JP2010094606A - Manufacturing apparatus of heat-resistant composition by calcining treatment of waste containing inorganic compound, and the heat-resistant composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture useful heat-resistant composition by processing hazardous wastes such as asbestos. <P>SOLUTION: The manufacturing apparatus of heat-resistant composition by a calcining treatment of inorganic compound is characterized in that a hearth for calcining wastes is installed on a movable rack, wherein the wastes includes needle-like inorganic compound which is impregnated with an aqueous solution containing polyaluminum chloride and organic matter, or boron compound, phosphate hydrogen ammonium, sodium compound and organic matter, that a calcination furnace is constituted by oppositely installing calcining devices each equipped with a burner in the upper part of the hearth so as to be elevated and lowered, and that an exhausting device having an exhausting function is attached to the calcination furnace, and the feeding device of the wastes is attached to the calcination furnace. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a manufacturing apparatus and a heat-resistant composition for producing a useful heat-resistant composition by firing a waste material containing needle-shaped inorganic compounds such as synthetic zonolite and glass fiber.

  Emphasis has been placed on the detoxification treatment of recent acicular inorganic compounds, and various methods have been proposed and implemented in part. In particular, asbestos waste is said to leave a root in future generations if it is not dealt with promptly, and in Japan, 1 million tons of waste disposal is predicted annually.

  Currently known processing technologies include plasma melting slag technology at a high temperature of 1500 ° C. or higher, detoxification technology at 700 ° C. using a halogen compound, etc., which requires enormous energy, The conventional harmful substance reaction was merely diverted, and none of the useful substances were regenerated by treatment. Asbestos waste that is not subjected to the above treatments has been known to be effective only by being sealed and buried.

The inventor of the present invention has previously developed an aqueous solution for solving various problems (for example, high scattering properties) during the treatment of asbestos waste (Patent Document 1). The asbestos waste is impregnated in the aqueous solution to prevent scattering, and the asbestos waste impregnated with the aqueous solution is heated at 400 ° C. to 1000 ° C., thereby being excellent in heat resistance, flame retardancy, conductivity, etc. Succeeded in producing a useful composition.
JP2007-160235 Japanese Patent No. 4081775 Japanese Patent No. 4081776

  Conventionally, asbestos waste is melted in a high-temperature furnace at 1500 ° C. or more (Patent Documents 2 and 3), but not only enormous energy is required to heat and melt in such a high-temperature furnace, There was no special use for the molten slag produced thereby. Therefore, there is a problem that not only the energy becomes enormous, but also the value of the product is extremely low.

  Asbestos waste also has a problem that requires special consideration in the work because fine particles are scattered and may cause harm.

  Furthermore, not only frequent maintenance is required for the high temperature furnace, but also the high temperature furnace itself has a number of problems, such as the lifetime of the melting furnace being short.

  In the present invention, a carbon aluminum composite compound is impregnated with a waste containing an inorganic compound (hereinafter referred to as “asbestos waste”), or a carbon aluminum composite compound is coated on an asbestos waste, and this is heated in a heating furnace at 400 ° C. to Since it was made into a heat resistant composition by heating to 1000 ° C., it improved the point that it could be regenerated into a useful product among the conventional problems.

  In a conventional melting furnace, it becomes a molten liquid, and if cooled, the whole becomes only a large lump of glass. However, the present invention opens the hearth to the outside air, and the heating temperature is 400 ° C. to 1000 ° C. Since it is at 0 ° C., the heat-treated product can be cooled to be easily handled. In addition, handling of asbestos waste that has been difficult to handle due to the high-temperature melting furnace has become extremely easy, and a useful heat-resistant composition can be produced smoothly and easily by treating asbestos waste. Thus, the above conventional problems were greatly improved.

  In addition, by making the platform on which the hearth is installed movable, a reasonable heat-resistant composition manufacturing apparatus that can be heated at an appropriate temperature by a heating device was obtained.

  That is, according to the present invention, a hearth for firing waste containing an inorganic compound containing a treatment aqueous solution is installed on a movable frame, and a firing device provided with a burner above the hearth is installed facing a predetermined interval. A firing furnace is configured, and the firing apparatus is provided with a fuel supply device and an exhaust device having an exhaust treatment function, and a waste supply device is provided on the outer upper portion of the combustion furnace. A device for producing a heat-resistant composition by calcining an inorganic compound to be impregnated with an aqueous solution containing polyaluminum chloride and an organic substance, or a boron compound, ammonium hydrogen phosphate, a sodium compound and an organic substance. The furnace floor for firing the waste containing the waste is placed on a movable frame, and a firing apparatus provided with a burner is installed above the furnace floor so as to be movable up and down to constitute a firing furnace. While attached an exhaust system having an exhaust processing function, an apparatus for manufacturing a heat-resistant composition according to the firing process of an inorganic compound, characterized in that additionally provided a supply device of the waste.

  In another invention, a plurality of firing furnaces are installed in parallel, and an exhaust device is attached to each firing furnace. The firing furnace has a rectangular shape in plan view, and the base of the hearth is It can be reciprocated in the longitudinal direction.

  Next, another invention is provided such that a hearth for firing waste containing inorganic compounds is installed in an annular conveyor shape that moves in a horizontal direction, and a firing device is installed above the hearth so that it can be moved up and down. An apparatus for producing a heat-resistant composition by firing an inorganic compound, characterized in that a firing furnace is configured with an exhaust device attached thereto.

  According to another aspect of the present invention, there is provided a calcining apparatus in which the hearth according to claim 1 is installed at equal intervals on the upper periphery of the turntable, and the waste of at least one hearth can be heated above the trajectory of the hearth. An apparatus for producing a heat-resistant composition by a firing treatment of an inorganic compound, wherein the firing device is configured so as to be movable up and down, and a firing furnace is configured by connecting a treatment device for exhaust generated during heating to the firing device. .

  In yet another invention, the hearth for firing the waste containing the inorganic compound containing the treatment aqueous solution is installed in the shape of an annular conveyor that moves in the horizontal direction, and the firing device can be moved up and down above the hearth. In addition, an exhaust device is attached to the firing device, the conveyor is configured to be capable of moving forward and backward, and a waste supply device containing the inorganic compound is installed on one side upper portion of the firing device. The heat-resistant composition is produced by firing an inorganic compound, and the exhaust device is a suction duct, a cooling tower, a greenhouse, a dust collector, and a dust collecting fan.

  Next, the invention of the composition is a heat-resistant composition manufactured using the apparatus according to claim 1, 2, 5, 6 or 7.

  The aqueous solution containing polyaluminum chloride and organic matter used in the present invention will be described as follows.

The polyaluminum chloride is a substance represented by [AI ₂ (OH) _n Cl _6-n ] _m (1 <n <5), and is an aqueous solution containing a polynuclear complex of aluminum cross-linked with OH as a water component. Say. The production method is not limited. For example, it is preferable to dissolve aluminum hydroxide in hydrochloric acid, add a dissolution aid under pressure or if necessary, and add a sulfate group as a polymerization accelerator to react. The dissolution aid and the polymerization accelerator are not particularly limited as long as the effect of the aqueous solution is not impaired. In the above formula, m is preferably 10 or less.

  As the organic substance, there is no particular limitation on the “organic substance” essential as a carbon source of the carbon-aluminum composite compound. However, an organic substance that is liquid at room temperature or a water-soluble organic substance is dispersed or dissolved in an aqueous dispersion containing polyaluminum chloride. An easy point is preferable. Examples of the organic substance include resins, and examples thereof include acrylic resins, polyester resins, epoxy resins, and vinyl ester resins.

  Also, it dissolves or disperses in an aqueous solution in the presence of one or more kinds of particles selected from the group consisting of carbon particles, clay mineral particles, borax and wood particles, or inorganic compound particles such as asbestos, which are not water-soluble organic substances. .

  Next, examples of the carbon particles include charcoal, bamboo charcoal, etc., wood particles such as wood waste and canna waste, paper such as waste paper, cardboard and shredder paper, residue of okara, corn, wheat, rice, etc., rice husk And cereal husks such as buckwheat husks. The clay mineral particles are preferably diatomaceous earth, zircon flower, bentonite, porcelain clay, and the like.

  The hearth used in the present invention is made of refractory bricks or other refractories that can withstand 400 ° C. to 1000 ° C. Although there is no special limitation about the material of the hearth, since the operation which heats to 400 degreeC-1000 degreeC and then cools is repeated, what can endure the said heating cooling in a conventionally well-known hearth material is preferable. In particular, the upper limit is 1000 ° C., but a material that can withstand 1500 ° C. is preferable.

  The heating in this invention is mainly a gas burner (using various gaseous fuels including city gas), but an oil burner can be used. Moreover, since the organic substance contained in the aqueous solution combines only the decomposition gas generated by heating with oxygen and burns completely, it is preferable that the temperature by the combustion be 400 ° C. to 1000 ° C. For example, the temperature is controlled by adjusting the heating device up and down or by controlling the fuel supply amount such as a gas burner. Since the heating time for producing the heat-resistant composition varies depending on the temperature control, it is necessary to correctly grasp the temperature. For example, in the case of heating at 400 ° C., the heat treatment is performed for 60 minutes, and in the case of 1000 ° C., the heat treatment is performed for 10 minutes, thereby achieving the object.

  Since the hearth frame of the present invention can be moved, when the product temperature directly below the gas burner rises from the other part, the frame can be moved slightly to perform the uniform heating treatment.

  Although the heat processing temperature in this invention is 400 to 1000 degreeC, 600 to 1000 degreeC is preferable and 800 to 1000 degreeC is the most preferable. However, the heatable range is 400 ° C. to 2000 ° C. However, if it is 1000 ° C. to 2000 ° C., the material of the hearth must be limited, and damage to the hearth due to repeated use is severe. Since repair and replacement are also necessary, the heating temperature was set to 400 ° C. to 1000 ° C. as a durable hearth for one year or more of continuous use. However, 800 ° C. to 1000 ° C. is used as the implementation temperature in terms of efficiency.

  In the gantry of the present invention, wheels are attached to the lower portions of the left and right (FIG. 1) ends of the frame having a strength that can withstand the weight of the hearth (at least four wheels in total, respectively), and the wheels are laid on the floor. It is installed on the rail. Therefore, the hearth and the frame are preferably rectangular in plan view. Of course, when the hearth is installed like a conveyor or on a turntable, the above strength is required.

  The heating device has two devices arranged in parallel at the front and rear with a predetermined interval, and an exhaust device and a cooling device for the exhaust device are provided between the devices.

  Of course, one manufacturing apparatus may be used according to the present invention, but two can be used more efficiently. Although the above-mentioned frame type hearth has been described, even when an annular conveyor-like hearth is installed, it is not hindered that two units are in parallel. In such a case, the conveyor allows continuity with firing and increases its length. Further, the forward and backward movement of the hearth can be easily realized by reversing the traveling direction of the conveyor.

  In addition, if the hearth is arranged on the periphery of the turntable at equal intervals and a firing device for heating the hearth is installed above the passing position of the hearth, the continuous firing can be practically performed. That is, the waste on the hearth under the firing device is always fired, and waste is loaded into the hearth located outside the firing device, or the fired product is taken out.

  In the above invention, when the hearth is provided in the form of a conveyor, the waste on the hearth moves if the speed of the conveyor is adjusted so that the time passing under the baking apparatus can match the baking time. Since it is fired, continuous processing can be performed.

  In the present invention, since there is a space between the hearth and the calciner, the combustible in the waste automatically takes in the air and burns, and there is no risk of oxygen shortage.

  In the present invention, the inorganic material to be processed is preferably supplied automatically and quantitatively from the material tank.

  According to this invention, since the firing device is installed on the upper part of the hearth so that it can be raised and lowered, there is an effect that the temperature can be adjusted by raising and lowering and firing can be performed at an appropriate temperature for an appropriate time. Further, since the hearth can be moved, there is an effect that firing and taking out can be performed in different places.

  In the present invention, when the hearth is installed in the form of a conveyor, unlike the operation of the gantry, there is an effect that the hearth can be moved, stopped, and reversely automatically and accurately by moving the conveyor. Further, since a space is interposed between the hearth and the baking apparatus, there is an effect that oxygen necessary for the combustion of organic substances can be self-supplied.

  Further, if the hearth is installed on the turntable, there is an effect that the waste treatment and extraction can be concentrated on the center of the turntable and the rationalization treatment can be performed.

  This invention is provided with a hearth for firing waste containing a needle-like inorganic compound impregnated with an aqueous solution containing polyaluminum chloride and an organic substance on a gantry, the gantry is erected on a rail and movable. A firing device provided with a burner is installed above the hearth so as to be movable up and down to constitute a firing furnace, and an exhaust device having an exhaust treatment function is attached to the firing furnace, and the inorganic compound supply device is provided. Attached.

  In the above, two baking apparatuses are installed in parallel at a predetermined interval, and a space is provided by taking out on an extension line of each baking apparatus. In addition, a waste supply device is provided between the take-out space and the firing device, and the waste is supplied in accordance with the movement of the hearth so that an equal amount of waste is placed on the entire hearth. .

  A hydraulic cylinder is provided vertically on the machine frame of the baking apparatus, and the rod of the hydraulic cylinder is fixed to the machine frame, and the baking apparatus is moved up and down by raising and lowering the rod. The raising and lowering of the baking apparatus is not limited to the hydraulic cylinder and the rod, and can be moved up and down using a known apparatus without restriction on the structure.

  An embodiment of the present invention will be described with reference to Figs. Are attached (two pairs are provided), and the wheels 3 and 3 are installed on the rail 4. Above the hearth 1, a firing device 5 in which burner devices 6, 6 are installed at predetermined intervals is suspended by wires 7, 7 which are connected to the hydraulic cylinder 9 via guides 8, 8. It was connected to the rod 11 so that it could be moved up and down as indicated by an arrow 71 to constitute the manufacturing apparatus 10 of the present invention. The gantry 2 can move on the rail 4 as indicated by arrows 36 and 37.

  Two manufacturing apparatuses 10 are installed in parallel at a predetermined interval L (FIG. 2), and an exhaust pipe 12, a cooling tower 13, and a temperature reducing tower 14 are installed between the manufacturing apparatus 10 and its cooling space 18, respectively. The cooling tower 13 is connected to a temperature reducing tower 14 through an exhaust pipe 15a, the temperature reducing tower 14 is connected to a dust collector 16 through an exhaust pipe 15, and the dust collector 16 is used for collecting dust through an exhaust pipe 15b. A fan 17 is connected. In addition, a waste supply tower 19 is provided between the firing device 5 and the cooling positions 18, 18, and the waste is supplied onto the hearth 1 through a meter 20. The dust collector 16 is connected to the chimney 21 through a multi-layer filtration layer and a dust collecting fan 17. The dust separated by the filtration layer is incinerated by the heater 22, and the incineration ash is discharged to the outside through the discharge port 23. A product outlet 24 is provided on one side of the hearth, and the outlet 24 is connected to a product tank 26 via a transfer pipe 25 (FIG. 7). The exhaust gas enters the cooling tower 13 as indicated by an arrow 76, and is discharged from the chimney 21 through the temperature reducing tower 14, the dust collector 16, and the dust collecting fan 17 as indicated by arrows 77, 78, 79, 80, and 81. Is done. Further, the product passes through the transfer pipe 25 and remains in the product tank as indicated by an arrow 82.

  About the said Example, the use condition is demonstrated. In FIG. 6, waste asbestos is introduced from the screw conveyor 41 into the processing tank 27 as indicated by an arrow 83. Therefore, oil is fed from the hydraulic pump 84 through the oil feeding pipe as indicated by arrows 85 and 86, and the pusher 28 is advanced and retracted. Next, it is pushed into the pulverizer 29 by the pusher 28, pulverized and dropped into the storage tank 30. In this case, since asbestos is pulverized to 1 cm or less, it is in a floating state with respect to the aqueous solution. Then, it stirred with the stirrer 31, and the said asbestos strip and the aqueous solution were mixed uniformly. In the above, since the aqueous solution is fed into the storage tank 30 through the pipe 42 as indicated by an arrow 34, this aqueous solution and asbestos are mixed.

  Next, the mixed aqueous solution is sent to the supply tower 19 as indicated by an arrow 73 through the pipe 33 by the crushing pump 32, and supplied to the appropriate amount on the hearth 1 through the measuring device 20 (FIG. 5). When the supply amount is large, the supply tower returns from the pipe 75 as indicated by an arrow 74. The combustion carts 2, 2 including the hearth 1 and the gantry 2 a are returned from the standby position to the combustion position, and the burner of the firing device 5 is ignited to burn asbestos close to the hearth 1. For example, when burning at 800 ° C., organic substances in the aqueous solution also burn. In this case, since the hearth 1 and the baking apparatus 5 are spaced apart, air (oxygen) necessary for the combustion of the combustible gas generated from the organic substance is automatically supplied in an appropriate amount. Therefore, there is no risk of incomplete combustion due to lack of oxygen. The combustion temperature in the above can be adjusted by the fuel supply amount of the burner and the distance between the calcining device 5 and the hearth 1.

  If the combustion is continued for 20 minutes, the combustion carriage 2 is moved to the standby position to cool the fired product on the hearth. On the other hand, the exhaust gas generated by the combustion is collected by the exhaust pipe 12 and discharged from the chimney to the outside through the cooling tower 13, the temperature reducing tower 14, the exhaust duct 15 and the dust collector 16.

  In FIG. 5 of the first embodiment, the operation at the standby position (cooling position) will be described. At the standby position, the exhaust air is sucked from the suction heads 56 and 56 through the pipe 57, transferred as indicated by arrows 58 and 58, connected to the pipe 15 and reaches the cooling tower 13, and is processed by FIG. . Further, the heat-resistant composition obtained by the baking treatment is accommodated in the product tank 26 from the outlet 24 in FIG.

  The waste is supplied from the supply tower 19 through the branch pipes 59 and 59a and the pipe 60 onto the two hearths 1 and 1a arranged in parallel as indicated by arrows 61 and 62. In the figure, 63 and 63 are open / close lids for waste input ports, and 64 is an open / close lid for exhaust suction ports.

  Next, in FIG. 7, the cooling water is sprinkled from the cooling water pump 65 through the water supply pipe 66 to the temperature reducing tower 14 as indicated by an arrow 67 to reduce the temperature. In the figure, 68 is a compressor, 69 is an activated carbon hopper, 70 is a slaked lime hopper, and 71 is a dust collecting fan.

  Another embodiment of the present invention will be described with reference to FIG. In the first embodiment, asbestos waste is intermittently heated and cooled, and is fired at regular intervals (for example, 20 to 60 minutes). Example 2 is a continuous firing method in which firing is performed continuously and cooling is performed.

  That is, the manufacturing apparatus of the second embodiment will be described with reference to FIG. 8. A conveyor 38 for moving the hearth 1 to the cooling position 36 is laid in an annular shape below the baking apparatus 35. The hearth pieces 39 and 39 are densely mounted on the conveyor 38. In this case, when the conveyor 38 moves in the horizontal direction, the hearth pieces 39 and 39 are in close contact with each other to form a series of hearths (FIG. 8A). In the case of bending along the sprocket, the hearth 1 is divided into each hearth piece 39, 39, and is shaped so as not to cause any inconvenience in the curved movement of the conveyor in the sprocket part. As shown in FIG. 8, the hearth pieces 39, 39 have stepped portions and overlap each other, and in the case of horizontal movement, an integral hearth 40 is formed in a horizontal and liquid-tight manner. Without leaking, it accumulates on the hearth and is burned by heating. Therefore, in the same manner as in Example 1, it is baked at, for example, 800 ° C. for 20 minutes to form a heat resistant composition.

  In Example 2, continuous baking can be performed to the length of the baking apparatus 35. In this case, since it can be fired even during cooling, it is almost the same as continuous firing.

  Next, if it is baked at a speed that takes 20 minutes to pass through the baking device 35, it can be continuously baked and cooled while moving continuously, so that asbestos waste is continuously baked, resulting in fire resistance. Things can be produced continuously.

  Referring to FIGS. 9A and 9B, another embodiment of the present invention will be described. The hearths 44 and 44 are equally spaced (θ = 60 degrees). A firing device 43 for heating the hearth 44 is installed above the movement trajectory of the hearths 44, 44 so as to be movable up and down. A tray 47 made of refractory metal is installed in the hearth 44.

  In the above embodiment, the firing devices 43 and 43 are installed symmetrically in diameter in FIG. 9A, and when the turntable 46 is rotated 60 degrees in the direction of arrow 48, wastes fired at the A and D positions. Move to the B and E positions, respectively, take out the tray 47 onto the guide 51, and move to the next process (refractory removal process) as indicated by arrows 49 and 49. In this case, the tray 47 is set in the hearth 44, 44 at the CF position as indicated by an arrow 53, and after the waste is supplied from the tank 52, the hearth and the tray 47 are fired. 43 is moved to the lower part.

  In the embodiment, the tray 47 is taken out from the hearth or the tray 47 is set on the hearth 44 by an automatic device (not shown). For example, a ring is provided on the upper edge of the tray 47, and it is lifted with a scissors, picked up by lifting the edge of the tray, or appropriately taken out using a conventionally known apparatus. The same applies to the installation of new trays. Since the tray is taken out or set during the firing time (intermittent stop time of the turntable), the takeout or set time is sufficient and not a rapid operation (for example, 1 to 5 minutes) but a slow operation (for example, 10 minutes or more) is sufficient, and a robot that operates accurately and reliably can be used. In the figure, 50 and 54 are bearings, 55 is a frame, 56 is a motor, and 57 and 58 are gears.

  As in the first and second embodiments, the firing device 43 is provided with an air supply pipe 53 and an exhaust pipe 55 necessary for combustion, and the exhaust pipe 55 has a cooling tower, a greenhouse, a solid-gas separation device, and the like. These devices are provided continuously, but are omitted in the same manner as in the previous embodiment.

  The third embodiment has been described as an example of continuous firing of waste, and a known technique is appropriately used as a specific structure (for example, the shape and structure of the hearth, tray take-out and setting, etc.).

The front view which abbreviate | omitted one part of the Example of this invention, and was partially cut. The top view which abbreviate | omitted a part similarly. The side view which abbreviate | omitted a part similarly. Similarly, the front view which abbreviate | omitted one part which shows the relationship between a baking apparatus and the apparatus of exhaust processing. The reduced front view which abbreviate | omitted the position which similarly shows a standby position. Explanatory drawing which similarly shows the theory of the mixing apparatus of asbestos waste and aluminum chloride compound aqueous solution. Explanatory drawing which similarly shows the Example of an exhaust-gas treatment apparatus. (A) The front view which abbreviate | omitted a part of other Example similarly, (b) The enlarged view which similarly shows the relationship between a hearth piece and a conveyor, (c) The partial cross-sectional enlarged view of a hearth. (A) The top view which abbreviate | omitted a part of other Example similarly, (b) The XX sectional drawing in (a) which abbreviate | omitted a part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hearth 2 Combustion cart 2a Base 3 Wheel 4 Rail 5 Baking device 6 Burner device 7 Wire 8 Guide tool 9 Hydraulic cylinder 10 Manufacturing device 11 Rod 12 Exhaust pipe 13 Cooling tower 14 Decrease tower 15 Exhaust duct 16 Dust collector 17 Dust collector Fan 18 Cooling position 19 Supply tower 20 Meter 21 Chimney 22 Heater 23 Discharge port 24 Product take-out port 25 Transfer pipe 26 Product tank 27 Processing tank 28 Pusher 29 Crusher 30 Storage tank 31 Stirrer 32 Crushing pump 43 Firing device 44 Furnace Floor 46 Turntable 47 Tray 52 Tank 53 Air supply pipe 55 Exhaust pipe

Claims (9)

  A hearth for firing waste containing an inorganic compound containing a treatment aqueous solution is placed on a movable frame, and a firing device having a burner is placed above the hearth with a predetermined interval facing each other. The firing apparatus is provided with a fuel supply device and an exhaust device having an exhaust treatment function, and a waste supply device is provided on the outside upper part of the combustion furnace. An apparatus for producing a heat-resistant composition by firing treatment.   A hearth for firing waste containing needle-shaped inorganic compounds impregnated with an aqueous solution containing polyaluminum chloride and organic substances, or boron compounds, ammonium hydrogen phosphate, sodium compounds and organic substances is installed on a movable platform. A firing apparatus provided with a burner above the hearth is installed so as to be movable up and down to constitute a firing furnace, and an exhaust apparatus having an exhaust treatment function is attached to the firing furnace, and the waste supply apparatus is An apparatus for producing a heat-resistant composition by firing an inorganic compound, characterized in that it is attached.   The apparatus for producing a heat-resistant composition by firing an inorganic compound according to claim 1 or 2, wherein a plurality of firing furnaces are installed in parallel, and an exhaust device is attached corresponding to each firing furnace.   3. A heat-resistant composition produced by firing an inorganic compound according to claim 1 or 2, wherein the firing furnace has a rectangular shape in plan view, and the base of the hearth is reciprocally movable in the longitudinal direction thereof. apparatus.   A hearth for firing waste containing inorganic compounds is installed in a ring-like conveyor that moves in the horizontal direction, a firing device is installed above the hearth so that it can be raised and lowered, and an exhaust device is attached to the firing device. An apparatus for producing a heat-resistant composition by firing an inorganic compound, comprising a firing furnace.   The hearth for firing the waste containing the inorganic compound containing the treatment aqueous solution is installed in the shape of an annular conveyor that moves in the horizontal direction, and the firing device is installed above the hearth so that it can be raised and lowered. By an inorganic compound calcination process, an exhaust device is attached, the conveyor is configured to be capable of moving forward and backward, and a waste supply device containing the inorganic compound is installed on one side upper part of the calcination device. Equipment for producing a heat-resistant composition.   The hearth according to claim 1 is installed at equal intervals on the upper periphery of the turntable, and a firing device capable of heating at least one hearth waste is installed on the upper part of the trajectory of the hearth so as to be movable up and down. An apparatus for producing a heat-resistant composition by a firing treatment of an inorganic compound is characterized in that the firing apparatus is provided with a treatment apparatus for exhaust gas generated during heating to constitute a firing furnace.   8. A heat-resistant composition by firing an inorganic compound according to claim 1, wherein the exhaust device is a suction duct, a cooling tower, a temperature reducing tower, a dust collector, and a dust collecting fan. Manufacturing equipment.   A heat-resistant composition produced using the apparatus according to claim 1, 2, 5, 6 or 7.

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