A furnace construction method for increasing the service life of furnace lining

Abstract

The present invention relates to the field of furnace lining manufacturing, and in particular to a furnace building method for improving the service life of the furnace lining, comprising: S1, installing a ground wire on the furnace bottom; S2, laying mica paper on the furnace bottom and the inner side of the furnace wall; S3, adding refractory materials into the furnace bottom three times to obtain a furnace bottom material layer, and using a tool to degas and compact each time; S4, using a flat plate furnace vibrator matching the inner diameter of the furnace wall to sequentially pound the furnace bottom material layer in the order of large (6Kg / cm2), medium (4Kg / cm2), small (1.5Kg / cm2) ) The three pressure parameters are vibrated for 20 minutes, 10 minutes and 10 minutes respectively. After the vibration is completed, the flat plate furnace vibrator is pulled out during the vibration; S5, the crucible mold is placed at the center of the furnace bottom, and refractory materials are added into the gap formed by the outer wall of the crucible mold and the furnace wall by auxiliary furnace building tools in 10-15 times to finally form a furnace charge wall layer, and the auxiliary furnace building tools are used to vibrate after each addition of materials, etc.; Compared with the traditional method, the furnace lining prepared by the present invention significantly improves the service life of the furnace lining and reduces the production cost.

Description

Technical Field

[0001] The invention relates to the field of furnace lining manufacturing, in particular to a furnace building method for increasing the service life of the furnace lining. Background Art

[0002] The lining refers to the refractory layer built inside the metal shell of the converter. The main function of the converter lining is to provide a durable container for high-temperature metallurgical melts to complete steelmaking reactions. The lining is currently made of various high-aluminum corundum and high-quality magnesia as the main raw materials, using dry vibration and investment casting technology to build the furnace. However, due to the different experience of the furnace builders and the different control of the furnace building process parameters, the existing furnace lining service life is unstable, the lining life is short, the furnace building is frequent, and the ton of molten steel / iron consumes more refractory materials, and the cost is high. Based on the above defects, the present invention controls the furnace building process parameters and requires the boiler operator to cooperate with relevant operations during the furnace operation process. The two aspects are combined to jointly improve the life of the lining. It meets the company's requirements for cost reduction, is easy to monitor, and is simple to operate and convenient for on-site construction. At the same time, the use of auxiliary furnace building tools in the furnace building process replaces the traditional purely manual feeding, tamping, and vibration process, which also greatly improves the furnace building efficiency. Summary of the invention

[0003] In view of this, the present invention provides a furnace building method for improving the service life of the furnace lining. By strictly controlling the furnace building process parameters, the furnace building process is standardized. Our company tracks and counts the service life of the furnace lining made by the present invention, which significantly improves the service life of the furnace lining.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A furnace construction method for increasing the service life of a furnace lining comprises the following steps:

[0006] S1. Install ground wire at the bottom of the furnace;

[0007] S2. Lay mica paper on the bottom and inner side of the furnace wall;

[0008] S3, adding refractory materials into the furnace bottom three times to obtain a furnace bottom material layer, and using tools to degas and compact each time;

[0009] S4. Use a flat plate furnace vibrator that matches the inner diameter of the furnace wall to shake the furnace bottom material layer in accordance with the maximum (6Kg / cm 2 ), medium (4Kg / cm 2 ), small (1.5Kg / cm 2 ) The three pressure parameters are vibrated for 20 minutes, 10 minutes, and 10 minutes respectively. After the vibration is completed, the flat plate vibrator is pulled out during the vibration;

[0010] S5, placing the crucible mold at the center of the furnace bottom, adding refractory materials into the gap formed by the outer wall of the crucible mold and the furnace wall by auxiliary furnace building tools in 10-15 times to finally form a furnace charge wall layer, and vibrating with the auxiliary furnace building tools after each addition;

[0011] S6. Place the two-hammer furnace wall vibration device into the bottom of the crucible mold furnace and set the vibration pressure to 6Kg / cm 2 , from bottom to top, lift the vibration equipment upward once every 8-10 minutes, the lifting distance is the vibration distance of the vibration equipment, when the wall layer of the furnace charge sinks during the vibration, add refractory materials at any time, when the wall layer of the furnace charge does not sink, no need to add materials, when the vibration equipment rises to 200-400mm from the top of the crucible mold, adjust the vibration pressure to 1-1.5Kg / cm 2 , Do not vibrate too much towards the top to prevent the top furnace wall material layer from loosening. After vibrating for 8-10 minutes, turn off the vibration equipment and take it out;

[0012] S7. Sinter the furnace lining made by the ascending method and it can be used.

[0013] Furthermore, in step S1, the ground wire is preferably a stainless steel wire with a diameter of 2-5 mm.

[0014] Furthermore, in step S3, the added refractory material is a neutral refractory material, and the high temperature resistance of the neutral refractory material is 1700-1780°C, which meets the melting temperature of heat-resistant steel; the neutral refractory material is made of fused corundum, high-purity magnesia, and high-purity spinel as main materials, and composite additives as auxiliary materials, wherein the composite additives are sintering agents.

[0015] Furthermore, in step S5, the gap between the outer wall of the crucible mold and the inner wall of the furnace lining is one-third of the furnace bottom material layer, and the furnace wall material layer is added in 15 times, and the material body is vibrated and compacted each time.

[0016] Further, in step S6, the vibration pressure of the second hammer furnace wall vibration device is set to 6Kg / cm 2 , every 8 minutes of vibration, lift the vibration device upwards by 100-120cm, when the vibration device is lifted to 300mm from the top of the crucible mold, reduce the vibration pressure to 1.5Kg / cm 2 , to prevent the upper furnace wall material layer from loosening, vibrate here for 8 minutes, then turn off the vibration equipment and take it out.

[0017] Further, in step S5, the auxiliary furnace building tool includes: a barrel, a material discharge assembly and an adjustment assembly;

[0018] Barrel: Its outer side is rotatably connected to the inner wall of the circular groove set in the middle of the bracket. A cover plate is provided at the upper opening of the barrel. A hopper is provided at the feeding port set at the edge of the cover plate. An inner barrel is provided in the installation port at the center of the cover plate. The inner barrel and the barrel are coaxially arranged.

[0019] Feeding assembly: its upper end is slidably connected with the sliding hole correspondingly arranged in the middle of the cover plate, and the lower end of the feeding assembly is located in the gap between the barrel and the inner barrel;

[0020] Adjustment component: It is arranged on the upper surface of the bracket, and round rods are evenly arranged in the middle of the adjustment component. The lower ends of the round rods are slidably connected to the feeding component. Vibration rods are arranged at the lower ends of the round rods. The input end of the vibration rod is electrically connected to the output end of the controller, which can concentrically fix the crucible mold and the furnace lining. When building the furnace, the charge can be spread automatically, and the spreading of the charge is more uniform. After the spreading is completed, the charge can be automatically vibrated at multiple angles, which greatly improves the efficiency of furnace building.

[0021] Furthermore, a controller is provided on the right side of the bracket, and an input end of the controller is electrically connected to an external power supply to ensure the normal operation of the circuit.

[0022] Furthermore, the material unloading assembly includes a sliding sleeve and an annular sealing plug. The sliding sleeves are arranged in the evenly arranged openings in the middle of the annular sealing plug. The annular sealing plug is located in the gap between the barrel and the inner barrel. The sliding sleeves are slidably connected to the corresponding sliding holes in the middle of the cover plate. The lower ends of the round rods are slidably connected to the vertically corresponding sliding sleeves. The upper ends of the sliding sleeves are fixedly connected to the connecting frame. A third motor is arranged in the middle of the upper surface of the cover plate. A second screw is arranged on the upper end of the output shaft of the third motor. The second screw is threadedly connected to the screw hole in the middle of the connecting frame. The input end of the third motor is electrically connected to the output end of the controller to facilitate automatic spreading of the charge.

[0023] Furthermore, the outer side surface of the inner cylinder is rotatably connected with a rotating sleeve, the inner wall of the barrel is rotatably connected with a rotating drum, and paddles are evenly spaced at the lower ends of the rotating sleeve and the rotating drum to make the scattering of the charge more uniform.

[0024] Furthermore, a second motor is provided at the edge of the upper surface of the cover plate, the output shaft of the second motor passes through the avoidance opening at the edge of the cover plate and is provided with a driving gear at the lower end, the upper end of the rotating sleeve is provided with a linkage gear meshing with the driving gear, and the upper end of the inner wall of the rotating drum is provided with a gear ring meshing with the driving gear, and the input end of the second motor is electrically connected to the output end of the controller to provide driving force for the rotation of the rotating sleeve and the rotating drum.

[0025] Furthermore, the adjustment component includes a first motor, a driving frame, a turntable, a first screw and a mounting frame. The mounting frame is arranged on the upper surface of the bracket, and a first motor is provided in the middle of the upper surface of the mounting frame. A first screw is provided at the lower end of the output shaft of the first motor, and the first screw is threadedly connected to the threaded tube in the middle of the driving frame. The driving frame is internally rotatably connected with a turntable, and the upper ends of the round rods are fixedly connected to the turntable. The input end of the first motor is electrically connected to the output end of the controller to provide driving force for the vertical movement of the round rod.

[0026] Furthermore, dovetail bars are symmetrically arranged on the left and right inner walls of the mounting frame, and dovetail grooves slidably connected to the dovetail bars are symmetrically arranged on the left and right ends of the driving frame, thereby playing a sliding guide role for the movement of the driving frame.

[0027] Furthermore, the right end of the upper surface of the bracket is rotatably connected to an electric push rod, the telescopic end of the electric push rod is rotatably connected to the U-shaped seat at the front end of the outer side of the barrel, and the input end of the electric push rod is electrically connected to the output end of the controller, which can drive the barrel to rotate reciprocatingly.

[0028] Furthermore, the inner lower end of the inner cylinder is rotatably connected to a limiting ring, and the lower end of the inner wall of the limiting ring is conical, which facilitates the concentric fixation of the crucible mold and the furnace lining.

[0029] In order to make the furnace lining have a longer service life, further, after each bag of furnace lining is used, 40-70 kg of return material is added to cool it down, and it can be used again after the temperature drops to 1650-1700℃ to reduce the extra loss of refractory materials. The inner wall of the furnace lining should be checked before use. If there are cracks, it should be repaired with repair material before use.

[0030] The beneficial effects of the present invention are:

[0031] In the process of making the furnace bottom, each time the refractory material is added, it is degassed and compacted with tools, which can discharge the gas in the charge and make the charge denser. By selecting the charge as a neutral refractory material, on the one hand, the performance can meet the melting temperature requirements of heat-resistant steel and iron, and the cost is relatively low, so as to achieve a relative balance between performance and cost;

[0032] Using a flat plate furnace vibrator to vibrate the furnace bottom material layer in the order of large, medium and small pressures can make the furnace bottom material layer more compact. At the same time, gradually reducing the pressure can also prevent the same vibration pressure from destroying the stability of the furnace bottom material layer. Pulling out the flat plate furnace vibrator during vibration can avoid the problem of the surface layer being not compacted due to the furnace vibrator sucking out the furnace charge on the surface of the furnace bottom material layer;

[0033] The present invention adds materials 10-15 times to make the furnace charge wall layer, and uses a tool fork to degas each time the materials are added, so that the furnace charge wall layer can be more compact;

[0034] The present invention adopts a two-hammer furnace wall vibration device to vibrate the furnace wall, and adds materials while vibrating. When the furnace wall material layer sinks, refractory materials are added immediately, so that the newly added refractory materials can also have sufficient vibration time. If the addition is not timely, it is easy to cause insufficient vibration time, thereby affecting the density of the furnace wall material layer.

[0035] Compared with the traditional method, the furnace lining prepared by the present invention significantly increases the service life of the furnace lining and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The present invention is a flow chart of the furnace building method;

[0037] Figure 2 It is a schematic diagram of the structure of the present invention;

[0038] Figure 3 It is a schematic diagram of the internal cross-sectional structure of the present invention;

[0039] Figure 4 It is a schematic diagram of the internal cross-sectional structure of the barrel of the present invention;

[0040] Figure 5 It is a schematic diagram of the internal structure of the barrel of the present invention;

[0041] Figure 6 A statistical table of furnace lining life before implementing the present invention;

[0042] Figure 7 This is a statistical table of furnace lining life after the implementation of the present invention. DETAILED DESCRIPTION

[0043] 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.

[0044] like Figure 1 As shown, the present invention provides a furnace building method for improving the service life of the furnace lining, which comprises the following steps:

[0045] S1. Install a ground wire at the bottom of the furnace. The ground wire is made of 3mm diameter stainless steel wire. The ground wire can prevent the suspended voltage on the molten steel from being too high, thus threatening the life safety of the boiler operator.

[0046] S2. Lay mica paper on the bottom and inner side of the furnace wall. Lay a layer of mica paper evenly along the bottom and inner side of the furnace wall to play an insulating role.

[0047] S3, adding neutral refractory materials into the furnace bottom three times to obtain a furnace bottom material layer, and after each addition, degassing and tamping with tools to make the furnace bottom material layer dense and compact;

[0048] In this step, the neutral refractory material is selected to be added because the high temperature resistance of the neutral refractory material is 1700-1780°C, which meets the melting temperature of heat-resistant steel; the neutral refractory material is made of fused corundum, high-purity magnesia, and high-purity spinel as main materials, and composite additives as auxiliary materials, wherein the composite additives are sintering agents. The neutral refractory material is selected to have a low cost and fully meet the requirements of the melting temperature, so that the performance and cost can be relatively balanced;

[0049] S4. Use a flat plate furnace vibrator that matches the inner diameter of the furnace wall to shake the furnace bottom material layer in accordance with the maximum (6Kg / cm 2 ), medium (4Kg / cm 2 ), small (1.5Kg / cm 2 ) The three pressure parameters are vibrated for 20 minutes, 10 minutes, and 10 minutes respectively. After the vibration is completed, the flat plate furnace vibrator is pulled out during the vibration. If the furnace vibrator is turned off and then pulled out, the furnace vibrator will suck out the furnace charge on the surface of the furnace bottom, resulting in a loose surface layer;

[0050] S5. Place the crucible mold at the center of the furnace bottom, add refractory materials into the gap between the outer wall of the crucible mold and the furnace wall by using auxiliary furnace building tools in 15 times to finally form a charge wall layer. The thickness of the charge wall layer is one third of the thickness of the charge bottom layer. Use the auxiliary furnace building tools to compact the charge after each addition. If too much material is added at a time, the charge wall layer formed at a time will be too thick, which will affect the compaction effect of the tool and thus affect the density of the charge wall layer.

[0051] S6. Place the two-hammer furnace wall vibration device into the bottom of the crucible mold furnace and set the vibration pressure to 6Kg / cm 2 , from bottom to top, every 8 minutes of vibration, lift the vibration equipment upward by 100cm. When the surface of the furnace wall material layer sinks during vibration, immediately add refractory materials. When the vibration equipment rises to 300mm from the top of the crucible mold, adjust the vibration pressure to 1.5Kg / cm 2 ,, to prevent the top surface of the furnace wall material layer from loosening, the vibration equipment is turned off and taken out after vibrating for 8 minutes. This step realizes secondary vibration of the furnace wall material layer, so that the furnace wall material layer is denser. At the same time, the vibration pressure is weakened when it is 300mm away from the top of the crucible mold, avoiding the defect of the top surface of the furnace wall material layer loosening due to secondary vibration;

[0052] S7. Sinter the furnace lining made by the ascending method and it can be used.

[0053] Specifically, the auxiliary furnace building tools in S5 are as follows: Figure 2-5As shown, it includes a barrel 1, a feeding assembly 2 and an adjusting assembly 3;

[0054] Barrel 1: Its outer side surface is rotatably connected with the inner wall of the circular groove arranged in the middle of the bracket 4. A cover plate 5 is provided at the upper opening of the barrel 1. A hopper 51 is provided at the feeding port arranged at the edge of the cover plate 5, which is convenient for feeding into the barrel 1. An inner barrel 6 is provided in the mounting port at the center of the cover plate 5. The inner barrel 6 is coaxially arranged with the barrel 1. The lower end of the inner part of the inner barrel 6 is rotatably connected with a limiting ring 61. The lower end of the inner wall of the limiting ring 61 is conically arranged. When building the furnace, the crucible mold is first placed inside the furnace lining, and then the bracket 4 is placed at the edge of the furnace lining, so that the lower end of the barrel 1 is inserted into the interior of the furnace lining, and at the same time, the upper end of the crucible mold is in contact with the inner wall of the limiting ring 61 inside the inner barrel 6. Since the lower end of the inner wall of the limiting ring 61 is conically arranged, it can play a positioning role for the crucible mold, so that the crucible mold and the furnace lining are concentrically fixed;

[0055] The material discharging assembly 2 is provided with a sliding hole corresponding to the middle part of the cover plate 5, and the lower end of the material discharging assembly 2 is located at the gap between the barrel 1 and the inner barrel 6. The material discharging assembly 2 comprises a sliding sleeve 21 and an annular sealing plug 22. The sliding sleeves 21 are provided in the through openings evenly arranged in the middle part of the annular sealing plug 22. The annular sealing plug 22 is located at the gap between the barrel 1 and the inner barrel 6. The sliding sleeves 21 are respectively slidably connected with the sliding holes corresponding to the middle part of the cover plate 5. The upper ends of the sliding sleeves 21 are fixedly connected with the connecting frame 17. A third motor 15 is provided in the middle part of the upper surface of the cover plate 5. A second screw rod 16 is provided at the upper end of the output shaft of the third motor 15. The second screw rod 16 is threadedly connected with the screw hole in the middle part of the connecting frame 17. A rotating sleeve 8 is rotatably connected to the outer side surface of the inner barrel 6. A rotating cylinder 9 is rotatably connected to the inner wall of the barrel 1. Paddles 10 are evenly spaced at the lower ends of the rotating sleeve 8 and the rotating cylinder 9. A second motor 11 is provided at the edge of the upper surface of the cover plate 5. The output shaft of the second motor 11 passes through the edge of the cover plate 5. The avoidance opening at the lower end is provided with a driving gear 12, the upper end of the rotating sleeve 8 is provided with a linkage gear 13 meshing with the driving gear 12, and the upper end of the inner wall of the rotating drum 9 is provided with a gear ring 14 meshing with the driving gear 12. The third motor 15 works to drive the sliding sleeve 21 to move up through the second screw rod 16 and the connecting frame 17, and then the annular sealing plug 22 moves up. At this time, the furnace charge inside the barrel 1 passes through the gap between the barrel 1 and the inner barrel 6 and is evenly scattered to the gap between the crucible mold and the furnace lining. At the same time, the second motor 11 works to drive the linkage gear 13 and the gear ring 14 to rotate in the opposite direction through the driving gear 12, so that the rotating sleeve 8 and the rotating drum 9 rotate in the opposite direction. The paddle 10 rotates with the rotating sleeve 8 and the rotating drum 9 to stir and stir the furnace charge, so that the furnace charge is discharged more evenly. After spreading a layer of furnace charge, the third motor 15 works to make the second screw rod 16 rotate in the opposite direction, and then drives the sliding sleeve 21 to move down through the connecting frame 17, so that the annular sealing plug 22 seals the gap between the barrel 1 and the inner barrel 6;

[0056] Adjustment component 3: arranged on the upper surface of the bracket 4, the middle part of the adjustment component 3 is evenly provided with round rods 7, the lower ends of the round rods 7 are slidably connected with the blanking component 2, the lower ends of the round rods 7 are respectively slidably connected with the vertically corresponding sliding sleeves 21, the lower ends of the round rods 7 are provided with vibration rods 71, the input end of the vibration rod 71 is electrically connected to the output end of the controller 19, the adjustment component 3 includes a first motor 31, a drive frame 32, a turntable 33, a first screw rod 35 and a mounting frame 36, the mounting frame 36 is arranged on the upper surface of the bracket 4, the middle part of the upper surface of the mounting frame 36 is provided with a first motor 31, the lower end of the output shaft of the first motor 31 is provided with a first screw rod 35, the first screw rod 35 is threaded with the threaded barrel in the middle of the drive frame 32 The drive frame 32 is connected with a turntable 33 for internal rotation, and the upper ends of the round rods 7 are fixedly connected with the turntable 33. The left and right inner walls of the mounting frame 36 are symmetrically provided with dovetail bars 34, and the left and right ends of the drive frame 32 are symmetrically provided with dovetail grooves slidably connected with the dovetail bars 34. The first motor 31 drives the first screw rod 35 to rotate. Under the guidance of the dovetail bar 34, the drive frame 32 which is rotatably threaded with the first screw rod 35 moves downward, and then the turntable 33 rotatably connected to the drive frame 32 drives the round rod 7 to move downward along the sliding sleeve 21 until the vibrating rod 71 at the lower end of the round rod 7 is inserted into the interior of the charge, and the controller 19 sends a start signal to make the vibrating rod 71 vibrate to automatically vibrate the charge.

[0057] Among them: a controller 19 is provided on the right side of the bracket 4, the input end of the controller 19 is electrically connected to an external power supply, and the input ends of the first motor 31, the second motor 11 and the third motor 15 are all electrically connected to the output end of the controller 19 to ensure the normal operation of the circuit.

[0058] As a supplementary embodiment of the present invention, the right end of the upper surface of the bracket 4 is rotatably connected to an electric push rod 18, the telescopic end of the electric push rod 18 is rotatably connected to the U-shaped seat at the front end of the outer side of the barrel 1, and the input end of the electric push rod 18 is electrically connected to the output end of the controller 19. The operation of the electric push rod 18 can drive the barrel 1 to reciprocate, so that the scattering and vibration of the charge are more uniform.

[0059] The working principle of the auxiliary furnace building tool is as follows: when building a furnace, first place the crucible mold inside the furnace lining, then place the bracket 4 at the edge of the furnace lining, insert the lower end of the barrel 1 into the interior of the furnace lining, and at the same time make the upper end of the crucible mold contact the inner wall of the limiting ring 61 inside the inner barrel 6. Since the lower end of the inner wall of the limiting ring 61 is conical, it can position the crucible mold, so that the crucible mold and the furnace lining are fixed concentrically, and then the charge is put into the interior of the barrel 1 through the hopper 51, and then the controller 19 controls the third motor 15 to work, and through the second The screw rod 16 and the connecting frame 17 drive the sliding sleeve 21 to move upward, thereby causing the annular sealing plug 22 to move upward. At this time, the furnace charge inside the barrel 1 is evenly scattered to the gap between the crucible mold and the furnace lining through the gap between the barrel 1 and the inner barrel 6. At the same time, the controller 19 controls the second motor 11 to work, and drives the linkage gear 13 and the gear ring 14 to rotate in the opposite direction through the driving gear 12, thereby causing the rotating sleeve 8 and the rotating drum 9 to rotate in the opposite direction. The paddle 10 rotates with the rotating sleeve 8 and the rotating drum 9 to stir and stir the furnace charge, so that the furnace charge is discharged more evenly. While spreading the charge, the controller 19 controls the electric The push rod 18 drives the barrel 1 to reciprocate, which can further improve the uniformity of the charge spreading. After spreading a layer of charge, the third motor 15 works to make the second screw rod 16 rotate in the opposite direction, and then drives the sliding sleeve 21 to move downward through the connecting frame 17, so that the annular sealing plug 22 seals the gap between the barrel 1 and the inner barrel 6. Then, the controller 19 controls the first motor 31 to drive the first screw rod 35 to rotate. Under the guidance of the dovetail bar 34, the driving frame 32 connected to the first screw rod 35 with a rotation thread moves downward, and then drives the driving frame 32 to seal the gap between the barrel 1 and the inner barrel 6. The internally rotating turntable 33 drives the round rod 7 to move downward along the sliding sleeve 21 until the vibrating rod 71 at the lower end of the round rod 7 is inserted into the interior of the charge, and the controller 19 sends a start signal to make the vibrating rod 71 vibrate to automatically vibrate the charge. After the vibration is completed, the first motor 31 works to move the round rod 7 upward, and then the electric push rod 18 drives the barrel 1 to rotate a certain angle, the round rod 7 moves downward again, and the vibrating rod 71 vibrates different positions of the charge again to make the charge filling more tightly, and the above steps are repeated until the gap between the crucible mold and the furnace lining is filled with charge.

[0060] Experimental example

[0061] In order to illustrate the superiority of the furnace lining life prepared by this process, our company specially arranged personnel to track the furnace lining life before improvement and after improvement from September 23, 2022 to October 28, 2022 and from October 31, 2022 to December 5, 2022, respectively. The life of the furnace lining before improvement is shown in the attached Figure 6 , the improved lining life is shown in the attached Figure 7 .

[0062] Figure 6 , Figure 7The life of a three-ton furnace means the number of times a furnace lining with a capacity of 3 tons is used, which is recorded randomly, and the average life is the average number of times the linings of 100 furnaces are used on that day.

[0063] Depend on Figure 6 , Figure 7 The data show that the average life of the furnace lining in the 17 days after the improvement was 75.28 times / furnace; the average life of the furnace lining in the 17 days before the improvement was 67.77 times / furnace, an increase of 11.08%.

[0064] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A furnace construction method for increasing the service life of a furnace lining, characterized in that: It includes the following steps: S1. Install the ground wire at the bottom of the furnace. The ground wire is made of stainless steel wire; S2. Lay mica paper on the bottom and inner side of the furnace wall; S3, adding refractory materials into the furnace bottom three times to obtain a furnace bottom material layer, and using tools to degas and compact each time; S4. Use a flat plate furnace vibrator that matches the inner diameter of the furnace wall to shake the furnace bottom material layer at 6Kg / cm 2 , 4Kg / cm 2 , 1.5Kg / cm 2 The three pressure parameters of large, medium and small are vibrated for 20 minutes, 10 minutes and 10 minutes respectively. After the vibration is completed, the flat plate vibrator is pulled out during the vibration; S5, placing the crucible mold at the center of the furnace bottom, adding refractory materials into the gap formed by the outer wall of the crucible mold and the furnace wall by auxiliary furnace building tools in 10-15 times to finally form a furnace charge wall layer, and vibrating with the auxiliary furnace building tools after each addition; S6. Place the two-hammer furnace wall vibration device into the bottom of the crucible mold furnace and set the vibration pressure to 6Kg / cm 2 , from bottom to top, lift the vibration equipment upward once every 8-10 minutes, the lifting distance is the vibration distance of the vibration equipment, when the wall layer of the furnace charge sinks during the vibration, add refractory materials at any time, when the wall layer of the furnace charge does not sink, no need to add materials, when the vibration equipment rises to 200-400mm from the top of the crucible mold, adjust the vibration pressure to 1-1.5Kg / cm 2 , Do not vibrate too much towards the top to prevent the top furnace wall material layer from loosening. After vibrating for 8-10 minutes, turn off the vibration equipment and take it out; S7, sintering the furnace lining obtained by the ascending method, and then using it; Wherein, in step S5, the auxiliary furnace building tool comprises: a barrel (1), a material discharge component (2) and an adjustment component (3); The barrel (1) has an outer side surface rotatably connected to the inner wall of a circular groove arranged in the middle of the bracket (4); a cover plate (5) is provided at the upper opening of the barrel (1); a hopper (51) is provided at the feeding port arranged at the edge of the cover plate (5); an inner barrel (6) is provided in the mounting port at the center of the cover plate (5); the inner barrel (6) is coaxially arranged with the barrel (1); the inner lower end of the inner barrel (6) is rotatably connected to a limiting ring (61); the lower end of the inner wall of the limiting ring (61) is arranged in a conical shape; A material discharge assembly (2): comprising a sliding sleeve (21) and an annular sealing plug (22), the upper end of which is slidably connected to a sliding hole correspondingly arranged in the middle of the cover plate (5), and the lower end of the material discharge assembly (2) is located in the gap between the barrel (1) and the inner barrel (6); The adjusting component (3) comprises a first motor (31), a driving frame (32), a rotating disk (33), a first screw rod (35) and a mounting frame (36), which is arranged on the upper surface of the bracket (4). Round rods (7) are evenly arranged in the middle of the adjusting component (3). The lower ends of the round rods (7) are slidably connected to the blanking component (2). The lower ends of the round rods (7) are arranged with vibrating rods (71). The input end of the vibrating rods (71) is electrically connected to the output end of the controller. The right side surface of the bracket (4) is provided with a controller (19). The input end of the controller (19) is electrically connected to an external power supply.

2. A furnace building method for increasing the service life of a furnace lining according to claim 1, characterized in that: In step S3, the added refractory material is a neutral refractory material, and the high temperature resistance of the neutral refractory material is 1700-1780°C, which meets the melting temperature of heat-resistant steel.

3. A furnace building method for increasing the service life of furnace lining according to claim 1, characterized in that: In step S5, the gap between the outer wall of the crucible mold and the inner wall of the furnace lining is one third of the furnace bottom material layer, and the furnace wall material layer is added in 15 times, and the material body is vibrated and compacted each time.

4. A furnace building method for increasing the service life of a furnace lining according to claim 1, characterized in that: In step S6, the vibration pressure of the second hammer furnace wall vibration device is set to 6Kg / cm 2 , every 8 minutes of vibration, lift the vibration device upwards by 100-120cm, when the vibration device is lifted to 300mm from the top of the crucible mold, reduce the vibration pressure to 1.5Kg / cm 2 , to prevent the upper furnace wall material layer from loosening, vibrate here for 8 minutes, then turn off the vibration equipment and take it out.

5. A furnace building method for increasing the service life of a furnace lining according to claim 1, characterized in that: Slide sleeves (21) are arranged in the through openings evenly arranged in the middle of the annular sealing plug (22). The annular sealing plug (22) is located at the gap between the barrel (1) and the inner barrel (6). The slide sleeves (21) are slidably connected to the corresponding slide holes arranged in the middle of the cover plate (5). The lower ends of the round rods (7) are slidably connected to the vertically corresponding slide sleeves (21). The upper ends of the slide sleeves (21) are fixedly connected to the connecting frame (17). A third motor (15) is arranged in the middle of the upper surface of the cover plate (5). A second screw rod (16) is arranged at the upper end of the output shaft of the third motor (15). The second screw rod (16) is threadedly connected to the screw hole in the middle of the connecting frame (17). The input end of the third motor (15) is electrically connected to the output end of the controller (19).

6. A furnace building method for increasing the service life of a furnace lining according to claim 5, characterized in that: The outer side surface of the inner cylinder (6) is rotatably connected to a rotating sleeve (8), the inner wall of the material cylinder (1) is rotatably connected to a rotating cylinder (9), and paddles (10) are evenly spaced at the lower ends of the rotating sleeve (8) and the rotating cylinder (9).

7. A furnace building method for increasing the service life of a furnace lining according to claim 6, characterized in that: A second motor (11) is provided at the edge of the upper surface of the cover plate (5); an output shaft of the second motor (11) passes through a clearance opening at the edge of the cover plate (5) and is provided with a driving gear (12) at the lower end; a linkage gear (13) meshing with the driving gear (12) is provided at the upper end of the rotating sleeve (8); a gear ring (14) meshing with the driving gear (12) is provided at the upper end of the inner wall of the rotating drum (9); and an input end of the second motor (11) is electrically connected to an output end of a controller (19).

8. A furnace building method for increasing the service life of a furnace lining according to claim 1, characterized in that: The mounting frame (36) is arranged on the upper surface of the bracket (4); a first motor (31) is arranged in the middle of the upper surface of the mounting frame (36); a first screw rod (35) is arranged at the lower end of the output shaft of the first motor (31); the first screw rod (35) is threadedly connected to a threaded tube in the middle of the driving frame (32); a turntable (33) is rotatably connected inside the driving frame (32); the upper ends of the round rods (7) are fixedly connected to the turntable (33); an input end of the first motor (31) is electrically connected to an output end of the controller (19); dovetail bars (34) are symmetrically arranged on the left and right inner walls of the mounting frame (36); and dovetail grooves slidably connected to the dovetail bars (34) are symmetrically arranged at the left and right ends of the driving frame (32).

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