag layer, the dry balls are subjected to surface reaction preferentially at high temperature, the interior of the dry balls also starts to react along with the rise of the temperature in the balls and a certain raised temperature, carbon is gradually lost in the reaction process, holes are formed on the surfaces and the interior of the balls, and a large amount of CO and CO2 gas generated by the reaction accelerates the breakage of the dry balls, so that a violent stirring effect can be generated on the slag layer, the slag is in a boiling state, the iron oxide is gradually reduced into ferrous oxide and iron, the reduction of the iron oxide along with the loss of the carbon is realized, the specific gravity of the broken small balls is larger and larger, the reaction speed is high, and most of the dry balls can be reduced within minutes.

The specific gravity of high boiling point metals such as smelted molten iron is far greater than that of slag, the high boiling point metals such as the smelted molten iron are separated from the slag by virtue of gravity, a certain separation time is also needed, the separation time is controlled according to the retention time of 2-4 minutes, and the slag-iron separation is started in the reaction zone 111 and the transition zone 112, so that the design time of the slag-iron separation zone 113 is short; the iron wrapped in the slag is slightly disturbed to a certain extent, which is beneficial to slag-iron separation, so that the width of the slag-iron separation zone 113 is properly reduced, and the proper disturbance degree of the slag can be improved.

The low boiling point metals such as zinc and the like are evaporated into gas in the slag and separated from the slag.

The utility model is suitable for a smelt the iron content solid waste material of low boiling point metal such as zinciferous, remedied the unsuitable defect of smelting solid iron ore such as zinciferous of blast furnace, belong to a supplementary technique of blast furnace smelting technique.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A lead-zinc containing iron ore smelting device is characterized by comprising:

the smelting furnace is in a long strip shape, is horizontally laid in a blind hole arranged below the ground, the lower part of the smelting furnace is positioned below the ground, an included angle is formed between the bottom surface of the smelting furnace and the horizontal plane, a feeding hole and a discharging hole are respectively formed in two ends of the smelting furnace, and the smelting furnace is used for smelting iron ore containing lead and zinc and producing lead water, molten iron and crude zinc oxide;

the feeding mechanism is arranged on the side of the feeding port and used for conveying lead-zinc-containing iron ore into the smelting furnace;

the discharging mechanism is arranged on the side of the discharging opening and is used for receiving the molten iron and the liquid slag produced from the smelting furnace; and

and the lead discharging mechanism is arranged at the bottom of the smelting furnace and is used for discharging lead water produced in the smelting furnace.

2. The lead-zinc containing iron ore smelting plant according to claim 1, wherein the feeding mechanism includes:

the weighing platform is used for weighing the weight of the iron ore to be fed into the smelting furnace;

the storage bin is used for containing iron ores, and the weighed iron ores are temporarily stored in the storage bin; and

and the feeding pipeline is obliquely arranged, one end of the feeding pipeline is communicated with the storage bin, the other end of the feeding pipeline is connected with the feeding hole, and the iron ore in the storage bin is conveyed into the smelting furnace through the feeding pipeline.

3. The lead-zinc containing iron ore smelting plant according to claim 1, wherein the discharging mechanism includes:

the slag avoiding device is communicated with the discharge hole and is used for receiving the output molten iron and the liquid slag, and the slag avoiding device is used for separating the molten iron and the liquid slag;

the molten iron ditch is communicated with the output end of the slag avoiding device, and the molten iron flows to the molten iron ditch after being separated by the slag avoiding device; and

and the slag runner is communicated with the output end of the slag avoiding device, and after the slag avoiding device separates the liquid slag, the liquid slag flows to the slag runner.

4. The smelting device of iron ore containing lead and zinc according to claim 1, wherein the lead discharging mechanism comprises:

the collecting tank is transversely arranged below the smelting furnace and used for collecting the lead water permeated from brick seams at the bottom of the smelting furnace, and the collecting tank is in a straight shape; and

and 2 lead discharging holes are formed in the two opposite side surfaces of one end of the collecting tank, communicated to the inside of the collecting tank and used for discharging lead water in the collecting tank.

5. The lead-zinc containing iron ore smelting plant according to claim 1, wherein the smelting furnace includes:

the furnace body is horizontally laid in a blind hole arranged below the ground, the lower part of the furnace body is buried below the ground, and the upper part of the furnace body is positioned above the ground;

the high-temperature air pipes are arranged on two sides of the smelting furnace, communicated into the smelting furnace and communicated with a high-temperature air source, and the high-temperature air source conveys high-temperature air into the smelting furnace through the high-temperature air pipes; and

the waste gas exit tube is a plurality of, all locates smelting furnace upper end and intercommunication to in the smelting furnace, the waste gas that produces in the smelting furnace passes through the waste gas exit tube gets into waste gas waste heat recovery system, discharges up to standard after cooling, dust removal.

6. The lead-zinc containing iron ore smelting device according to claim 5, wherein along the direction from the feeding port to the discharging port, the smelting furnaces are divided into:

the bottom of the reaction zone is arranged under the ground and is of a long-strip groove-shaped structure, materials entering the smelting furnace react in the reaction zone, the feed inlet is positioned at the feed end of the reaction zone, and the lead discharging mechanism is arranged at the bottom of the reaction zone;

the bottom of the transition region is arranged under the ground and is in a curved arc groove type structure, the material in the reaction region flows into the transition region, and the lead discharging mechanism is arranged at the bottom of the transition region; and

the ground is arranged in to sediment iron disengagement zone, and the bottom is arranged in and is rectangular cell type structure, and the molten iron and the sediment that produce in the reaction pass through the transition zone flow extremely the sediment iron disengagement zone sediment and iron, zinc separation in the sediment iron disengagement zone, the discharge gate is located the discharge end of sediment iron disengagement zone, the transition zone both ends circular arc transition respectively accepts the reaction zone with sediment iron disengagement zone, arrange plumbous mechanism and locate sediment iron disengagement zone bottom.

7. The device for smelting the iron ore containing lead and zinc according to claim 6, wherein the reaction zone, the transition zone and the iron slag separation zone buried underground are all trough-shaped structures, the reaction zone, the transition zone and the iron slag separation zone leaked out of the ground are arch-shaped structures matched with the trough-shaped structures, the arch-shaped structures and the trough-shaped structures are mutually butted and buckled to form a whole, and the insides of the arch-shaped structures and the trough-shaped structures are hollow.

8. The lead-zinc containing iron ore smelting plant according to claim 5, wherein the feed inlet is provided with an oxygen pumping assembly for pumping oxygen into the smelting furnace.

9. The smelting device for lead-zinc containing iron ore according to claim 6, wherein said feeding port is located at the end of said smelting furnace where the burial depth is shallow, and said discharging port is located at the end of said smelting furnace where the burial depth is deep.

10. The lead-zinc containing iron ore smelting plant according to claim 1, wherein the smelting furnace includes a shell made of thick steel plate and refractory bricks laid on the inner wall of the shell, and the interior of the shell is hollow.