Production method of long-life furnace mouth brick for yellow phosphorus furnace

Abstract

The production method of the long-life furnace mouth brick for the yellow phosphorus furnace comprises the following steps: preparing all silicon carbide particles for later use; the preparation method comprises the following steps: adding the all-silicon carbide mixture into mixing and kneading equipment, uniformly mixing, adding the modified asphalt after the temperature reaches the process requirement, and continuously stirring until the mixture is uniformly mixed to form a paste material; wherein the adding amount of the modified asphalt is 7-8%; when the asphalt is added, the asphalt is added in a manner of spraying outwards from the middle inside the kneading equipment; taking the paste out of the pot, airing and extruding to form a green carbon block, and cooling and shaping the green carbon block in water; placing the green carbon blocks subjected to water cooling in a roasting furnace layer by layer for roasting; after the roasting furnace is cooled to the discharging condition, the carbon blocks are taken out layer by layer, firstly, metallurgical coke particles on the upper layer are sucked away in a negative pressure suction mode, and then the exposed roasted carbon blocks are taken out; and stacking the taken-out roasted carbon blocks, cooling to room temperature, and machining to obtain a finished product. According to the carbon block produced by the invention, the raw materials can be uniformly mixed, and the uniformity of internal and external physical and chemical indexes of the roasted carbon block is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of furnace mouth carbon brick production, in particular to a production method of long-life furnace mouth bricks for yellow phosphorus furnaces. Background Art

[0002] The furnace mouth bricks for yellow phosphorus furnaces originally used graphite electrodes, which had a service life of only 3 months. The service life was short and the graphite electrodes were expensive. The furnace had to be stopped every 3 months and the furnace mouth had to be replaced, which not only had a serious impact on production, but also increased the operating costs of the furnace. Summary of the invention

[0003] In order to solve the technical problems existing in the above-mentioned technology, it is necessary to provide a method for producing long-life furnace mouth bricks for yellow phosphorus furnace.

[0004] A method for producing long-life furnace mouth bricks for yellow phosphorus furnaces comprises the following steps: S1: Prepare all silicon carbide aggregate and powder for future use; S2: First, add the full silicon carbide mixture into the kneading equipment and mix it evenly. After the temperature reaches the process requirements, add the modified asphalt and continue to stir until the mixture is evenly mixed to form a paste; the amount of modified asphalt added is 7-8%; when adding asphalt and adhesive, add them in a way of spraying outward from the middle position inside the kneading equipment to promote full contact between the asphalt and adhesive and the silicon carbide particles and silicon carbide powder; S3: After the paste is taken out of the pot, it is dried and then injected into a forming mold. The paste is extruded by a hydraulic press to form a green carbon block, and then the green carbon block is placed in water to cool and shape; S4: Placing the water-cooled green carbon blocks layer by layer in a roasting furnace, the specific method is as follows: First, metallurgical coke particles need to be laid on the bottom of the roasting furnace as a base cushion, and then the green carbon blocks are placed on the base cushion, and a gap is kept between two adjacent green carbon blocks; each time a layer of green carbon blocks is placed, a layer of metallurgical coke particles needs to be laid on top of the green carbon blocks, and metallurgical coke particles are also filled between the green carbon blocks and the fire channel of the roasting furnace; S5: After the green carbon blocks are placed, the furnace can be sealed and fired; S6: After the roasting furnace is cooled to the condition for being taken out of the furnace, the roasted carbon blocks are taken out layer by layer. The specific method is as follows: First, the metallurgical coke particles on the upper layer are sucked away by negative pressure suction; then the exposed roasted carbon blocks are taken out; S7: stacking the taken out roasted carbon blocks and cooling them to room temperature, and using machining equipment to fine-process the roasted carbon blocks cooled to room temperature to obtain finished products.

[0005] Preferably, in step S4, the thickness of the base cushion layer is 10-15 cm.

[0006] Preferably, in step S4, the thickness of the metallurgical coke particles laid between two adjacent layers of green carbon blocks is 4-6 cm.

[0007] Preferably, in step S4, the thickness of the metallurgical coke particles laid on top of the green carbon blocks at the top layer is 25-35 cm.

[0008] Preferably, the kneading device comprises a housing, an asphalt spraying device, and a mixing device; The mixing device comprises a first transmission shaft, a second transmission shaft, and a stirring assembly; the first transmission shaft and the second transmission shaft are rotatably arranged in the housing along the length direction of the housing, the first transmission shaft is located directly above the second transmission shaft, the stirring assembly is axially equidistantly arranged on the first transmission shaft and the second transmission shaft, and the stirring assembly installed on the first transmission shaft and the stirring assembly installed on the second transmission shaft are arranged alternately; The asphalt spraying device is arranged inside the shell, and the asphalt spraying device includes an asphalt conveying pipe and a distribution pipe; the asphalt conveying pipe is arranged below the second transmission shaft along the length direction of the shell, and the distribution pipes are arranged at equal intervals along the axial direction of the first transmission shaft, and one end of the distribution pipe is connected to the asphalt conveying pipe, and a discharge hole is opened on the distribution pipe.

[0009] Preferably, the material distribution pipe is a U-shaped structure, the width of the material distribution pipe is greater than the width of the material turning assembly, and the height of the material distribution pipe is greater than the height of the material turning assembly; the material distribution pipe and the turning and stirring assembly installed on the first transmission shaft are arranged in an alternating manner.

[0010] Preferably, the stirring assembly includes a disc fixing seat, a connecting rod, and a material turning part; the disc fixing seats are correspondingly installed on the first transmission shaft and the second transmission shaft at axially equal intervals, the disc fixing seats installed on the first transmission shaft and the disc fixing seats installed on the second transmission shaft are arranged alternately, the connecting rod is installed along the radial direction of the disc fixing seat and is circumferentially evenly distributed on the outer side wall of the disc fixing seat, and the material turning part is installed at the end of the connecting rod.

[0011] Preferably, the bottom surface of the turning part where it connects with the connecting rod is flat, and the two side surfaces of the turning part are inclined toward the middle to form a dividing slope, so that the cross section of the turning part has a triangular structure.

[0012] Preferably, the two ends of the turning portion are inclined toward one side of the connecting rod to form a first cutting slope, and the lower part of the first cutting slope is inclined toward the middle of the bottom surface of the turning portion to form a second cutting surface.

[0013] Preferably, a weight-reducing hole is provided on the disc fixing seat.

[0014] Compared with the prior art, the method for producing long-life furnace mouth bricks for yellow phosphorus furnaces provided by the present invention uses metallurgical coke particles to fill between green carbon blocks, which can position the green carbon blocks, and facilitate the discharge of gas in the green carbon blocks during roasting. After roasting, the metallurgical coke particles can be used to keep the carbon blocks warm, so that the temperature of the carbon blocks can form a gradient drop. In the process of preparing the paste, the external liquid asphalt is transported to the distribution pipe through the asphalt delivery pipe through the booster pump, and the asphalt is injected from the inside of the raw material through the distribution pipe, and then the first transmission shaft and the second transmission shaft are used to drive the stirring assembly to stir and stir the raw material, so that the asphalt is mixed with the raw material from the inside to the outside, so that the asphalt and the raw material can be mixed evenly in a short time, ensuring the uniformity of the physical and chemical indicators inside and outside the carbon block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-sectional structure.

[0018] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0019] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure.

[0020] Figure 5 It is a structural schematic diagram of the connection between the asphalt spraying device and the mixing device of the present invention.

[0021] Figure 6 For the present invention Figure 5 Schematic diagram of the structure from another angle.

[0022] Figure 7 It is a schematic diagram of the structure of the stirring component of the present invention.

[0023] In the figure: shell 01, feed inlet 11, asphalt spraying device 02, asphalt conveying pipe 21, distribution pipe 22, discharge hole 23, mixing device 03, first transmission shaft 31, second transmission shaft 32, stirring assembly 33, disc fixing seat 331, connecting rod 332, turning part 333, dividing slope 334, first cutting slope 335, second cutting surface 336, weight reduction hole 337. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0026] In one embodiment, the present invention provides a method for producing long-life furnace mouth bricks for yellow phosphorus furnaces, comprising the following steps: S1: Prepare all silicon carbide aggregate and powder for future use; S2: When adding full silicon carbide mixture, there are two ways to add it; The first method is to first add all the silicon carbide mixture into the kneading equipment and mix them evenly. After the temperature reaches the process requirements, add the modified asphalt and continue to stir until the mixture is evenly mixed to form a paste. The amount of modified asphalt added is 7-8%. When adding asphalt and adhesive, they are added by spraying outward from the middle position inside the kneading equipment to promote full contact between the asphalt and adhesive and the silicon carbide particles and silicon carbide powder. The second method is to first add 1 / 3 of the total amount of the full silicon carbide mixture into the kneading equipment and mix it evenly, and then add the remaining 2 / 3 of the full silicon carbide mixture into the kneading equipment by adding the modified asphalt while adding the full silicon carbide mixture, and continue to stir until the mixture is evenly mixed to form a paste; wherein the amount of modified asphalt added is 7-8%; when adding asphalt and adhesive, they are added by spraying outward from the middle position inside the kneading equipment to promote full contact between the asphalt and adhesive and the silicon carbide particles and silicon carbide powder; S3: After the paste is taken out of the pot, the paste is cooled to 140-150°C, and then the cooled paste is injected into the forming mold, and the paste is extruded by a hydraulic press to form a green carbon block, and then the green carbon block is placed in 0-40°C water to cool for more than 3 hours to set; S4: Placing the water-cooled green carbon blocks layer by layer in a roasting furnace, the specific method is as follows: First, metallurgical coke particles need to be laid at the bottom of the roasting furnace as a basic cushion layer, and then the green carbon blocks are placed on the basic cushion layer, and a gap is maintained between two adjacent green carbon blocks; each time a layer of green carbon blocks is placed, a layer of metallurgical coke particles needs to be laid on top of the green carbon blocks, and metallurgical coke particles are also filled between the green carbon blocks and the fire channel of the roasting furnace; that is, metallurgical coke particles can be laid between the top, bottom, left and right of two adjacent green carbon blocks, so that the green carbon blocks can be positioned during roasting. During the roasting process, the gas in the green carbon blocks will be discharged due to the radiation effect of heat. Because the temperature inside the furnace is greater than the temperature outside the furnace, the gas in the green carbon blocks will continue to be discharged outward, holding up the air outside the furnace and preventing the air outside the furnace from entering; when the roasting is completed, the metallurgical coke particles can be used to keep the carbon blocks warm, so that the temperature of the carbon blocks can form a gradient drop; S5: After the green carbon blocks are placed, the furnace can be sealed and roasted; the roasting process is as follows: The green carbon block is heated to 300°C at a heating rate of no more than 5°C / h. Then, the temperature is raised to 600°C at a rate of no more than 1°C / h; Then, the temperature is raised to 1320°C at a rate of no more than 3°C / h; The carbon blocks are kept warm for at least 48 hours to form carbon blocks.

[0027] S6: After the roasting furnace is cooled to the condition for being taken out of the furnace, the roasted carbon blocks are taken out layer by layer. The specific method is as follows: First, the metallurgical coke particles on the upper layer are sucked away by negative pressure suction; then the exposed roasted carbon blocks are taken out; S7: stacking the taken out roasted carbon blocks and cooling them to room temperature, and using machining equipment to fine-process the roasted carbon blocks cooled to room temperature to obtain finished products.

[0028] Specifically, in step S4, the thickness of the base cushion layer is 10-15 cm.

[0029] Specifically, in step S4, the thickness of the metallurgical coke particles laid between two adjacent layers of green carbon blocks is 4-6 cm.

[0030] Specifically, in step S4, the thickness of the metallurgical coke particles laid on the top of the green carbon blocks at the top layer is 25-35 cm.

[0031] Please see Figures 1 to 6 , in one embodiment, comprises a housing 01, an asphalt spraying device 02, and a mixing device 03; The mixing device 03 includes a first transmission shaft 31, a second transmission shaft 32, and a stirring assembly 33; the first transmission shaft 31 and the second transmission shaft 32 are rotatably arranged in the shell 01 along the length direction of the shell 01, the first transmission shaft 31 is located directly above the second transmission shaft 32, and the stirring assembly 33 is axially equidistantly arranged on the first transmission shaft 31 and the second transmission shaft 32, and the stirring assembly 33 installed on the first transmission shaft 31 and the stirring assembly 33 installed on the second transmission shaft 32 are arranged alternately. The first transmission shaft 31 and the second transmission shaft 32 are both driven by a variable frequency motor externally arranged outside the shell 01, and the first transmission shaft 31 and the second transmission shaft 32 can rotate in the same direction or in the opposite direction; for example, when the first transmission shaft 31 rotates counterclockwise, the second transmission shaft 32 rotates clockwise, so that the raw material and asphalt can form opposite cross-type contact inside the shell 01 to a greater extent, so as to improve the mixing efficiency and promote the uniform mixing of the raw material and the asphalt.

[0032] The asphalt spraying device 02 is arranged inside the housing 01, and includes an asphalt delivery pipe 21 and a material distribution pipe 22; the asphalt delivery pipe 21 is arranged below the second transmission shaft 32 along the length direction of the housing 01, and the material distribution pipe 22 is arranged at equal intervals along the axial direction of the first transmission shaft 31, and one end of the material distribution pipe 22 is connected to the asphalt delivery pipe 21, and a discharge hole 23 is provided on the material distribution pipe 22. One end of the asphalt delivery pipe 21 extends outside the housing 01, and can be connected to an external liquid asphalt source, and the liquid asphalt can be pressurized by a booster pump and then transported to the asphalt delivery pipe 21 through a pipeline, and then transported from the asphalt delivery pipe 21 to the material distribution pipe 22. Asphalt is injected from the inside of the raw material using the distribution pipe 22, and the first transmission shaft 31 and the second transmission shaft 32 drive the stirring assembly 33 to stir and stir the raw material, so that the asphalt is mixed with the raw material from the inside to the outside, thereby achieving uniform mixing of the asphalt and the raw material in a short time, which not only shortens the mixing time and improves production efficiency, but also reduces energy consumption, achieving the company's preset quality improvement and efficiency enhancement goals.

[0033] In one embodiment, the material distribution pipe 22 is a U-shaped structure, the width of the material distribution pipe 22 is greater than the width of the material turning assembly, and the height of the material distribution pipe 22 is greater than the height of the material turning assembly.

[0034] Specifically, the feed pipe 22 and the stirring assembly 33 installed on the first transmission shaft 31 are arranged alternately. This can not only make the stirring assembly 33 interfere with the feed pipe 22, but also make the liquid asphalt sprayed from the feed pipe 22 close to the stirring assembly 33. When the first transmission shaft 31 drives the stirring assembly 33 to stir, the raw material and the asphalt can be brought into contact with each other to the maximum extent, so as to achieve the purpose of mixing.

[0035] Please see Figure 7In one embodiment, the stirring assembly 33 includes a disc fixing seat 331, a connecting rod 332, and a material turning portion 333; the disc fixing seat 331 is axially evenly installed on the first transmission shaft 31 and the second transmission shaft 32, the disc fixing seat 331 installed on the first transmission shaft 31 and the disc fixing seat 331 installed on the second transmission shaft 32 are arranged alternately, the connecting rod 332 is installed along the radial direction of the disc fixing seat 331 and is circumferentially evenly distributed on the outer side wall of the disc fixing seat 331, and the material turning portion 333 is installed at the end of the connecting rod 332.

[0036] Specifically, the bottom surface of the turning portion 333 connected to the connecting rod 332 is flat, and the two side surfaces of the turning portion 333 are inclined toward the middle to form a dividing slope 334, so that the cross section of the turning portion 333 is a triangular structure.

[0037] Specifically, the two ends of the material turning part 333 are inclined toward one side of the connecting rod 332 and form a first cutting slope 335, and the lower part of the first cutting slope 335 is inclined toward the middle of the bottom surface of the material turning part 333 and forms a second cutting surface 336. When the material turning part 333 rotates circumferentially, the first cutting slope 335 and the second cutting surface 336 of the material turning part 333 are the first to contact the raw material and asphalt. Since the top end area of ​​the two ends of the material turning part 333 is relatively small, the width and thickness gradually increase as the material turns backward. Under the impact force of the material turning part 333, the first cutting slope 335 and the second cutting surface 336 can be used to cut a gap in the raw material and asphalt, and the raw material and asphalt will spread outward; then, due to the setting of the dividing slope 334, the middle part of the material turning part 333 will be inclined toward the middle. , so that the middle part of the turning part 333 gradually narrows from bottom to top, thereby forming a knife-like structure. Under the rotation of the turning part 333, the raw material and asphalt will be divided to the two sides of the turning part 333. The dividing slope 334 is used to form a circumferential cutting effect on the raw material and asphalt, which can not only form lateral stirring, but also drive the flow of raw material and asphalt in the circumferential direction, thereby greatly increasing the mixing efficiency; secondly, the bottom surface of the turning part 333 can turn the raw material and asphalt upward, so that the raw material and asphalt can be evenly mixed in a short time.

[0038] Among them, a weight-reducing hole 337 is opened on the disc fixing seat 331. Not only can the overall weight of the disc fixing seat 331 be reduced, but also when the disc fixing seat 331 rotates, the weight-reducing hole 337 can be used to drive the raw materials and asphalt near the surfaces of the first transmission shaft 31 and the second transmission shaft 32 to flow. At this time, the raw materials and asphalt can flow circumferentially due to the centrifugal force of the disc fixing seat 331, and can also pass through the weight-reducing hole 337 to form a radial flow, so that the raw materials and asphalt near the surfaces of the first transmission shaft 31 and the second transmission shaft 32 can be contacted to the maximum extent to achieve mixing.

[0039] In one embodiment, a feed port 11 is provided at the top of the housing 01 to facilitate adding raw materials.

[0040] In one embodiment, the bottom of the shell 01 is in an arc shape, so that the material turning assembly on the second transmission shaft 32 can more easily turn the raw materials and asphalt at the bottom of the shell 01 upwards.

[0041] In one embodiment, an interlayer may be added to the outer wall of the shell 01, and an electric heating belt or other heat source, such as steam, a water medium or an oil medium with heat, may be installed in the interlayer to ensure the temperature inside the shell 01.

[0042] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A method for producing long-life furnace mouth bricks for yellow phosphorus furnaces, characterized in that: The following steps are included: S1: Prepare all silicon carbide aggregate and powder for future use; S2: First, add the full silicon carbide mixture into the kneading equipment and mix it evenly. After the temperature reaches the process requirements, add the modified asphalt and continue to stir until the mixture is evenly mixed to form a paste; the amount of modified asphalt added is 7-8%; when adding asphalt and adhesive, add them in a way of spraying outward from the middle position inside the kneading equipment to promote full contact between the asphalt and adhesive and the silicon carbide particles and silicon carbide powder; S3: After the paste is taken out of the pot, it is dried and then injected into a forming mold. The paste is extruded by a hydraulic press to form a green carbon block, and then the green carbon block is placed in water to cool and shape; S4: Placing the water-cooled green carbon blocks layer by layer in a roasting furnace, the specific method is as follows: First, metallurgical coke particles need to be laid on the bottom of the roasting furnace as a base cushion, and then the green carbon blocks are placed on the base cushion, and a gap is kept between two adjacent green carbon blocks; each time a layer of green carbon blocks is placed, a layer of metallurgical coke particles needs to be laid on top of the green carbon blocks, and metallurgical coke particles are also filled between the green carbon blocks and the fire channel of the roasting furnace; S5: After the green carbon blocks are placed, the furnace can be sealed and fired; S6: After the roasting furnace is cooled to the condition for being taken out of the furnace, the roasted carbon blocks are taken out layer by layer. The specific method is as follows: First, the metallurgical coke particles on the upper layer are sucked away by negative pressure suction; then the exposed roasted carbon blocks are taken out; S7: stacking the taken out roasted carbon blocks and cooling them to room temperature, and using machining equipment to fine-process the roasted carbon blocks cooled to room temperature to obtain finished products.

2. The method for producing long-life furnace mouth bricks for yellow phosphorus furnace according to claim 1, characterized in that: In step S4, the thickness of the base cushion layer is 10-15 cm.

3. The method for producing long-life furnace mouth bricks for yellow phosphorus furnace according to claim 1 or 2, characterized in that: In step S4, the thickness of the metallurgical coke particles laid between two adjacent layers of green carbon blocks is 4-6 cm.

4. The method for producing long-life furnace mouth bricks for yellow phosphorus furnace according to claim 3, characterized in that: In step S4, the thickness of the metallurgical coke particles laid on top of the green carbon blocks at the top layer is 25-35 cm.

5. The method for producing long-life furnace mouth bricks for yellow phosphorus furnace according to claim 1, characterized in that: The kneading device comprises a shell, an asphalt spraying device, and a mixing device; The mixing device comprises a first transmission shaft, a second transmission shaft, and a stirring assembly; the first transmission shaft and the second transmission shaft are rotatably arranged in the housing along the length direction of the housing, the first transmission shaft is located directly above the second transmission shaft, the stirring assembly is axially equidistantly arranged on the first transmission shaft and the second transmission shaft, and the stirring assembly installed on the first transmission shaft and the stirring assembly installed on the second transmission shaft are arranged alternately; The asphalt spraying device is arranged inside the shell, and the asphalt spraying device includes an asphalt conveying pipe and a distribution pipe; the asphalt conveying pipe is arranged below the second transmission shaft along the length direction of the shell, and the distribution pipes are arranged at equal intervals along the axial direction of the first transmission shaft, and one end of the distribution pipe is connected to the asphalt conveying pipe, and a discharge hole is opened on the distribution pipe.

6. The method for producing long-life furnace mouth bricks for yellow phosphorus furnace according to claim 5, characterized in that: The material distribution pipe is a U-shaped structure, the width of the material distribution pipe is greater than the width of the material turning component, and the height of the material distribution pipe is greater than the height of the material turning component; the material distribution pipe and the turning and stirring component installed on the first transmission shaft are arranged in an alternating manner.

7. The method for producing long-life furnace mouth bricks for yellow phosphorus furnace according to claim 5 or 6, characterized in that: The stirring assembly includes a disc fixing seat, a connecting rod, and a material turning part; the disc fixing seats are correspondingly installed on the first transmission shaft and the second transmission shaft at axially equal intervals, the disc fixing seats installed on the first transmission shaft and the disc fixing seats installed on the second transmission shaft are arranged alternately, the connecting rod is installed along the radial direction of the disc fixing seat and is circumferentially evenly distributed on the outer side wall of the disc fixing seat, and the material turning part is installed at the end of the connecting rod.

8. The method for producing long-life furnace mouth bricks for yellow phosphorus furnace according to claim 7, characterized in that: The bottom surface of the turning part connected with the connecting rod is flat, and the two side surfaces of the turning part are inclined toward the middle and form a dividing slope surface, so that the cross section of the turning part is a triangular structure.

9. The method for producing long-life furnace mouth bricks for yellow phosphorus furnace according to claim 8, characterized in that: The two ends of the turning part are inclined toward one side of the connecting rod to form a first cutting slope, and the lower part of the first cutting slope is inclined toward the middle of the bottom surface of the turning part to form a second cutting surface.

10. The method for producing long-life furnace mouth bricks for yellow phosphorus furnace according to claim 5, characterized in that: The disc fixing seat is provided with a weight-reducing hole.

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