WO2010137286A1 - 焼成装置 - Google Patents
焼成装置 Download PDFInfo
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- WO2010137286A1 WO2010137286A1 PCT/JP2010/003474 JP2010003474W WO2010137286A1 WO 2010137286 A1 WO2010137286 A1 WO 2010137286A1 JP 2010003474 W JP2010003474 W JP 2010003474W WO 2010137286 A1 WO2010137286 A1 WO 2010137286A1
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- Prior art keywords
- gas
- furnace body
- firing
- atmosphere
- unit
- Prior art date
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- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
- F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
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- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
- F27B9/021—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks
- F27B9/022—With two tracks moving in opposite directions
- F27B9/023—With two tracks moving in opposite directions with a U turn at one end
- F27B9/024—With two tracks moving in opposite directions with a U turn at one end with superimposed tracks
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- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/26—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers
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- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
Definitions
- the present invention relates to a firing apparatus for firing a powdery or granular object to be treated which is transported inside a furnace body.
- Firing is, for example, synthesis involving oxidation reaction or reduction reaction, removal of impurities, improvement of crystal structure, growth of particles with respect to a powdery or granular object to be treated composed of a metal material or an inorganic material. It is done for the purpose.
- a powdery or granular object to be treated is abbreviated as powder.
- Batch-type small furnaces are widely used in apparatuses for firing small amounts of powder on a laboratory scale.
- a large continuous transfer type furnace is widely used as an apparatus for firing a large amount of powder continuously.
- the continuous transfer type devices are classified into several types according to the powder transfer method.
- a typical example of an apparatus for directly transporting powder is a rotary calcining furnace.
- the rotary firing furnace rotates a cylindrical furnace core tube.
- the powder can be fired and conveyed while being stirred inside the furnace core tube.
- a rotary calciner is suitable for uniformly applying heat to the powder.
- the surface of the metal core tube may be corroded and peeled off, and the peeled object may be mixed in the powder as an impurity.
- a method of preventing the mixing of the impurities there is a method of frequently replacing the furnace core tube, a method of covering the surface of the furnace core tube with an inert metal such as platinum, or a ceramic.
- these methods have the problem that the cost for the furnace core tube becomes very high.
- a method of making the material of the furnace core tube itself into a ceramic can be considered.
- the powder when the corrosiveness of the powder is high, the powder is loaded on a box-shaped or plate-shaped loading member made of ceramics having corrosion resistance, and the loading member loaded with the powder is transported Methods are widely used.
- a conveyance medium of the loading member a hydraulic pusher (pusher furnace), a conveyor of ceramic rollers (roller hearth furnace), a conveyor of metal mesh belt (mesh belt furnace) or the like is used (see, for example, Patent Document 1).
- the atmosphere gas is uniformly brought into contact with all the objects to be treated. This is to uniformly bake all objects to be treated.
- FIG. 9 is a cross-sectional view showing the structure of the conventional baking apparatus described in Patent Document 2. As shown in FIG. Specifically, FIG. 9 shows a cross section of the furnace body 3 cut along a plane perpendicular to the transport direction of the loading member 2 loaded with the object 1. The conveying direction of the loading member 2 is the direction perpendicular to the paper surface of FIG. As shown in FIG. 9, in the firing apparatus, a plurality of loading members 2 loaded with the objects to be treated 1 are stacked in multiple stages in the height direction of the furnace body 3 and simultaneously transported.
- an air supply pipe 4 for ejecting atmosphere gas toward the loading member 2 is embedded in the side wall of the furnace body 3, and the gas injection port 5 which is one end of the air supply pipe 4 is of the side wall of the furnace body 3. It is arranged inside. Therefore, the atmosphere gas supplied to the air supply pipe 4 outside the furnace body 3 is spouted from the gas spout 5 disposed on one inner side surface of the furnace body 3, and the mounting surface on which the workpiece 1 is loaded Flow along.
- the baking apparatus controls the supply amount of the atmosphere gas so that the flow velocity of the atmosphere gas ejected from one inner side surface of the furnace body 3 does not become zero depending on the place.
- a major problem in continuous firing of objects to be treated loaded on a box-shaped or plate-like loading member is the occurrence of differences in firing state (firing unevenness) at different locations.
- the firing unevenness occurs because the condition of heat applied to the object to be treated and the condition of contact between the atmosphere gas and the object to be treated required for the reaction of the object to be treated differ depending on the location.
- excessive firing unevenness causes performance deterioration of various products manufactured using the fired object to be treated. Therefore, there is a strong demand to suppress firing unevenness.
- a plurality of loading member rows along the transport direction of the loading members are arranged in a direction orthogonal to the transport direction of the loading members, and a plurality of loading members arranged in multiple rows at the same time It is widely carried out.
- the gas jet port is disposed on one of the inner side surfaces of the furnace body facing in the direction orthogonal to the transport direction of the loading member.
- the objects to be treated in a row near the jet nozzle sequentially come into contact with the atmosphere gas and react. Therefore, the composition of the atmosphere gas and the flow rate change as the distance from the gas outlet increases.
- An object of this invention is to provide the baking apparatus which can implement
- the firing apparatus of the present invention has an internal space, and a furnace body in which powder or granular objects to be treated are sintered in the internal space, and an internal space of the furnace body.
- a gas ejection portion having an opening for ejecting an atmosphere gas from above the object to be processed, a gas supply portion for supplying the atmosphere gas from the side wall of the furnace body to the gas ejection portion, and the inside of the furnace body
- a heating unit that controls the temperature distribution of the space.
- the gas injection portion is in the form of powder or particles transferred in the internal space of the furnace body. Since the atmosphere gas is ejected from above the object to be treated and the gas supply unit supplies the atmosphere gas from the side wall of the furnace to the gas ejection unit, a large amount of atmosphere gas is supplied so that ample atmosphere gas spreads to all locations. It is possible to suppress firing unevenness without supplying it. Furthermore, the height of the furnace body can be reduced. Therefore, even if the furnace body is stacked in multiple stages, the height of the baking apparatus can be suppressed.
- FIG. 1 (b) is a vertical sectional view of the baking apparatus according to the first embodiment of the present invention, taken along the conveying direction of the loading member on which the powder is loaded. It is a figure which shows an example of the cross section cut
- FIG 8 (b) is a vertical sectional view of the baking apparatus according to the second embodiment of the present invention, taken along the conveying direction of the loading member on which the powder is loaded. It is a figure which shows an example of the cross section cut
- Embodiment 1 1 (a) and 1 (b) are cross-sectional views showing an example of the configuration of a baking apparatus according to Embodiment 1 of the present invention. More specifically, FIG. 1 (a) is a cross section of the furnace body cut along a plane perpendicular to the conveyance direction of the loading member on which powder is loaded, and FIG. 1 (b) is the conveyance direction of the loading member on which powder is loaded. The cross section which cut
- the firing device fires the powder 11 in the internal space of the furnace body 13.
- the loading member 12 is transported.
- the loading member 12 is loaded with the powder 11.
- the loading member 12 is transported in the horizontal direction by rotation of the plurality of transport rollers 14 installed along the horizontal direction. Accordingly, the upper side of the plurality of transport rollers 14 juxtaposed is the transport path of the loading member 12.
- the horizontal direction is the left-right direction in the drawing of FIG.
- the loading member 12 is transported from the left to the right in FIG. 1 (b) and from the front to the back in FIG. 1 (a) along the transport direction 15 indicated by the arrow in FIG. 1 (b).
- the conveyance roller 14 is connected to the conveyance controller 16 as shown in FIG. 2, and the rotation operation of the conveyance roller 14 is controlled by the conveyance controller 16. Further, the conveyance controller 16 is connected to the control device 17, and the control device 17 controls a target value and the like of the number of rotations of the conveyance roller 14.
- the height of the furnace body 13 in the vertical direction is 700 mm
- the width in the vertical direction of the furnace body 13 and the lateral direction perpendicular to the conveying direction 15 is 1800 mm.
- the length along the conveyance direction 15 of each zone mentioned later was 1500 mm, respectively.
- the size is not limited to this, and the size is set to an appropriate size according to the processing amount of the powder 11.
- each loading member 12 may be arranged along the transport direction 15 and may be transported continuously. In this way, each powder 11 loaded on each loading member 12 continuously transported along the transport direction 15 can be fired continuously.
- the loading members 12 can be arranged at regular intervals or without gaps in order to avoid collision of the loading members.
- FIG. 1A shows the case where three loading members 12 are juxtaposed in the lateral direction orthogonal to the transport direction 15.
- the lateral direction is the left-right direction in the drawing of FIG.
- the three loading members 12 juxtaposed in the lateral direction can be simultaneously transported.
- the powders 11 loaded on the loading members 12 juxtaposed in the lateral direction can be fired simultaneously. Therefore, according to the baking apparatus of this embodiment, a plurality of rows of the loading members 12 along the transport direction 15 are arranged in the lateral direction orthogonal to the transport direction 15 to form a plurality of the rows forming the three rows
- the members 12 can be transported simultaneously and continuously.
- the gas introduction mechanism introduces an atmosphere gas necessary for a desired chemical reaction from the side wall 13 c of the furnace body 13 to the internal space of the furnace body 13.
- the gas introduction mechanism includes the air supply pipe 18, the atmosphere gas supply source 19 for supplying the atmosphere gas to the air supply pipe 18, and the flow rate of the atmosphere gas supplied from the atmosphere gas supply source 19 to the air supply pipe 18. It comprises a gas flow rate adjustment unit 20 to be controlled and a gas injection unit 21 provided in the air supply pipe 18. As shown in FIG.
- the atmosphere gas supply source 19 and the gas flow rate adjustment unit 20 are respectively connected to the control device 17, and the gas supply operation by the atmosphere gas supply source 19 and the gas flow rate adjustment unit
- the flow control operation of the atmosphere gas by 20 is controlled.
- a regulator, a damper, a fan or the like can be used for the gas flow rate adjustment unit 20.
- the air supply pipe 18 as the gas supply portion penetrates the furnace body 13 in the lateral direction.
- the position of the air supply pipe 18 inside the furnace body 13 is above the transport path of the loading member 12, and the air supply pipe 18 supplies an atmosphere gas from the side wall 13 c of the furnace body 13 to the gas injection portion 21.
- the air supply pipe 18 is connected to the atmosphere gas supply source 19 outside the furnace body 13.
- a gas flow rate adjusting unit 20 is interposed in the air supply pipe 18 outside the furnace body 13.
- a plurality of gas jet parts 21 are provided on the side surface of the air supply pipe 18 inside the furnace body 13.
- the gas ejection part 21 ejects the atmosphere gas from above the powder 11 transported in the internal space of the furnace body 13.
- the gas ejection part 21 is an opening formed on the side surface of the air supply pipe 18, and the atmosphere gas is ejected from the opening.
- the gas ejection part 21 disposed inside the furnace body 13 ejects the atmosphere gas in the gas ejection direction 22 crossing in the conveyance direction 15. Therefore, the atmosphere gas supplied from the outside of the furnace body 13 to the gas jet part 21 through the air supply pipe 18 is jetted from the gas jet part 21 toward the powder 11 loaded on the loading member 12.
- gas ejection direction 22 An example of the gas ejection direction 22 is shown by an arrow in FIG. 1 (b).
- the gas ejection direction 22 is set so that the angle between the perpendicular line of the imaginary surface 23 and the gas ejection direction 22 and the same height as the surface layer surface of the powder 11 is 45 °.
- the distance between the virtual surface 23 and the gas ejection part 21 was 70 mm.
- FIG. 3 is a view showing the air supply pipe 18 in detail.
- six circular gas injection portions (openings) 21a, 21b, 21c, 21d, 21e and 21f are provided at a pitch of 160 mm on the side surface of the air supply pipe 18 inside the furnace body 13. .
- the shape of the air supply pipe 18 was made into cylindrical shape, and the internal diameter of the cylinder was 30 mm.
- the diameter of the gas jet parts (openings) 21a and 21f located on the outermost side is 13 mm, and the diameter of the gas jet parts (openings) 21b and 21e located on one inside
- the diameter of the gas jet parts (openings) 21c and 21d located at the innermost side was 9 mm. That is, the area was set smaller as the gas ejection portion (opening) 21 located inward. According to this structure, when the atmosphere gas having the same flow rate is supplied from both ends of the air supply pipe 18, it is possible to reduce the variation in the flow rate of the atmosphere gas jetted from the gas jet parts 21a to 21f.
- This firing apparatus is configured such that an atmosphere gas is satisfied which satisfies any one of the following conditions 1 to 4 in each of the plurality of gas injection parts 21a to 21f.
- the flow rate of the atmosphere gas supplied to the air supply pipe 18, the cross-sectional area of the inner hole of the air supply pipe 18, the area of the gas injection part (opening) 21, the arrangement of the air supply pipe 18 and the gas injection part 21, the gas injection direction 22 Etc. are set such that any one of the following conditions 1 to 4 is satisfied.
- H / cos ⁇ is It will be 100 mm.
- the area S of the gas jet portions 21b and 21e having a diameter of 11 mm among the gas jet portions illustrated in FIG. 3 is 95 mm 2 .
- the atmosphere gas is supplied to the air supply pipe 18 so that the atmosphere gas is ejected from the gas ejection parts 21b and 21e at a flow rate Q of 6 liters / min, ie, 100,000 mm 3 / s, the atmosphere ejected from the gas ejection parts 21b and 21e
- the flow velocity U at the virtual surface 23 of the gas is 280 mm / s. This almost agrees with the measured value.
- the critical friction velocity Uc can be determined by the following known equation.
- Uc A ⁇ ⁇ D p ⁇ g ⁇ ( ⁇ p ⁇ a ) / ⁇ a ⁇ 0.5
- D p is the particle diameter of the powder [m]
- g is the gravitational acceleration [m / s 2 ]
- ⁇ p is the powder density [kg / m 3 ]
- ⁇ a is the density of the atmosphere gas [kg / m m 3 ].
- Laser diffraction particle size distribution measurement can be used to measure the particle size.
- a median diameter can be used for particle size evaluation.
- A is a proportional constant, and the value differs depending on the type of powder and the state of bonding between adjacent particles, and can be separately obtained by experiments.
- metal powder is used as the powder, and oxygen is used as the atmosphere gas.
- D p is 1 ⁇ 10 -5 m
- ⁇ p is 4500 kg / m 3
- [rho a is 0.36kg / m 3
- A is a 0.4
- the critical friction velocity Uc is 440 mm / s.
- g is 9.8 m / s 2 .
- the flow velocity U is 280 mm / s for the gas jet portions 21b and 21e having a diameter of 11 mm described above, and the critical friction velocity Uc is not exceeded, so that the atmosphere gas jet satisfying the above conditions can be executed.
- the area of the ejection portion (opening) 21, the arrangement of the air supply pipe 18 and the gas ejection portion 21, the gas ejection direction 22 and the like are set.
- the concentration of the atmosphere gas in contact with the powder 11 can be improved even if the gas supply amount is small compared to the case where the gas jet portion 21 is disposed on the side wall 13 c or the lower wall 13 b of the furnace body 13. Therefore, it is possible to reduce the cost of purchasing the atmosphere gas and generating the atmosphere gas.
- the flow velocity U of the atmosphere gas in the virtual surface 23 decreases as the distance H between the virtual surface 23 having the same height as the surface layer surface of the powder 11 and the gas ejection portion 21 is set longer. Therefore, the longer the distance H is set, the easier it is to satisfy any one of the conditions 1 to 4 described above. However, as the distance H is set longer, the internal space of the furnace body 13 is expanded, and the supply amount of the atmosphere gas necessary for the firing is also increased. Therefore, the cost for purchasing the atmosphere gas, the cost for generating the atmosphere gas, and the energy cost for heating the atmosphere gas in the furnace are increased. In order to prevent this, it is desirable that the distance H be 300 mm or less, more preferably 200 mm or less.
- the configuration of the air supply pipe 18 is not limited to the configuration shown in FIG. 3, and the arrangement, the number, etc. of the gas ejection sections 21 are the number and arrangement of the loading members 12 to be transported, the amount of powder 11 to be loaded, etc. Set as appropriate according to
- the atmosphere gas may be supplied only from one end of the air supply pipe 18.
- the area of the gas injection portion (opening) 21 is set smaller as the distance from the gas supply end is increased. This makes it possible to reduce the variation in the flow rate of the atmosphere gas jetted from the gas jet unit 21.
- the shapes of the air supply pipe 18 and the opening for gas ejection provided to the air supply pipe 18 are limited thereto.
- a square air supply pipe or a square opening may be used.
- the gas injection part 21 is an opening provided on the side surface of the air supply pipe 18
- the invention is not limited thereto.
- the gas injection part may be a branch pipe branched from the air supply pipe. In this case, for example, an opening is provided at the tip of the branch pipe.
- the above conditions can be applied unless the shape of the opening from which the atmosphere gas spouts is very specific.
- a spiral shape or a bowl shape can be mentioned.
- three stacking members 12 are juxtaposed in the lateral direction (left and right direction in the drawing of FIG. 1A) orthogonal to the transporting direction 15, and the stacking members 12 are simultaneously transported.
- the number of the loading members 12 juxtaposed in the lateral direction is not limited as long as uniform gas ejection can be performed in the lateral direction while satisfying any of the conditions 1 to 4 described above.
- Productivity increases as the number of rows increases, but the installation space of the device increases, and the degree of difficulty of transportation and the degree of difficulty of performing uniform gas ejection in the lateral direction also increase.
- the plurality of gas jetting portions include ones having different opening areas
- the plurality of gas jetting portions 21 and the atmosphere of the gas jetting portions 21 are described. While providing the air supply pipe
- the structure which provided two gas ejection parts 21 was shown in FIG. 4, of course, three or more gas ejection parts can also be provided.
- FIG. 5 is a view schematically showing an example of a configuration capable of controlling the gas component mixing ratio. Specifically, FIG. 5 shows a configuration capable of controlling the mixing ratio of two types of gas components.
- a gas cylinder 19a and a gas cylinder 19b for separately storing gas A and gas B are provided as an atmosphere gas supply source, and those gas cylinders
- the gas flow rate adjustment units 20a and 20b may be provided for each of 19a and 19b.
- the gas cylinders 19a and 19b are connected to the air supply pipe 18 branched off halfway through the gas flow rate adjustment units 20a and 20b.
- the gas flow rate adjusting units 20a and 20b can adjust the mixing ratio of the gas components as well as adjusting the flow rate of the atmosphere gas supplied to the air supply pipe. Therefore, a gas component adjustment part is comprised by these two gas flow rate adjustment parts 20a and 20b.
- the atmosphere gas supply source is not limited to the gas cylinder, and may be, for example, a gas generator. Also, as a matter of course, the atmosphere gas is not limited to one composed of two kinds of gases.
- the configuration in which the gas flow rate adjustment units 20a and 20b are provided for each atmosphere gas supply source that supplies each gas component is not limited to the configuration in which the air supply pipe 18 penetrates in the lateral direction of the furnace body 13,
- the present invention can also be applied to a configuration in which the air supply pipe 18 is provided for each ejection portion 21.
- the loading member 12 will be described.
- a box-shaped container having a square bottom is used as the loading member 12, but it goes without saying that the shape of the loading member 12 is particularly limited. Instead, for example, a cylindrical box-shaped container, a plate-like container without a border, or the like can be used.
- a box-shaped container with a margin when the flowability of the powder is high, it is desirable to use a box-shaped container with a margin. This is because, in the plate-like loading member 12 without a margin, the amount of powder that can be loaded on one loading member is limited and productivity is reduced.
- alumina ceramic is used as the material of the loading member 12 and the air supply pipe 18, but it is needless to say that any ceramic that satisfies the operating temperature conditions may be used, such as zirconia ceramic, SUS or Inconel. It is also possible to use metal or the like. However, when the powder is highly corrosive, it is desirable to use a material having corrosion resistance. This is because the surfaces of the loading member 12 and the air supply pipe 18 may be corroded and peeled off by the loaded powder or the scattered powder, and the peeled object may be mixed in the powder 11 as an impurity.
- the heating unit makes the temperature distribution of the internal space of the furnace body 13 a temperature distribution according to the firing process.
- a plurality of upper heaters (first heaters) 24 a and lower heaters (second heaters) 24 b are provided as heating units, with the transport path of the loading member 12 interposed therebetween. More specifically, a plurality of pipe-like upper heaters 24a are arranged above the transport roller 14 (on the upper wall 13a side of the furnace body 13) along the transport direction 15, and similarly, the pipe-like lower heater 24b is a transport roller A plurality of pieces are arranged along the transport direction 15 below 14 (on the lower wall 13 b side of the furnace body 13).
- the upper heater 24a and the lower heater 24b are disposed so that the longitudinal directions of the upper heater 24a and the lower heater 24b are parallel to the lateral direction (left and right direction in the drawing of FIG. 1A) orthogonal to the transport direction 15. There is.
- the upper heater 24a and the lower heater 24b are installed such that the distance between the upper heater 24a and the loading member 12 and the distance between the lower heater 24b and the loading member 12 are equal. This is to achieve heat equalization in the vertical direction (front and back) of the loading member 12.
- the upper heater 24a and the lower heater 24b are respectively connected to the temperature controller 25a for the upper heater and the temperature controller 25b for the lower heater as shown in FIG. 2, and the upper heater 24a is connected by the temperature controllers 25a and 25b.
- An output adjusting unit is configured to individually control the output of the lower heater 24b, that is, the temperature.
- the temperature controllers 25a and 25b are connected to the control device 17, and the control device 17 controls target values and the like of the temperatures of the upper heater 24a and the lower heater 24b.
- the upper heater 24a and the lower heater 24b have the same shape, it is needless to say that the upper heater 24a and the lower heater 24b may have different shapes. Further, the upper heater 24a and the lower heater 24b may be embedded in, for example, the upper wall 13a and the lower wall 13b constituting the furnace body 13, respectively.
- an electric heater formed by housing a resistor in a pipe-shaped ceramic case is used as the upper heater 24a and the lower heater 24b, but the types of heating units (upper heater 24a, lower heater 24b)
- various heaters such as a panel-type electric heater and a gas-fired heater can be used.
- the heating unit (upper heater 24a and lower heater 24b) is that the heat uniformity in the lateral direction (left and right direction in the drawing of FIG. 1A) orthogonal to the transport direction 15 is high.
- a uniform temperature distribution may be obtained in the lateral direction with respect to the powder 11 by changing the density of the resistor in the ceramic case. Specifically, the density of the resistor in the ceramic case is changed so that the temperatures of the upper heater 24a and the lower heater 24b in the vicinity of the side wall 13c of the furnace body 13 where the temperature is likely to be reduced by heat radiation. In this way, temperature unevenness in the lateral direction orthogonal to the transport direction 15 can be suppressed, and firing unevenness can be suppressed.
- the heating portion may be along the lateral direction (left and right direction in FIG. 1A) orthogonal to the transport direction 15.
- the temperature may be controlled at each of a plurality of set points.
- FIG. 6 is a diagram schematically showing an example of a configuration capable of controlling the temperature for each of a plurality of places set along the lateral direction.
- FIG. 6 shows a configuration in which three points for controlling the temperature are provided in the lateral direction.
- three resistors 27 corresponding to the three points for controlling the temperature are provided in the pipe-shaped ceramic case 26 as the heater 24.
- a temperature controller 25 may be provided for each of the three resistors 27 using electric heaters arranged side by side.
- the temperature controller 25 provided for each of the three resistors 27 may execute the temperature control based on the signal from the temperature detector 28 provided at each position to control the temperature.
- a thermocouple or the like can be used as the temperature detector 28.
- temperature unevenness in the lateral direction orthogonal to the transport direction 15 can be suppressed, and firing unevenness can be suppressed.
- finer temperature control is possible as compared to the case where only the density of the resistor in the ceramic case is changed. Also in this case, the density may be varied among the resistors 27.
- heat insulating walls are used for the upper wall 13a above the upper heater 24a and the lower wall 13b below the lower heater 24b. Moreover, the heat insulation wall is used also for the side wall 13c which opposes the horizontal direction of the furnace body 13. As shown in FIG.
- the loading member 12 is transported by the rotation of the transport roller 14.
- the conveyance roller 14 has a thickness (strength) that can withstand the load of the loading member 12 on which the powder 11 is loaded.
- the transport rollers 14 are arranged at a pitch sufficiently shorter than the length of the loading member 12 along the transport direction 15 so that the loading member 12 does not fall.
- the transport rollers 14 are too thick or the pitch at which the transport rollers 14 are arranged is too short, heat transfer from the lower heater 24b to the loading member 12 will be impeded. It is desirable to set the pitch.
- the method of transporting the loading member 12 is not limited to the method of transporting the loading member by the rotation of the transport roller 14.
- a method of pushing the loading member on the roller with a hydraulic pusher, a conveyor of mesh belt Or the like is not limited to the method of transporting the loading member by the rotation of the transport roller 14.
- the gas ejection direction 22 is set so that ⁇ is 45 °, but of course the angle ⁇ is not limited to 45 °.
- the gas ejection direction 22 may be set such that the angle ⁇ is 0 °, and the atmosphere gas may be ejected perpendicularly to the surface layer surface of the powder 11.
- the gas ejection direction 22 is in the range of 0 ° ⁇ ⁇ ⁇ 90 °, and the atmosphere gas after ejection is the upper heater It is desirable to set so as not to collide with an obstacle such as 24a.
- the firing of the powder 11 proceeds by the contact between the jetted atmosphere gas and the powder 11 and the supply of heat from the upper heater 24 a and the lower heater 24 b to the powder 11.
- unnecessary gas is generated from the powder 11 by volatilization or chemical reaction of components contained in the powder 11.
- this unnecessary gas is retained in the furnace body, it is possible for the powder 11 to cause a reaction reverse to the desired chemical reaction. Therefore, the unnecessary gas needs to be exhausted outside the furnace together with the atmosphere gas.
- the gas exhaust mechanism of the baking apparatus exhausts the gas sucked into the gas suction portion 30 installed inside the furnace body 13 from the side wall 13 c of the furnace body 13 to the outside of the furnace body 13.
- the gas exhaust mechanism sucks the gas into the gas suction portion 30 through the exhaust pipe 29, the gas suction portion 30 provided in the exhaust pipe 29, and the exhaust pipe 29, and also to the gas suction portion 30.
- It consists of a gas displacement adjustment unit 31 that controls the flow rate of the gas to be sucked.
- the gas discharge amount adjustment unit 31 is connected to the control device 17, and the gas discharge operation of the gas discharge amount adjustment unit 31 is controlled by the control device 17.
- an exhaust fan or the like can be used for the gas exhaust amount adjustment unit 31.
- An exhaust pipe 29 as a gas discharge portion penetrates the furnace body 13 in the lateral direction, similarly to the air supply pipe 18.
- the position of the exhaust pipe 29 in the furnace 13 of the furnace body 13 is above the transport path of the loading member 12, and the exhaust pipe 29 sucks the gas sucked into the gas suction unit 30 from the side wall 13 c of the furnace 13. Discharge to 13 outside. Further, the exhaust pipe 29 is connected to the gas exhaust amount adjustment unit 31 outside the furnace body 13.
- a plurality of gas suction portions 30 for sucking the gas in the internal space of the furnace body 13 are provided on the side surface inside the furnace body 13 of the exhaust pipe 29.
- the gas suction unit 30 sucks gas from above the powder 11 transported in the internal space of the furnace body 13.
- the gas suction portion 30 is an opening formed on the side surface of the exhaust pipe 29, and the gas is sucked from the opening.
- the configuration and arrangement of the exhaust pipe 29 and the gas suction unit 30 are the same as the configuration and arrangement of the air supply pipe 18 and the gas ejection unit 21 so that the flow path of the atmosphere gas ejected from the gas ejection unit 21 becomes parallel to the transport direction 15. Match. Further, it is desirable to select the shape (including the shape of the opening of the gas suction portion 30) and the material of the exhaust pipe 29 and the gas suction portion 30 based on the same selection criteria as the air supply pipe 18 and the gas ejection portion 21.
- the exhaust pipe 29 is disposed opposite to the air supply pipe 18 in the direction opposite to the conveying direction 15, that is, above the left side of the drawing of FIG. 1 (b). Further, as in the case of the air supply pipe 18 shown in FIG. 3, a plurality of circular gas suction portions (openings) 30 are provided on the side surface of the cylindrical exhaust pipe 29. The plurality of gas suction portions 30 are provided at the same position as the plurality of gas jetting portions 21 in the horizontal direction (the left and right direction in the drawing of FIG. 1A). Further, the areas of the plurality of gas suction portions (openings) 30 are set so that the flow rates of the gases drawn into the plurality of gas suction portions 30 become uniform.
- the plurality of gas suction parts 30 may include one having a different opening area, or the gas drawn into the plurality of gas suction parts 30 All gas suction portions (openings) 30 may have the same area as long as the variation in flow rate is within the allowable range.
- the gas suction direction 32 in which the gas is sucked in the gas suction unit 30 is, for the same reason as the gas ejection direction 22, the vertical line of the virtual surface 23 having the same height as the surface of the powder 11 and the gas suction direction 32 It is desirable that the flow path of the atmosphere gas is set so as not to be obstructed by an obstacle such as the upper heater 24a within the range of 0 ° ⁇ ⁇ ⁇ 90 °.
- An example of the gas suction direction 32 is shown by the arrow in FIG. 1 (b).
- the gas suction direction 32 is set such that an angle ⁇ ⁇ between the vertical line of the virtual surface 23 and the gas suction direction 32 is 45 °.
- the flow path of the atmosphere gas which is jetted from the plurality of gas jetting portions 21 and sucked into the plurality of gas suction portions 30 is approximately parallel to the transport direction 15. Therefore, changes in the gas composition and flow velocity in the flow path of the atmosphere gas, which are caused by the powder in the position close to the gas ejection part sequentially coming into contact with the atmosphere gas for reaction, are in the powder transport direction. It happens along.
- each powder 11 follows the same history of atmosphere gas. Therefore, it is possible to suppress firing unevenness between the respective rows as compared with the case where there is a difference between the gas composition and the flow velocity in the lateral direction (left and right direction in FIG. 1A) orthogonal to the transport direction 15. It becomes.
- the gas may be exhausted from both ends of the exhaust pipe 29 or may be exhausted from one end.
- the gas sucked into the gas suction portion 30 from at least one side of the side wall 13c of the furnace body 13 facing in the lateral direction (left and right direction in FIG. 1A) orthogonal to the transport direction 15 is furnace By exhausting to the outside of the body 13, as described in the second embodiment described later, it is possible to stack a plurality of furnace bodies in multiple stages.
- a gas exhaust amount adjustment unit may be provided in the vicinity of each gas suction unit 30.
- a damper can be used for the gas exhaust amount adjustment unit.
- a plurality of gas suction portions 30 and exhaust pipes 29 respectively connected to the gas suction portions 30 are provided, and the flow rates of the gases drawn into the gas suction portions 30 are individually
- the gas exhaust amount adjustment unit 31 may be provided for each of the exhaust pipes 29 to be controlled.
- the structure which provided two gas suction parts 30 was shown in FIG. 7, of course, three or more gas suction parts can also be provided.
- an exhaust fan can be used for the gas exhaust amount adjustment unit.
- a gas exhaust amount adjustment unit may be provided in the vicinity of each gas suction unit 30.
- a damper can be used for the gas exhaust amount adjustment unit.
- the furnace body 13 of the firing apparatus is divided along the transport direction 15 into a plurality of zones (processing spaces) corresponding to the firing process.
- FIG. 1 (b) shows the cross section of one of them.
- Each zone is partitioned by a zone partition 33, and the zone partition 33 is provided with a passage hole 34 through which the loading member 12 can pass.
- the gas introduction mechanism, the gas exhaust mechanism, and the heating unit (upper heater 24a and lower heater 24b) described above are provided in part or all of the plurality of zones according to the firing process.
- the gas exhaust mechanism may not be provided in the above-mentioned zone where the unnecessary gas is not generated.
- the condition is that the type of the atmosphere gas is the same as the zone adjacent to the zone, and that the zone is not the beginning or end zone. It is necessary to provide a gas exhaust mechanism in the start and end zones in order to prevent hot air leakage to the outside of the furnace body 13.
- the upper heater 24a and the lower heater 24b may not be provided in the zone where the powder 11 is rapidly cooled. Further, only the gas exhaust mechanism may be provided in the end zone without providing the gas introduction mechanism.
- the heating unit the upper heater 24a and the lower heater 24b
- the output of the heating unit can be optimized.
- the atmosphere gas is adjusted according to the heat treatment to be performed in each zone such as synthesis accompanied by a chemical reaction, removal of impurities, improvement of crystal structure, and growth of particles.
- the control of the flow rate and the control of the component mixture ratio of the atmosphere gas can be performed optimally.
- the baking apparatus includes a conveyance detection unit 35.
- the conveyance detection unit 35 detects whether or not the powder 11 is being conveyed. Further, the conveyance detection unit 35 transmits a detection signal indicating whether or not the powder 11 is being conveyed to the control device 17.
- the control device 17 as a control unit sends signals for reducing the output of the upper heater 24a and the lower heater 24b to the temperature controller 25a for the upper heater and for the lower heater.
- a signal for reducing the supply flow rate of the atmosphere gas supplied to the air supply pipe 18 while transmitting to the temperature controller 25 b is sent to the atmosphere gas supply source 19 and / or the gas flow rate adjustment unit 20. In this way, it is possible to reduce the energy consumption of the firing apparatus when production is not performed and to reduce the running cost of the firing apparatus.
- the firing is performed such that any one of the above conditions is satisfied in all gas jet parts in all zones. It is desirable to configure the device.
- the baking apparatus is configured to satisfy the following relationship.
- Ho is the reference distance [mm] between the reference virtual surface having the same height as the surface layer surface before firing of the powder 11 and the gas ejection part 21, and H ′ is the surface surface during firing of the powder 11 and
- the variation distance [mm] between the variation virtual surface of the same height and the gas ejection part 21, ⁇ H is the variation range [mm] of the variation distance H 'due to the volume change during firing of the powder 11, and Uc' It is a critical friction velocity [mm / s] at which scattering of powder 11 occurs during firing.
- the critical friction velocity Uc 'at which scattering of the powder 11 in the middle of firing occurs is the physical property value of the powder 11 in the middle of firing (the particle diameter and density of the powder 11 in the middle of firing) And proportional constants are substituted.
- the proportional constant of the powder 11 in the middle of firing can be separately obtained by experiments.
- the furnace body 13 is divided into a plurality of zones along the transport direction 15, and a plurality of rows of the loading members 12 along the transport direction 15 are arranged in the lateral direction orthogonal to the transport direction 15 to form multiple rows thereof.
- the powder 11 is uniformly contacted with a sufficient atmosphere gas with a small amount of gas supply while suppressing the scattering of the powder 11 in all zones. It is possible to
- FIGS. 8 (a) and 8 (b) are cross-sectional views showing an example of the configuration of a baking apparatus according to Embodiment 2 of the present invention.
- FIG. 8 (a) is a cross section of the multi-stage furnace body cut along a plane perpendicular to the conveyance direction of the loading member on which powder is loaded
- FIG. 8 (b) is delivery of the loading member on which powder is loaded.
- disconnected the multistage furnace body in the perpendicular surface which followed the direction is shown, respectively.
- 8 (a) and 8 (b) the same reference numerals are used for the same elements as the elements shown in FIGS. 1 (a) and 1 (b), and the description will be omitted.
- This baking apparatus has a structure in which the furnace bodies 13 described in the first embodiment described above are stacked in multiple stages in the height direction (vertical direction).
- FIGS. 8A and 8B show a multistage furnace body 36 in which three furnace bodies 13 are stacked.
- the number of stages to be laminated is not limited to three, and any number of stages may be used as long as the installation height of the baking apparatus and the load resistance of the floor allow.
- Productivity increases as the number of stages increases, but the degree of difficulty of transportation and the degree of difficulty of uniformly supplying gas and supplying heat to each stage also increase.
- the air supply pipe 18 provided in the furnace body 13 of each stage is connected to the combined air supply pipe 37 which is a part of the gas introduction mechanism at the outside of the furnace body 13, and the merged air supply pipe 37 is the same as that of the first embodiment described above. Similarly, it is connected to the atmosphere gas supply source outside the furnace body 13. Further, the exhaust pipe 29 provided in the furnace body 13 of each stage is connected to the combined exhaust pipe 38 which is a part of the gas exhaust mechanism outside the furnace body 13, and the combined exhaust pipe 38 is the embodiment described above. Similar to 1, it is connected to the gas discharge amount adjustment unit outside the furnace body 13.
- the furnace body 13 is divided into a plurality of zones along the transport direction 15, as in the first embodiment described above, and two zones among them are shown in FIG. 8 (b).
- the gas introduction mechanism including the combined air supply pipe 37 and the gas exhaust mechanism including the combined exhaust pipe 38 are respectively provided in units of zones.
- the supply of the atmosphere gas to the inside of the furnace 13 and the exhaust of the gas to the outside of the furnace 13 are performed from at least one side of the side wall 13 c of the furnace 13 Since it has become, it is not necessary to provide a gas introduction mechanism and a gas exhaust mechanism on the upper and lower surfaces of the furnace body 13. Therefore, the height of the furnace body 13 can be suppressed, and multi-stage stacking in the height direction of the furnace body 13 becomes possible while saving space.
- the outputs of the upper heater 24a and the lower heater 24b can be optimally controlled, respectively, to avoid the effects of heat radiation from the upper and lower surfaces of the multistage furnace body 36 to the outside. Therefore, it becomes possible to suppress temperature unevenness of the loading member 12 and the powder 11 in each stage.
- the loading members are stacked in multiple stages in the height direction inside one furnace body, temperature unevenness and gas supply unevenness of the loading member and the powder are caused between each step. Therefore, the scattering of the powder 11 can be suppressed. Therefore, it is possible to significantly improve the productivity.
- the baking apparatus according to the present invention can realize improvement in productivity while suppressing baking unevenness, and is useful in various fields having a step of continuously heat-treating an object loaded on a loading member.
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Abstract
Description
図1(a)および図1(b)は本発明の実施の形態1における焼成装置の一構成例を示す断面図である。詳しくは、図1(a)は粉体が積載された積載部材の搬送方向に垂直な面で炉体を切断した断面を、図1(b)は粉体が積載された積載部材の搬送方向に沿った鉛直な面で炉体を切断した断面をそれぞれ示している。また、図2は本発明の実施の形態1における焼成装置の制御ブロックの一構成例を示す図である。
(条件1)
U=0.0315×S-0.5×Q
H/cosθ≦80
U<Uc
(条件2)
U=(1.694+0.0105×H/cosθ)×S-0.5×Q×cosθ/H
80<H/cosθ≦150
U<Uc
(条件3)
U=(5.476-0.0142×H/cosθ)×S-0.5×Q×cosθ/H
150<H/cosθ≦300
U<Uc
(条件4)
U=S-0.5×Q×cosθ/H
H/cosθ>300
U<Uc
ここで、Sはガス噴出部(開口)21の面積[mm2]、Qはガス噴出部21から噴出する雰囲気ガスの流量[mm3/s]、Hは仮想面23とガス噴出部21との間の距離[mm]、θは仮想面23の垂線とガス噴出方向22との成す角度[°]、Uはガス噴出方向22の延長線上の仮想面23における雰囲気ガスの流速[mm/s]、Ucは粉体11の飛散が起こる臨界摩擦速度[mm/s]である。
ここで、Dpは粉体の粒子径[m]、gは重力加速度[m/s2]、ρpは粉体の密度[kg/m3]、ρaは雰囲気ガスの密度[kg/m3]である。粒子径の測定には、レーザ回折式の粒度分布測定を用いることができる。また、粒径評価にはメディアン径を用いることができる。Aは比例定数で、粉体の種類や、隣接する粒子間の結合の状態によって値が異なり、別途実験によって求めることができる。
H=H’=Ho+ΔH
U<Uc’
の関係を満たすように当該焼成装置を構成する。
以下、本発明の実施の形態2について、図面を参照しながら説明する。図8(a)および図8(b)は本発明の実施の形態2における焼成装置の一構成例を示す断面図である。詳しくは、図8(a)は粉体が積載された積載部材の搬送方向に垂直な面で多段炉体を切断した断面を、図8(b)は粉体が積載された積載部材の搬送方向に沿った鉛直な面で多段炉体を切断した断面をそれぞれ示している。なお、図8(a)および図8(b)において、図1(a)および図1(b)に示す要素と同じ要素については同じ符号を用い、説明を省略する。
Claims (20)
- 内部空間を有しその内部空間において粉体状あるいは粒体状の被処理物が焼成される炉体と、
前記炉体の内部空間を搬送される前記被処理物の上方から雰囲気ガスを噴出する開口を有するガス噴出部と、
前記炉体の側壁から前記ガス噴出部へ前記雰囲気ガスを供給するガス供給部と、
前記炉体の内部空間の温度分布を制御する加熱部と、
を備えることを特徴とする
焼成装置。 - 前記炉体の内部空間を搬送される粉体状あるいは粒体状の被処理物の表層面と同じ高さの仮想面と前記ガス噴出部との間の距離が300[mm]以下であることを特徴とする
請求項1記載の焼成装置。 - 前記ガス噴出部の面積をS[mm2]、前記ガス噴出部から噴出する前記雰囲気ガスの流量をQ[mm3/s]、前記炉体の内部空間を搬送される粉体状あるいは粒体状の被処理物の表層面と同じ高さの仮想面と前記ガス噴出部との間の距離をH[mm]、前記仮想面の垂線と前記雰囲気ガスの噴出方向とがなす角度をθ[°]、前記雰囲気ガスの噴出方向の延長線上の前記仮想面における前記雰囲気ガスの流速をU[mm/s]、前記被処理物の飛散が起こる臨界摩擦速度をUc[mm/s]としたとき、以下の条件1~条件4のいずれかを満たす構成であることを特徴とする
請求項1もしくは2のいずれかに記載の焼成装置。
(条件1)
U=0.0315×S-0.5×Q
H/cosθ≦80
U<Uc
(条件2)
U=(1.694+0.0105×H/cosθ)×S-0.5×Q×cosθ/H
80<H/cosθ≦150
U<Uc
(条件3)
U=(5.476-0.0142×H/cosθ)×S-0.5×Q×cosθ/H
150<H/cosθ≦300
U<Uc
(条件4)
U=S-0.5×Q×cosθ/H
H/cosθ>300
U<Uc - 前記炉体の内部空間を搬送される粉体状あるいは粒体状の被処理物の焼成前の表層面と同じ高さの基準仮想面と前記ガス噴出部との間の基準距離をHo[mm]とし、前記被処理物の焼成途中の表層面と同じ高さの変動仮想面と前記ガス噴出部との間の変動距離をH’[mm]とし、前記被処理物の焼成途中の体積変化に起因する前記変動距離の変動幅をΔH[mm]とし、焼成途中の前記被処理物の飛散が起こる臨界摩擦速度をUc’[mm/s]としたとき、前記条件1~条件4のいずれかの条件において、前記被処理物の表層面と同じ高さの前記仮想面と前記ガス噴出部との間の距離H[mm]、および前記ガス噴出部から噴出する前記雰囲気ガスの噴出方向の延長線上の前記仮想面における前記雰囲気ガスの流速U[mm/s]が
H=H’=Ho+ΔH
U<Uc’
の関係を満たすことを特徴とする
請求項3記載の焼成装置。 - 被処理物の搬送方向に直交する方向に、前記雰囲気ガスを噴出する前記開口を有する前記ガス噴出部が複数個設けられていることを特徴とする
請求項1ないし4のいずれかに記載の焼成装置。 - 複数個の前記ガス噴出部は、前記雰囲気ガスを噴出する前記開口の面積が異なるものを含むことを特徴とする
請求項5記載の焼成装置。 - 複数個の前記ガス噴出部から噴出する前記雰囲気ガスの流量を前記ガス噴出部ごとに制御するガス流量調整部を備えることを特徴とする
請求項5記載の焼成装置。 - 複数個の前記ガス噴出部から噴出する前記雰囲気ガスの成分混合比を前記ガス噴出部ごとに制御するガス成分調整部を備えることを特徴とする
請求項5記載の焼成装置。 - 前記炉体の内部空間を被処理物の搬送方向に沿って焼成プロセスに応じた複数の処理空間に分割する隔壁を備え、前記ガス供給部と前記ガス噴出部と前記加熱部が、焼成プロセスに応じて前記複数の処理空間の全部または一部に設けられていることを特徴とする
請求項1ないし4のいずれかに記載の焼成装置。
- 前記ガス噴出部から噴出する前記雰囲気ガスの流量を前記処理空間単位で制御するガス流量調整部を備えることを特徴とする
請求項9に記載の記載の焼成装置。 - 前記ガス噴出部から噴出する前記雰囲気ガスの成分混合比を前記処理空間単位で制御するガス成分調整部を備えることを特徴とする
請求項9に記載の記載の焼成装置。 - 前記炉体の内部空間のガスを、前記炉体の内部空間を搬送される粉体状あるいは粒体状の被処理物の上方から吸込む開口を有するガス吸込部と、
前記ガス吸込部へ吸込まれたガスを、前記炉体の側壁から前記炉体の外部へ排出するガス排出部と、
を備え、前記ガス噴出部から噴出される前記雰囲気ガスの流路が前記被処理物の搬送方向と平行になるように、前記ガス噴出部と前記ガス吸込部とが配置されていることを特徴とする
請求項1ないし8のいずれかに記載の焼成装置。 - 被処理物の搬送方向に直交する方向に、前記炉体の内部空間のガスが吸込まれる前記開口を有する前記ガス吸込部が複数個設けられていることを特徴とする
請求項12記載の焼成装置。
- 前記炉体の内部空間のガスを、前記炉体の内部空間を搬送される粉体状あるいは粒体状の被処理物の上方から吸込むガス吸込部と、
前記ガス吸込部へ吸込まれたガスを、前記炉体の側壁から前記炉体の外部へ排出するガス排出部と、
を備え、前記ガス吸込部と前記ガス排出部は、焼成プロセスに応じて前記複数の処理空間の全部または一部に設けられており、前記ガス噴出部から噴出される前記雰囲気ガスの流路が前記被処理物の搬送方向と平行になるように、前記ガス噴出部と前記ガス吸込部とが配置されていることを特徴とする
請求項9ないし11のいずれかに記載の焼成装置。
- 複数個の前記炉体が多段に積層されていることを特徴とする
請求項1ないし14のいずれかに記載の焼成装置。 - 前記加熱部は、被処理物の搬送方向に直交する方向に沿った温度分布を均一にするよう構成されていることを特徴とする
請求項1ないし15のいずれかに記載の焼成装置。 - 前記加熱部として、被処理物の搬送路を挟んで配置される第1加熱器および第2加熱器を備えることを特徴とする
請求項1ないし16のいずれかに記載の焼成装置。 - 前記第1加熱器および前記第2加熱器はそれぞれ被処理物の搬送方向に沿って複数個配置されていることを特徴とする
請求項17記載の焼成装置。 - 前記第1加熱器および前記第2加熱器の出力をそれぞれ個別に制御する出力調整部を備えることを特徴とする
請求項17もしくは18のいずれかに記載の焼成装置。 - 被処理物の搬送が行われているか否かを検知する検知部と、前記被処理物の搬送が行われていないことが前記検知部により検知されたときに、前記加熱部の出力を低減させ、前記雰囲気ガスの供給流量を低減させる制御部と、を備えることを特徴とする
請求項1ないし19のいずれかに記載の焼成装置。
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CN102748941A (zh) * | 2011-04-22 | 2012-10-24 | 松下电器产业株式会社 | 热处理装置 |
JP2016153704A (ja) * | 2015-02-20 | 2016-08-25 | 日本碍子株式会社 | 連続式焼成炉 |
KR102686945B1 (ko) * | 2021-12-08 | 2024-07-22 | 한화모멘텀 주식회사 | 복층식 열처리로 |
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DE102011056823A1 (de) * | 2011-12-21 | 2013-06-27 | Thyssen Krupp Steel Europe AG | Düseneinrichtung für einen Ofen zum Wärmebehandeln eines Stahlflachprodukts und mit einer solchen Düseneinrichtung ausgestatteter Ofen |
DE102018108291A1 (de) * | 2018-04-09 | 2019-10-10 | Eisenmann Se | Ofen |
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JPH09287880A (ja) * | 1996-04-22 | 1997-11-04 | Tokai Konetsu Kogyo Co Ltd | ガス雰囲気炉 |
JP2009068739A (ja) * | 2007-09-12 | 2009-04-02 | Sumitomo Metal Mining Co Ltd | 連続焼成炉 |
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JPS5950604B2 (ja) * | 1981-11-27 | 1984-12-10 | 三菱マテリアル株式会社 | 酸化チタン粉末の製造法 |
US6080446A (en) * | 1997-08-21 | 2000-06-27 | Anelva Corporation | Method of depositing titanium nitride thin film and CVD deposition apparatus |
EP0922786B1 (en) * | 1997-11-25 | 2012-10-24 | Fuji Kihan Co., Ltd. | Method for forming ceramic coated products |
US7208193B2 (en) * | 2002-12-17 | 2007-04-24 | Research Foundation Of The State University Of New York | Direct writing of metallic conductor patterns on insulating surfaces |
JP5401015B2 (ja) * | 2007-03-15 | 2014-01-29 | 光洋サーモシステム株式会社 | 連続式焼成炉 |
JP5216246B2 (ja) * | 2007-06-04 | 2013-06-19 | 光洋サーモシステム株式会社 | 連続焼成炉 |
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2010
- 2010-05-25 JP JP2010550760A patent/JPWO2010137286A1/ja active Pending
- 2010-05-25 US US13/056,888 patent/US20110136069A1/en not_active Abandoned
- 2010-05-25 CN CN201080001914.XA patent/CN102066862B/zh not_active Expired - Fee Related
- 2010-05-25 WO PCT/JP2010/003474 patent/WO2010137286A1/ja active Application Filing
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JPH063070A (ja) * | 1992-06-18 | 1994-01-11 | Murata Mfg Co Ltd | 焼成炉 |
JPH09287880A (ja) * | 1996-04-22 | 1997-11-04 | Tokai Konetsu Kogyo Co Ltd | ガス雰囲気炉 |
JP2009068739A (ja) * | 2007-09-12 | 2009-04-02 | Sumitomo Metal Mining Co Ltd | 連続焼成炉 |
Cited By (4)
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CN102748941A (zh) * | 2011-04-22 | 2012-10-24 | 松下电器产业株式会社 | 热处理装置 |
JP2012225620A (ja) * | 2011-04-22 | 2012-11-15 | Panasonic Corp | 熱処理装置 |
JP2016153704A (ja) * | 2015-02-20 | 2016-08-25 | 日本碍子株式会社 | 連続式焼成炉 |
KR102686945B1 (ko) * | 2021-12-08 | 2024-07-22 | 한화모멘텀 주식회사 | 복층식 열처리로 |
Also Published As
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US20110136069A1 (en) | 2011-06-09 |
CN102066862A (zh) | 2011-05-18 |
CN102066862B (zh) | 2013-02-27 |
JPWO2010137286A1 (ja) | 2012-11-12 |
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