A model for rebuilding the inner lining of a pouring furnace hearth and a method for rebuilding the inner lining of a pouring furnace hearth using the model

Abstract

This invention discloses a model for repairing the lining of a tilting furnace hearth and a method for doing so, comprising: a main machine, a support plate, a connecting rod, an outer shell, and a container. Compared with traditional models and methods for repairing the lining of a tilting furnace hearth, this equipment can pour and repair the inner shell layer by layer during use. Furthermore, the innovative adjustment of the repair method fully utilizes the high melting point of graphite carbon bricks. Once the corundum furnace lining is corroded by high-temperature solutions and ferrosilicon alloys, the graphite carbon bricks effectively isolate the tendency for further corrosion and provide a cooling effect. This completely solves the major safety hazard of explosions that can easily occur when solutions or ferrosilicon alloys penetrate the hearth and come into contact with circulating water. It also allows for pressing and positioning of the container and the material itself, ensuring the stability of the equipment during operation, accelerating the melting speed of the material, and improving the equipment's working efficiency.

Description

Technical Field

[0001] This invention relates to the field of tilting furnace hearth lining repair, and more particularly to a tilting furnace hearth lining repair model and a repair method using the model. Background Technology

[0002] The original lining method of tilting furnace can reduce edge chipping caused by high-temperature solutions or ferrosilicon alloys during smelting operations, thus protecting the hearth to some extent. However, since the material used for the hearth lining is the same as that used in the main production process, the electrode auxiliary heating energy is relatively large during smelting (corundum smelting, the refining temperature reaches above 2500 degrees Celsius, and the melting point of corundum is 2050 degrees Celsius). This can easily damage the furnace lining of the same material. Once the furnace lining is damaged, the area will expand under the erosion of high-temperature solutions and ferrosilicon alloys, which can easily lead to furnace penetration. If it encounters the outer wall circulating cooling water jacket, the gas will expand rapidly at high temperatures in a short period of time, which can cause explosions and other major safety accidents. In severe cases, the furnace must be shut down immediately.

[0003] Therefore, it is necessary to provide a new model for repairing the lining of a tilting furnace hearth and a repair method using this model to solve the above-mentioned technical problems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a lining repair model for a tilting furnace hearth that isolates corrosion and automatically cools down, as well as a repair method using the model.

[0005] The tilting furnace hearth lining repair model and repair method using the model provided by the present invention include: a main machine, a support plate, connecting rods, an outer shell, and a container. The support plate is symmetrically fixedly installed on the side of the main machine. The connecting rods are symmetrically fixedly installed on the side of the main machine at the top of the support plate. The outer shell is fixedly installed between the connecting rods. The container is fixedly installed inside the outer shell. An isolation device is fixedly installed inside the outer shell. The isolation device includes a padding layer, a castable refractory, and a fixing model. The padding layer is fixedly installed at the bottom of the inner shell. The castable refractory is fixedly installed at the top of the padding layer. The fixing model is set in the middle of the castable refractory. A pressing device is fixedly installed on the side of the outer shell. A positioning device is fixedly installed on the side of the outer shell next to the pressing device.

[0006] Preferably, the bottom of the main body is fixedly equipped with rollers, and the bottom of the support plate is fixedly equipped with a support base, which facilitates the overall movement and adjustment of the main body during use, and makes it more stable during subsequent positioning.

[0007] Preferably, the isolation device further includes a corundum pad, a corundum binding material, a graphite carbon brick, and a binding material. The corundum pad is symmetrically fixedly installed inside the outer shell on the surface of the castable. The corundum binding material is fixedly installed on the side of the corundum pad. The graphite carbon brick is symmetrically arranged on the side of the corundum binding material near the container. The binding material is arranged between the graphite carbon brick and the container.

[0008] Preferably, the entire underlayment is made of asbestos felt material, and the laying area covers the entire hemispherical bottom. The castable material is made of brown corundum five-segment sand. During use, the properties of asbestos felt are utilized to achieve a breathable effect, and due to the material limitations of the castable, the tendency to continue to erode is prevented.

[0009] Preferably, the corundum pad is made of brown corundum four-segment sand. The chemical composition of the corundum pad itself is Al2O3 ≥ 95.5% and Fe2O3 ≤ 0.2%, with a ratio of 200 mesh: 0-1:1-3:3-5:5-8 = 0.5:0.5:2:3:4. It is mixed evenly with 50% phosphoric acid. The mixed material should be able to be formed into a ball by hand and fall naturally without breaking apart, which can better insulate and protect against internal temperature.

[0010] Preferably, the two layers of graphite carbon bricks are arranged in a cross pattern. The laying method of the graphite carbon bricks varies depending on the protected area.

[0011] Preferably, the pressing device includes a protective shell, a sliding groove, a slider, a rotating block, a connecting rod, a pressing plate, and a first spring. The protective shell is fixedly installed on the side of the outer shell, and a sliding groove is opened inside the protective shell. The slider is slidably installed inside the sliding groove. A rotating block is fixedly installed on the side of the slider. A connecting rod is rotatably installed inside the rotating block. A pressing plate is fixedly installed at the end of the connecting rod. The slider is elastically connected to the sliding groove through the first spring.

[0012] Preferably, the pressing plate is round in shape, which allows it to fit better with the container during use and makes the material compression more stable and accurate.

[0013] Preferably, the positioning device includes a base, a rotating seat, a rotating rod, a rotating block, a torsion spring, and a positioning rod. The base is fixedly installed on the side of the outer shell, the rotating seat is fixedly installed on the surface of the base, the rotating rod is rotatably installed inside the rotating seat, the rotating block is fixedly installed outside the rotating rod, torsion springs are symmetrically sleeved on both sides of the rotating block outside the rotating rod, and the positioning rod is fixedly installed on the side of the rotating block.

[0014] The preferred method for repairing the lining of the tilting furnace hearth comprises the following steps: Step 1: Laying. A layer of asbestos felt is laid on the surface of the bottom steel plate, covering the entire hemispherical bottom. The purpose of the asbestos felt is to provide breathability. Step 2: Casting and knotting. Afterwards, the castable material is knotted on the upper part of the asbestos felt (the castable material is made of brown corundum five-segment sand, with a chemical composition of Al2O3 ≥ 95.5% and Fe2O3 ≤ 0.2%, and the ratio is 200 mesh: 0-1:1-3:3-5:5-8 = 0.5:0.5:2:3:4, and it is mixed evenly with 50% phosphoric acid). The knotting height is 140-150mm thick from the bottom center point upwards, and the knotting layer is kept flat, and the upper surface is flush with or slightly lower than the upper end of the furnace hearth hemisphere. Step 3: Fixing and installing the inner lining fixing model (the model size is a cylindrical annular support plate with a diameter of 340-380mm and a height of 200-210mm). After the annular mold is installed and fixed, use castable and graphite carbon bricks to build a lining between the model and the outer wall of the furnace hearth (the lining thickness is 600-800mm). Step 4: In the furnace nozzle area, first, from bottom to top, tie a 500-600mm thick corundum lining layer (the corundum castable uses brown corundum four-segment sand material, with a chemical composition of Al2O3 ≥ 95.5% and Fe2O3 ≤ 0.2%, and a mixing ratio of 200 mesh: 0-1:1-3:3-5:5-8 = 0.5:0.5:2:3:4, and mix it evenly with 50% phosphoric acid. The mixed castable should be able to be formed into a ball by hand and fall naturally without crumbling). After tying the lining layer, starting from the inner wall of the furnace, arrange and build the lining materials from the outside in. Tie a 150-200mm thick corundum lining material close to the outer wall of the furnace, then lay two layers of graphite carbon bricks (the two layers of graphite carbon bricks are arranged in a cross pattern to prevent the solution from seeping into the gaps between the bricks). The gaps continue to erode outwards. The carbon bricks are 300mm long, 300-400mm high, and 150-200mm thick (the final size of the graphite carbon bricks is determined according to the furnace lining process). The space between the graphite carbon bricks and the model is filled with binding material to ensure that the thickness of the interlayer between the models on the inner wall of the furnace hearth is 600-800mm. After the first layer is completed, the second layer of materials is laid and built from bottom to top. After the upper and lower layers are completely bound and thickened, the top layer is covered and built with corundum castable until the opening at the top of the furnace hearth. At this time, the entire furnace nozzle area is completed. Step 5: For the remaining areas, the construction method for the annular area outside the nozzle area is similar to that for the nozzle belt area. The difference is that in the nozzle fan-shaped area, two layers of graphite carbon bricks are distributed alternately from the outside to the inside, while outside the fan-shaped area, a layer of graphite carbon bricks is arranged between the binding materials from the outside to the inside (the main reason is that the probability and degree of corrosion from electrode heat radiation, high-temperature solutions and ferrosilicon alloys outside the fan-shaped area are relatively small, and a single layer of graphite bricks can meet the usage requirements). The remaining construction methods and material arrangements are the same as those for the nozzle construction.

[0015] Compared with related technologies, the tilting furnace hearth lining repair model and the repair method using the model provided by the present invention have the following beneficial effects: This invention provides a model for repairing the lining of a tilting furnace hearth and a repair method using this model. During use, an isolation device allows for layer-by-layer pouring and repair of the inner shell. The innovative repair method fully utilizes the high melting point of graphite carbon bricks. Once the corundum furnace lining is corroded by high-temperature solutions and ferrosilicon alloys, the graphite carbon bricks effectively prevent further corrosion and provide a cooling effect, thus better protecting the hearth lining. This also completely solves the major safety hazard of explosions that can easily occur when solutions or ferrosilicon alloys penetrate the hearth and come into contact with circulating water, ensuring safe and stable production operation.

[0016] This invention provides a model for lining the hearth of a tilting furnace and a method for lining using the model. During use, the positioning and pressing devices can press and position the container and the material itself, ensuring the stability of the equipment during operation, accelerating the melting speed of the material, and improving the working efficiency of the equipment. Attached Figure Description

[0017] Figure 1 This is one of the schematic diagrams of the overall structure of the present invention; Figure 2 This is the second schematic diagram of the overall structure of the present invention; Figure 3 This is the third schematic diagram of the overall structure of the present invention; Figure 4 This is a schematic diagram of the isolation device of the present invention; Figure 5 This is a schematic diagram of the pressing device of the present invention; Figure 6 This is a schematic diagram of the positioning device of the present invention.

[0018] The diagram is labeled as follows: 1. Main body; 2. Support plate; 3. Connecting rod; 4. Outer shell; 5. Container; 6. Isolation device; 61. Padding layer; 62. Castable refractory; 63. Fixed model; 64. Corundum pad layer; 65. Corundum binding material; 66. Graphite carbon brick; 67. Binding material; 7. Pressing device; 71. Protective shell; 72. Slide groove; 73. Sliding block; 74. Rotating block; 75. Connecting rod; 76. Pressing plate; 77. First spring; 8. Positioning device; 81. Base; 82. Rotating seat; 83. Rotating rod; 84. Rotating block; 85. Torsion spring; 86. Positioning rod. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] The specific implementation of the present invention will be described in detail below with reference to specific embodiments. Example

[0021] Please see Figure 1 , Figure 2 and Figure 3 The present invention provides a model for repairing the lining of a tilting furnace hearth and a method for repairing the model, comprising: a main body 1, a support plate 2, connecting rods 3, a shell 4, and a container 5. The support plate 2 is symmetrically fixedly installed on the side of the main body 1. The connecting rods 3 are symmetrically fixedly installed on the side of the main body 1 at the top of the support plate 2. The shell 4 is fixedly installed between the connecting rods 3. The container 5 is fixedly installed inside the shell 4. An isolation device 6 is fixedly installed inside the shell 4. The isolation device 6 includes a padding layer 61, a castable refractory 62, and a fixing model 63. The padding layer 61 is fixedly installed at the bottom inside the shell 4. The castable refractory 62 is fixedly installed at the top of the padding layer 61 inside the shell 4. The fixing model 63 is set in the middle of the castable refractory 62. A pressing device 7 is fixedly installed on the side of the shell 4. A positioning device 8 is fixedly installed on the side of the shell 4 at the side of the pressing device 7.

[0022] In use, the equipment is placed at the target location, and the isolation device 6 is laid layer by layer and step by step according to its own usage method. Then, the container 5 is fixed at the target location, and the material to be processed is placed inside the container 5. The container 5 is heated as a whole by starting the main machine 1. Then, the side of the container 5 is positioned by the use of the positioning device 8 to prevent loosening. And because of the use of the pressing device 7, the internal material is quickly melted, making the equipment's performance more perfect.

[0023] Please see Figure 1 The main body 1 is fixedly equipped with rollers at the bottom and the support plate 2 is fixedly equipped with a support base at the bottom, which facilitates the overall movement and adjustment of the main body 1 during use and makes it more stable during subsequent positioning.

[0024] Please see Figure 4 The isolation device 6 also includes a corundum pad 64, a corundum binding material 65, a graphite carbon brick 66, and a binding material 67. The corundum pad 64 is symmetrically fixedly installed inside the outer shell 4 on the surface of the castable 62. The corundum binding material 65 is fixedly installed on the side of the corundum pad 64. The graphite carbon brick 66 is symmetrically arranged on the side of the corundum binding material 65 near the container 5. The binding material 67 is arranged between the graphite carbon brick 66 and the container 5.

[0025] During use, the outer shell 4 is covered with a base layer 61 and a castable refractory 62 to ensure the heat dissipation and stability of the equipment. Then, the side of the container 5 is covered with a corundum base layer 64 and a corundum binding material 65. With the help of graphite carbon bricks 66, the furnace nozzle and side areas of the container 5 are covered separately to meet different smelting requirements and better assist the equipment in use.

[0026] Please see Figure 4 The paving layer 61 is made entirely of asbestos felt material and covers the entire hemispherical bottom. The castable refractory 62 is made of brown corundum five-segment sand material. During use, the properties of asbestos felt are utilized to achieve a breathable effect, and due to the material limitations of the castable refractory 62, the tendency to continue to erode is prevented.

[0027] Please see Figure 4 The corundum pad 64 is made of brown corundum four-segment sand. The chemical composition of the corundum pad 64 itself is Al2O3 ≥ 95.5% and Fe2O3 ≤ 0.2%. The ratio is 200 mesh: 0-1:1-3:3-5:5-8 = 0.5:0.5:2:3:4. It is mixed evenly with 50% phosphoric acid. The mixed material should be able to be formed into a ball by hand and fall naturally without falling apart, so as to better insulate and protect against internal temperature.

[0028] Please see Figure 4 The two layers of graphite carbon bricks 66 are arranged in a cross pattern. The laying method of graphite carbon bricks 66 varies depending on the protected area.

[0029] Please see Figure 5 The pressing device 7 includes a protective shell 71, a sliding groove 72, a slider 73, a rotating block 74, a connecting rod 75, a pressing plate 76, and a first spring 77. The protective shell 71 is fixedly installed on the side of the outer shell 4. The sliding groove 72 is opened inside the protective shell 71. The slider 73 is slidably installed inside the sliding groove 72. The rotating block 74 is fixedly installed on the side of the slider 73. The connecting rod 75 is rotatably installed inside the rotating block 74. The pressing plate 76 is fixedly installed at the end of the connecting rod 75. The slider 73 is elastically connected to the sliding groove 72 through the first spring 77.

[0030] During use, by pulling the connecting rod 75, the slider 73 slides in the groove 72. When it moves to the target height, the angle of the pressing plate 76 is adjusted by the cooperation of the rotating block 74. Then, under the action of the first spring 77, the pressing plate 76 squeezes and limits the material at the bottom end to ensure the stability of the material during subsequent processing.

[0031] Please see Figure 5 The pressing plate 76 is round in shape, which allows it to fit better with the container 5 during use, making the material compression more stable and accurate.

[0032] Please see Figure 6 The positioning device 8 includes a base 81, a rotating seat 82, a rotating rod 83, a rotating block 84, a torsion spring 85, and a positioning rod 86. The base 81 is fixedly installed on the side of the outer shell 4. The rotating seat 82 is fixedly installed on the surface of the base 81. The rotating rod 83 is rotatably installed inside the rotating seat 82. The rotating block 84 is fixedly installed outside the rotating rod 83. Torsion springs 85 are symmetrically sleeved on both sides of the rotating block 84 outside the rotating rod 83. The positioning rod 86 is fixedly installed on the side of the rotating block 84.

[0033] During use, the rotating seat 82 is used to adjust the angle of the rotating rod 83 to drive the positioning rod 86. Then, under the action of the torsion spring 85, the positioning rod 86 moves downward to press and position the edge of the container 5 at the bottom.

[0034] Please see Figures 1 to 6 The repair method for the inner lining of the tilting furnace hearth, and its steps are as follows: Step 1: Laying. A layer of asbestos felt is laid on the surface of the bottom steel plate, covering the entire hemispherical bottom. The purpose of the asbestos felt is to provide breathability. Step 2: Casting and knotting. Afterwards, cast refractory 62 is used to knot the upper part of the asbestos felt (the cast refractory is made of brown corundum five-segment sand, with a chemical composition of Al2O3 ≥ 95.5% and Fe2O3 ≤ 0.2%, and the ratio is 200 mesh: 0-1:1-3:3-5:5-8 = 0.5:0.5:2:3:4, and is mixed evenly with 50% phosphoric acid). The knotting height is about 140-150mm thick from the bottom center point upwards, and the knotting layer is kept flat, with the upper surface flush with or slightly lower than the upper end of the furnace hearth hemisphere. Step 3: Fixing and installing the inner lining fixing model 63 (the model size is a cylindrical annular support plate with a diameter of 340-380mm and a height of 200-210mm). After the annular mold is installed and fixed, use castable 62 and graphite carbon bricks 66 to build between the model and the outer wall of the furnace hearth (the building thickness is 600-800mm). Step 4: In the furnace nozzle area, first, from bottom to top, tie a 500-600mm thick corundum liner 64 (the corundum castable uses brown corundum four-segment sand material, with a chemical composition of Al2O3 ≥ 95.5% and Fe2O3 ≤ 0.2%, and a mixing ratio of 200 mesh: 0-1:1-3:3-5:5-8 = 0.5:0.5:2:3:4, and mix it evenly with 50% phosphoric acid. The mixed castable should be able to be formed into a ball by hand and fall naturally without crumbling). After tying the liner, starting from the inner wall of the furnace, arrange and build the lining materials from the outside in. Tie a 150-200mm thick corundum lining material 65 close to the outer wall of the furnace. Then, arrange two layers of graphite carbon bricks 66 (the two layers of graphite carbon bricks are arranged in a cross pattern to prevent the solution from seeping into the gaps between the bricks). The carbon bricks are continuously eroded outwards. The dimensions of the carbon bricks are 300mm in length, 300-400mm in height, and 150-200mm in thickness (the final dimensions of the graphite carbon bricks are determined according to the furnace lining process). The space between the graphite carbon bricks 66 and the model is filled with binding material 67 to ensure that the thickness of the interlayer between the models on the inner wall of the furnace is 600-800mm. After the first layer is completed, the second layer of materials is laid and built from bottom to top. After the upper and lower layers are completely bound, the top layer is covered and built with corundum binding material 65. The building thickness extends to the opening at the top of the furnace. At this point, the entire furnace nozzle area is built. Step 5: For the remaining areas, the construction method for the annular area outside the nozzle area is similar to that for the nozzle belt area. The difference is that in the nozzle fan-shaped area, two layers of graphite carbon bricks 66 are distributed in a crisscross pattern from the outside to the inside, while outside the fan-shaped area, a layer of graphite carbon bricks 66 is arranged between the binding materials from the outside to the inside (the main reason is that the probability and degree of corrosion from electrode heat radiation, high-temperature solutions and ferrosilicon alloys outside the fan-shaped area are relatively small, and a single layer of graphite bricks can meet the usage requirements). The remaining construction methods and material arrangements are the same as those for the nozzle construction. Example

[0035] Please participate Figure 1 The bottom of the outer casing 4 is equipped with a heating element, which can better heat and process materials during use.

[0036] The working principle of the tilting furnace hearth lining repair model and the repair method using the model provided by this invention is as follows: When using this equipment, it is placed in the target position, and then, through its own operating method, the isolation device 6 is laid layer by layer. The outer shell 4 is laid around its perimeter and bottom using the lining layer 61 and castable refractory 62 to ensure the equipment's heat dissipation and stability. Then, the side portion of the container 5 is lining the corundum pad layer 64 and corundum binding material 65 through laying and casting. Furthermore, due to the cooperation of graphite carbon bricks 66, the furnace nozzle and side areas of the container 5 are laid separately to meet different smelting requirements, better assisting the equipment in its use. The container 5 is then fixed in the target position, and the material to be processed is placed inside the container 5. The main machine 1 is then started. The container 5 is heated as a whole, and then the side of the container 5 is positioned by the positioning device 8. With the cooperation of the rotating seat 82, the rotating rod 83 drives the positioning rod 86 to adjust the angle. Then, under the action of the torsion spring 85, the positioning rod 86 moves downward to press and position the edge of the container 5 at the bottom to prevent loosening. The use of the pressing device 7 facilitates the rapid melting of the internal material. By pulling the connecting rod 75, the slider 73 slides in the slide groove 72. When it moves to the target height, the angle of the pressing plate 76 is adjusted by the cooperation of the rotating block 74. Then, under the action of the first spring 77, the pressing plate 76 squeezes and limits the material at the bottom to ensure the stability of subsequent material processing and make the equipment itself more perfect.

[0037] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0038] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A model for lining the hearth of a tilting furnace, comprising: The main body (1) has support plates (2) symmetrically fixedly installed on its side. Connecting rod (3), the connecting rod (3) is symmetrically fixedly installed on the side of the main body (1) at the top of the support plate (2); The outer casing (4) is fixedly installed between the connecting rods (3); Container (5), which is fixedly installed inside the outer shell (4); Its features are, An isolation device (6) is fixedly installed inside the outer shell (4). The isolation device (6) includes a padding layer (61), a casting material (62), and a fixing model (63). The padding layer (61) is fixedly installed at the bottom inside the outer shell (4). The casting material (62) is fixedly installed at the top of the padding layer (61) inside the outer shell (4). The fixing model (63) is provided in the middle of the casting material (62). Pressing device (7), which is fixedly installed on the side of the outer casing (4); Positioning device (8), which is fixedly installed on the side of the outer shell (4) on the side of the pressing device (7); The isolation device (6) further includes a corundum pad (64), corundum binding material (65), graphite carbon brick (66) and binding material (67). The corundum pad (64) is symmetrically fixedly installed inside the outer shell (4) on the surface of the castable (62). The corundum binding material (65) is fixedly installed on the side of the corundum pad (64). Graphite carbon brick (66) is symmetrically arranged on the side of the corundum binding material (65) near the container (5). Binding material (67) is arranged between the graphite carbon brick (66) and the container (5).

2. The tilting furnace hearth lining repair model according to claim 1, characterized in that, The main body (1) is fixedly equipped with rollers at the bottom end, and the support plate (2) is fixedly equipped with a support base at the bottom end.

3. The tilting furnace hearth lining repair model according to claim 1, characterized in that, The paving layer (61) is made of asbestos felt material and the paving area covers the entire hemispherical bottom. The casting material (62) is made of brown corundum five-segment sand.

4. The tilting furnace hearth lining repair model according to claim 1, characterized in that, The corundum pad (64) is made of brown corundum four-segment sand material.

5. The tilting furnace hearth lining repair model according to claim 4, characterized in that, The two layers of graphite carbon bricks (66) are arranged in a cross-shaped manner.

6. The tilting furnace hearth lining repair model according to claim 1, characterized in that, The pressing device (7) includes a protective shell (71), a sliding groove (72), a slider (73), a rotating block (74), a connecting rod (75), a pressing plate (76), and a first spring (77). The protective shell (71) is fixedly installed on the side of the outer shell (4). The sliding groove (72) is opened inside the protective shell (71). The slider (73) is slidably installed inside the sliding groove (72). The rotating block (74) is fixedly installed on the side of the slider (73). The connecting rod (75) is rotatably installed inside the rotating block (74). The pressing plate (76) is fixedly installed at the end of the connecting rod (75). The slider (73) is elastically connected to the sliding groove (72) through the first spring (77).

7. The tilting furnace hearth lining repair model according to claim 6, characterized in that, The pressing plate (76) is round in shape.

8. The tilting furnace hearth lining repair model according to claim 1, characterized in that, The positioning device (8) includes a base (81), a rotating seat (82), a rotating rod (83), a rotating block (84), a torsion spring (85), and a positioning rod (86). The base (81) is fixedly installed on the side of the outer shell (4). The rotating seat (82) is fixedly installed on the surface of the base (81). The rotating rod (83) is rotatably installed inside the rotating seat (82). The rotating block (84) is fixedly installed outside the rotating rod (83). The torsion springs (85) are symmetrically sleeved on both sides of the rotating block (84) outside the rotating rod (83). The positioning rod (86) is fixedly installed on the side of the rotating block (84).

9. The method for repairing the lining of a tilting furnace hearth according to any one of claims 1 to 8, characterized in that, The steps are as follows: Step 1: Laying. A layer of asbestos felt is laid on the surface of the bottom steel plate, covering the entire hemispherical bottom. The purpose of the asbestos felt is to provide breathability. Step 2: Casting and knotting. Then, cast the refractory material (62) on the upper part of the asbestos felt and knot it. The knotting height is 140-150mm thick from the bottom center point upwards. Keep the knotting layer flat and the upper surface is flush with or slightly lower than the upper end of the furnace hearth hemisphere. Step 3: Fixing and installing the inner lining fixing model (63). After the ring mold is installed and fixed, the model is repaired between the furnace hearth outer wall using castable material (62) and graphite carbon bricks (66). Step 4: In the furnace nozzle area, first tie a 500-600mm thick corundum pad (64) from bottom to top. After the pad is tied, start from the inner wall of the furnace and arrange and build the tying materials from the outside to the inside. Tie a 150-200mm thick corundum tying material (65) close to the outer wall of the furnace. Then arrange two layers of graphite carbon bricks (66). Use tying material (67) to fill the gap between the graphite carbon bricks (66) and the model to ensure that the thickness of the interlayer between the inner wall of the furnace and the model is 600-800mm. After the first layer is arranged, arrange and build the second layer of materials from bottom to top. After the upper and lower layers are all tied, cover and build the top layer with corundum tying material (65) until the opening at the top of the furnace. At this time, the entire furnace nozzle area is built. Step 5: For the remaining areas, the construction method for the annular area outside the nozzle area is similar to that for the nozzle belt area. The difference is that two layers of graphite carbon bricks (66) are distributed in a crisscross pattern from the outside to the inside in the nozzle fan-shaped area, while a layer of graphite carbon bricks (66) is arranged between the binding materials from the outside to the inside outside the fan-shaped area. The remaining construction methods and material arrangements are the same as those for the nozzle construction.

Images