Process for smelting stainless steel by kanthal electric furnace return method

Abstract

The application provides a kind of Consteel electric furnace return method smelting stainless steel process, belongs to steel smelting technical field, it solves the technical problem that the chemical composition of material in smelting process cannot be stabilized, so that the strength of material forming is poor.The Consteel electric furnace return method smelting stainless steel process comprises the following steps: S1, stable reduction: after a large amount of slag is discharged from the previous furnace raw material molten steel, multiple batches of ferrosilicon and silicon-manganese alloy are added, and reduction is fully carried out to ensure the reducing property of the Consteel furnace;S2, charging and melting period: at the beginning of smelting, low gear power supply is used to heat the Consteel electric furnace, and then carbon powder is sprayed to react with oxygen to generate CO gas, so that the molten slag forms a stable foam layer.The application has the advantages of realizing arc submerged arc combustion, reducing power consumption by 15%-20%, reducing electrode loss, and improving thermal efficiency, and cooperating with the Consteel electric furnace return method smelting stainless steel process, greatly reducing the cost and stabilizing the chemical composition.

Description

Technical Field

[0001] This invention belongs to the field of iron and steel smelting technology, and relates to a stainless steel smelting process, particularly a Konstantin electric furnace return process for smelting stainless steel. Background Technology

[0002] The advantages of the Consteel electric arc furnace (EAF) steelmaking process include continuous feeding, constant temperature and carbon characteristics of the molten steel throughout the process, and the use of scrap steel as the raw material. The traditional oxidation method suffers from severe alloy oxidation loss in the recycled material, especially chromium, resulting in viscous slag that makes the electric arc furnace unusable, necessitating the use of a scrap steel + alloy smelting method. To reduce the cost of raw materials for stainless steel smelting, the Consteel EAF uses recycled stainless steel material to smelt stainless steel instead of the oxidation method (scrap steel + alloy).

[0003] A search revealed a Chinese patent document disclosing a method for smelting steel using slag in a Consteel electric furnace [Application No.: 202011526041.6; Publication No.: CN 112760449 B]. This document describes a method for smelting steel using slag in a Consteel electric furnace. The furnace charge is entirely slag steel, and the specific steps are as follows: 1) Preparation of steel charge, G1 = (1.4~1.5)G; 2) Calculate based on the remaining G3 tons in the furnace after the previous furnace tapping, G3 = (1 / 3~1 / 2)G; feed 7~10 tons of charge during power outage, with a feeding time of 3~5 minutes; 3) When the total weight in the furnace reaches 2 / 3 of G2 tons, control the amount of charge fed during power outage at 10~12 tons, with a feeding time of 5~7 minutes, and stop feeding and power supply for smelting for 8~10 minutes; 4) When the total weight in the furnace reaches 3 / 4 of G2 tons, control the amount of charge fed during power outage at 12~18 tons, with a feeding time of 7~10 minutes; 5) After the total weight in the furnace reaches G2 tons, stop feeding, raise the temperature and tap the steel. This invention shortens the steelmaking cycle, reduces electrode breakage, decreases electrode consumption, reduces electricity consumption, and saves on smelting costs.

[0004] Although this patent shortens the steel smelting cycle, reduces electrode breakage, decreases electrode consumption, lowers electricity consumption, and saves smelting costs, it cannot stabilize the chemical composition of the material during the smelting process, resulting in poor strength of the material after molding. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a process for smelting stainless steel using the Consteel electric furnace return method. The technical problem this invention aims to solve is: how to achieve submerged arc combustion, reduce energy consumption by 15%-20%, reduce electrode loss, and improve thermal efficiency. Furthermore, in conjunction with the implementation of the Consteel electric furnace return method for smelting stainless steel, it significantly reduces costs and stabilizes the chemical composition.

[0006] The objective of this invention can be achieved through the following technical solutions: A process for smelting stainless steel using a Consteel electric furnace recycle method includes the following steps: S1. Stable reduceability: After a large amount of slag is discharged from the previous furnace of raw steel, ferrosilicon and ferromanganese alloy are added in multiple batches to fully reduce the steel and ensure the reduceability of the Kangsi furnace. S2. Charging and melting period: At the beginning of smelting, a low power supply is used to heat up the Kangsi electric furnace. Then, CO gas is generated by the reaction of injected carbon powder with oxygen, which makes the slag form a stable foam layer and realizes electric arc submerged combustion. After burning for 4 to 6 minutes, scrap steel is added. S3. Smelting period: In the smelting of the Conste electric furnace, a large amount of slag is used for multiple slag flows. After the slag flows, bottom lime and return material are added. S4, LF refining process: In the LF refining process, deoxidizers are added for pre-deoxidation, desulfurization, and adjustment of composition to meet VOD requirements; S5, VOD refining process: Before entering the VOD, remove some slag. When the vacuum degree reaches the specified 10-25KPa, start blowing oxygen and continue to evacuate the vacuum. When the temperature in the vacuum chamber rises and the vacuum degree drops significantly, stop blowing oxygen and continue to evacuate the vacuum. After the vacuum degree reaches the vacuum holding pressure value and is maintained for 10-30 minutes, break the vacuum.

[0007] The recycled material in step S3 has a carbon content of ≥0.4%, a silicon content of ≥0.1%, and a chromium content of ≥10%.

[0008] In step S3, when the molten steel temperature is greater than 1620℃, oxygen blowing to reduce carbon is started. During the oxygen blowing process, an appropriate amount of lime is added to adjust the slag.

[0009] In step S3, the tapping temperature of the electric furnace is greater than 1670℃.

[0010] The Kangsteel electric furnace used in steps S1-S5 is a Kangsteel electric furnace return process stainless steel smelting device, including a support frame, an electric furnace body fixed on the support frame, a feeding rack on one side of the electric furnace body, a conveyor belt fixed on the feeding rack, a limit plate fixed on the surface of the conveyor belt, a furnace opening on the electric furnace body, one end of the conveyor belt located inside the furnace opening, a discharge port on the bottom of the electric furnace body, a material distribution component on the discharge port, a material adding component on the electric furnace body, a conveying slide rail at the bottom of the support frame, and a receiving component slidably mounted on the conveying slide rail.

[0011] With the above structure, scrap steel and other materials can be conveyed into the electric furnace body via a conveyor belt. The electric furnace body heats the scrap steel to smelt it. After the smelting process, the material adding component adds reactive materials into the electric furnace body to achieve normal smelting work. After smelting, the molten steel and slag can be separated by the material separating component to improve the overall smelting effect and efficiency. Then, the separated molten steel and slag are transported by the receiving component to improve the overall operation effect and efficiency.

[0012] The material distribution assembly includes a material distribution block set inside the discharge port, a stabilizing column fixed at the bottom of the material distribution block, the stabilizing column slidingly engaging with the discharge port, and multiple flow holes opened on the stabilizing column. The bottom of the material distribution block is semi-elliptical. A mounting base is fixed on the top of the electric furnace body, and an operating rod is rotatably connected to the mounting base. One end of the operating rod is bent, and a movable groove is opened on the bent end of the operating rod. A movable seat is slidably connected in the movable groove, and an adjusting rod is fixed on the movable seat. The bottom end of the adjusting rod is fixedly connected to the material distribution block.

[0013] With the above structure, the movable seat can be raised or lowered by the control rod. When the movable seat is raised, it further raises the material distribution block through the control rod. After the material distribution block is raised, a gap is created between it and the discharge port. The molten steel flows out normally through the gap, but the slag is blocked. When all the molten steel has flowed out, the material distribution block can be raised completely, so that the discharge port is fully exposed. At this time, the slag can be cleaned, improving the overall smelting efficiency.

[0014] The material adding assembly includes an adding frame fixed to the electric furnace body and an adding cavity opened inside the adding frame. A feeding port is fixed to the adding frame, and a discharge screw is rotatably connected to the bottom of the adding cavity. The bottom of the adding cavity communicates with the interior of the electric furnace body. A servo motor is fixed to the adding frame, and the output shaft of the servo motor is coaxially fixedly connected to the discharge screw. With the above structure, materials can be pre-loaded into the feeding rack through the feeding interface. When materials need to be added, the servo motor drives the discharge screw to continuously inject materials into the electric furnace body, thus achieving normal feeding operation.

[0015] The receiving assembly includes a movable frame slidably connected to a conveyor rail, a receiving box mounted on the movable frame, a pair of guide cylinders slidably connected inside the movable frame, with the receiving box fixedly connected to the top of each guide cylinder, and a pair of adjusting screws rotatably connected inside the movable frame, each adjusting screw being threadedly connected to a corresponding guide cylinder. A pair of adjusting gears are rotatably connected inside the movable frame, and a drive gear is also rotatably connected inside the movable frame. The drive gear meshes with the two adjusting gears, and both adjusting gears are coaxially fixedly connected to their corresponding adjusting screws. A transmission gear one is coaxially fixedly connected to the gear. An operating frame is fixedly mounted on the moving frame. A drive worm and a drive worm wheel are rotatably connected inside the operating frame. An operating ring is provided on the operating frame. The operating ring and the operating worm are coaxially fixedly connected, and the operating worm meshes with the operating worm wheel. A transmission bevel gear one is coaxially fixedly connected to the operating worm wheel. A transmission bevel gear two is rotatably connected inside the operating frame. The transmission bevel gear one and the transmission bevel gear two mesh, and a transmission gear two is coaxially fixedly connected to the transmission bevel gear two. A transmission toothed belt connects the transmission gear two and the transmission gear one.

[0016] Using the above structure, the entire moving frame can be moved by holding the operating ring, thus achieving normal conveying operation. Rotating the operating ring drives the drive worm gear, which in turn drives the drive worm wheel, which in turn drives the first transmission bevel gear. The first transmission bevel gear then drives the second transmission bevel gear, which in turn drives the second transmission bevel gear. The second transmission bevel gear, through a transmission belt, drives the first transmission gear, which in turn drives the drive gear. The drive gear then drives two adjusting gears, which in turn drive corresponding adjusting screws. These adjusting screws further move the corresponding guide cylinders, thereby controlling the height of the receiving box. This improves the receiving effect of the receiving box, prevents material splashing when receiving molten steel or slag, and enhances overall safety.

[0017] A heating coil is fixed inside the bottom of the electric furnace body, and an electromagnetic coil is also fixed inside the bottom of the electric furnace body.

[0018] Using the above structure, normal heating and smelting work is achieved through heating coils, and electromagnetic stirring function is achieved through electromagnetic coils.

[0019] Compared with existing technologies, the recycle process for stainless steel smelting using the Conside electric furnace has the following advantages: 1. After the material distribution block is raised, a gap is created between it and the discharge port. Molten steel flows out normally through the gap, but steel slag is blocked. When all the molten steel has flowed out, the material distribution block can be raised completely, so that the discharge port is fully exposed. At this time, the steel slag can be cleaned up, improving the overall smelting efficiency.

[0020] 2. The material is pre-loaded into the feeding rack through the feeding interface. When it is needed, the servo motor drives the discharge screw to continuously inject the material into the electric furnace body, thus achieving normal feeding.

[0021] 3. To control the height of the receiving box, thereby improving the receiving effect, preventing material splashing when receiving molten steel or slag, and improving the overall safety protection effect.

[0022] 4. By injecting carbon powder and reacting it with oxygen to generate CO gas, a stable foam layer is formed in the molten slag, achieving submerged arc combustion. This technology can reduce energy consumption by 15%-20%, reduce electrode wear, and improve thermal efficiency. Furthermore, when combined with the implementation of the Kangsi electric furnace return process for smelting stainless steel, it greatly reduces costs and stabilizes the chemical composition. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the process steps of the present invention.

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the material distribution component in the material distribution state of the present invention.

[0026] Figure 4 This is a schematic diagram of the closed state of the material distribution component in this invention.

[0027] Figure 5 This is a schematic diagram of the internal structure of the added frame in this invention.

[0028] Figure 6 This is a schematic diagram of the receiving component in this invention.

[0029] Figure 7 This is a schematic diagram of the internal structure of the operating frame in this invention.

[0030] In the diagram: 1. Elevating frame; 2. Electric furnace body; 3. Feeding rack; 4. Conveyor belt; 5. Limiting plate; 6. Furnace opening; 7. Discharge port; 8. Conveying slide rail; 9. Material distribution block; 10. Stabilizing column; 11. Flow hole; 12. Mounting base; 13. Operating lever; 14. Movable groove; 15. Movable seat; 16. Control lever; 17. Adding rack; 18. Adding cavity; 19. Feeding interface; 20. Discharge screw; 21. Servo motor; 22. Moving frame; 23. Receiving box; 24. Guide cylinder; 25. Control screw; 26. Control gear; 27. Drive gear; 28. Transmission gear one; 29. ​​Operating frame; 30. Drive worm; 31. Drive worm wheel; 32. Operating ring; 33. Transmission bevel gear one; 34. Transmission bevel gear two; 35. Transmission toothed belt; 36. Heating coil; 37. Electromagnetic coil; 38. Transmission gear two. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] like Figures 1-7 As shown, a process for smelting stainless steel using a Consteel electric furnace recycle method includes the following steps: S1. Stable reduceability: After a large amount of slag is discharged from the previous furnace of raw steel, ferrosilicon and ferromanganese alloy are added in multiple batches to fully reduce the steel and ensure the reduceability of the Kangsi furnace. S2. Charging and melting period: At the beginning of smelting, a low power supply is used to heat up the Kangsi electric furnace. Then, CO gas is generated by the reaction of injected carbon powder with oxygen, which makes the slag form a stable foam layer and realizes electric arc submerged combustion. After burning for 4 to 6 minutes, scrap steel is added. S3. Smelting period: In the smelting of the Conste electric furnace, a large amount of slag is used for multiple slag flows. After the slag flows, bottom lime and return material are added. S4, LF refining process: In the LF refining process, deoxidizers are added for pre-deoxidation, desulfurization, and adjustment of composition to meet VOD requirements; S5, VOD refining process: Before entering the VOD, remove some slag. When the vacuum degree reaches the specified 10-25KPa, start blowing oxygen and continue to evacuate the vacuum. When the temperature in the vacuum chamber rises and the vacuum degree drops significantly, stop blowing oxygen and continue to evacuate the vacuum. After the vacuum degree reaches the vacuum holding pressure value and is maintained for 10-30 minutes, break the vacuum.

[0033] The recycled material in step S3 has a carbon content of ≥0.4%, a silicon content of ≥0.1%, and a chromium content of ≥10%.

[0034] In step S3, when the molten steel temperature is above 1620℃, oxygen blowing begins to reduce carbon content. During the oxygen blowing process, an appropriate amount of lime is added to adjust the slag.

[0035] In step S3, the tapping temperature of the electric furnace is greater than 1670℃.

[0036] The Kangste electric furnace used in steps S1-S5 is a Kangste electric furnace return process stainless steel smelting device, including a support frame 1, an electric furnace body 2 fixed on the support frame 1, a feeding rack 3 on one side of the electric furnace body 2, a conveyor belt 4 fixed on the feeding rack 3, and a limiting protrusion 5 fixed on the surface of the conveyor belt 4. The electric furnace body 2 has a furnace opening 6, one end of the conveyor belt 4 is located inside the furnace opening 6, and a discharge port 7 is opened at the bottom of the electric furnace body 2. A material distribution component is provided on the discharge port 7, and a material adding component is provided on the electric furnace body 2. A conveying slide rail 8 is provided at the bottom of the support frame 1, and a receiving component is slidably arranged on the conveying slide rail 8.

[0037] With the above structure, scrap steel and other materials can be transported into the electric furnace body 2 via conveyor belt 4. The electric furnace body 2 heats the scrap steel to smelt it. After the smelting process, reaction materials are added into the electric furnace body 2 via the material adding component to achieve normal smelting. After smelting, the molten steel and slag can be separated by the material separating component to improve the overall smelting effect and efficiency. The separated molten steel and slag are then transported by the receiving component to improve the overall operation effect and efficiency.

[0038] The material distribution assembly includes a material distribution block 9 set inside the discharge port 7, a stabilizing column 10 fixed at the bottom of the material distribution block 9, the stabilizing column 10 slidingly engaging with the discharge port 7, and multiple flow holes 11 opened on the stabilizing column 10, and the bottom of the material distribution block 9 is semi-elliptical. A mounting base 12 is fixed at the top of the electric furnace body 2, and an operating rod 13 is rotatably connected to the mounting base 12. One end of the operating rod 13 is bent, and a movable groove 14 is opened on the bent end of the operating rod 13. A movable seat 15 is slidably connected in the movable groove 14, and an adjusting rod 16 is fixed on the movable seat 15. The bottom end of the adjusting rod 16 is fixedly connected to the material distribution block 9.

[0039] With the above structure, the movable seat 15 can be raised or lowered by the control rod 16. When the movable seat 15 is raised, it further raises the material distribution block 9 by the control rod 16. After the material distribution block 9 is raised, a gap is created between it and the discharge port 7. The molten steel flows out normally through the gap, but the slag is blocked. When all the molten steel has flowed out, the material distribution block 9 can be raised completely, so that the discharge port 7 is fully exposed. At this time, the slag can be cleaned, improving the overall smelting efficiency.

[0040] The material feeding assembly includes a feeding frame 17 fixed to the electric furnace body 2, a feeding cavity 18 inside the feeding frame 17, a feeding interface 19 fixed on the feeding frame 17, and a discharge screw 20 rotatably connected to the bottom of the feeding cavity 18. The bottom of the feeding cavity 18 communicates with the interior of the electric furnace body 2. A servo motor 21 is fixed on the feeding frame 17, and the output shaft of the servo motor 21 is coaxially fixedly connected to the discharge screw 20. Using the above structure, the added material can be pre-loaded into the adding rack 17 through the feeding interface 19. When it is necessary to add material, the servo motor 21 drives the discharge screw 20 to operate, so that the discharge screw 20 continuously injects the material into the electric furnace body 2, realizing normal feeding operation.

[0041] The receiving assembly includes a movable frame 22 slidably connected to a conveying slide rail 8, a receiving box 23 mounted on the movable frame 22, a pair of guide cylinders 24 slidably connected inside the movable frame 22, with the receiving box 23 fixedly connected to the top of each guide cylinder 24, and a pair of adjusting screws 25 rotatably connected inside the movable frame 22, each adjusting screw 25 being threadedly connected to a corresponding guide cylinder 24. A pair of adjusting gears 26 are rotatably connected inside the movable frame 22, and a drive gear 27 is rotatably connected inside the movable frame 22, meshing with the two adjusting gears 26. Both adjusting gears 26 are coaxially fixedly connected to their corresponding adjusting screws 25. A transmission gear 28 is coaxially fixedly connected to the 27. An operating frame 29 is fixedly fixed on the moving frame 22. A drive worm 30 and a drive worm wheel 31 are rotatably connected inside the operating frame 29. An operating ring 32 is provided on the operating frame 29. The operating ring 32 is coaxially fixedly connected to the operating worm, and the operating worm meshes with the operating worm wheel. A transmission bevel gear 33 is coaxially fixedly connected to the operating worm wheel. A transmission bevel gear 34 is rotatably connected inside the operating frame 29. The transmission bevel gear 33 meshes with the transmission bevel gear 34, and a transmission gear 38 is coaxially fixedly connected to the transmission bevel gear 34. A transmission toothed belt 35 connects the transmission gear 38 and the transmission gear 28.

[0042] With the above structure, the entire moving frame 22 can be moved by holding the operating ring 32 to achieve normal conveying operation. After rotating the operating ring 32, the operating ring 32 will drive the drive worm 30 to rotate, which in turn drives the drive worm wheel 31 to rotate. The drive worm wheel 31 will then drive the transmission bevel gear 33 to rotate, which in turn drives the transmission bevel gear 34 to rotate. The transmission bevel gear 34 will then drive the transmission gear 38 to rotate, which in turn drives the transmission gear 28 to rotate via the transmission belt 35. The transmission gear 28 will then drive the drive gear 27 to rotate, which in turn drives the two regulating gears 26 to rotate. The two regulating gears 26 will then drive the corresponding regulating screws 25 to rotate, which in turn drive the corresponding guide cylinders 24 to move. This controls the height of the receiving box 23, thereby improving the receiving effect of the receiving box 23, preventing material splashing when receiving molten steel or slag, and improving the overall safety protection effect.

[0043] A heating coil 36 is fixed inside the furnace bottom of the electric furnace body 2, and an electromagnetic coil 37 is fixed inside the furnace bottom of the electric furnace body 2.

[0044] With the above structure, normal heating and smelting work is achieved through heating coil 36, and electromagnetic stirring function is achieved through electromagnetic coil 37.

[0045] The working principle of this invention is as follows: Scrap steel and other materials are conveyed into the electric furnace body 2 via conveyor belt 4. The scrap steel is heated by heating coil 36 to smelt it. After smelting, the added materials are pre-loaded into the adding rack 17 through the feeding interface 19. When additional materials are needed, the servo motor 21 drives the discharge screw 20 to continuously inject materials into the electric furnace body 2, achieving normal feeding. Electromagnetic stirring is achieved through electromagnetic coil 37. After smelting is completed, the material is controlled by the regulating rod 1. 6. The movable seat 15 is raised or lowered. When the movable seat 15 is raised, it further raises the material distribution block 9 via the control rod 16. After the material distribution block 9 is raised, a gap is created between it and the discharge port 7. The molten steel flows out normally through the gap, but the slag is blocked. When all the molten steel has flowed out, the material distribution block 9 can be raised completely, so that the discharge port 7 is fully exposed. At this time, the slag can be cleaned, improving the overall smelting efficiency. The entire moving frame 22 is moved by holding the operating ring 32, thereby achieving the correct movement. During normal conveying operations, rotating the operating ring 32 causes the drive worm gear 30 to rotate, which in turn drives the drive worm wheel 31 to rotate. The drive worm wheel 31 then drives the transmission bevel gear 33 to rotate, which in turn drives the transmission bevel gear 34 to rotate. The transmission bevel gear 34 then drives the transmission gear 38 to rotate. The transmission gear 38, via the transmission belt 35, drives the transmission gear 28 to rotate. The transmission gear 28 then drives the drive gear 27 to rotate, which in turn drives the two regulating gears 26 to rotate. The two regulating gears 26 then drive the corresponding regulating screws 25 to rotate, which in turn move the corresponding guide cylinders 24. This controls the height of the receiving box 23, improving its receiving effect and preventing material splashing when receiving molten steel or slag, thus enhancing overall safety.

[0046] In summary, scrap steel and other materials are transported into the electric furnace body 2 via conveyor belt 4. The electric furnace body 2 heats the scrap steel to smelt it. After the smelting process, reaction materials are added into the electric furnace body 2 via the material adding component to achieve normal smelting operation. After smelting, the molten steel and slag can be separated by the material separating component to improve the overall smelting effect and efficiency. The separated molten steel and slag are then transported by the receiving component to improve the overall operation effect and efficiency.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A process for smelting stainless steel using a Consteel electric furnace return method, characterized in that, Includes the following steps: S1. Stable reduceability: After a large amount of slag is discharged from the previous furnace of raw steel, ferrosilicon and ferromanganese alloy are added in multiple batches to fully reduce the steel and ensure the reduceability of the Kangsi furnace. S2. Charging and melting period: At the beginning of smelting, a low power supply is used to heat up the Kangsi electric furnace. Then, CO gas is generated by the reaction of injected carbon powder with oxygen, which makes the slag form a stable foam layer and realizes electric arc submerged combustion. After burning for 4 to 6 minutes, scrap steel is added. S3. Smelting period: In the smelting of the Conste electric furnace, a large amount of slag is used for multiple slag flows. After the slag flows, bottom lime and return material are added. S4, LF refining process: In the LF refining process, deoxidizers are added for pre-deoxidation, desulfurization, and adjustment of composition to meet VOD requirements; S5, VOD refining process: Before entering the VOD, remove some slag. When the vacuum degree reaches the specified 10-25KPa, start blowing oxygen and continue to evacuate the vacuum. When the temperature in the vacuum chamber rises and the vacuum degree drops significantly, stop blowing oxygen and continue to evacuate the vacuum. After the vacuum degree reaches the vacuum holding pressure value and is maintained for 10-30 minutes, break the vacuum.

2. The process for smelting stainless steel using the recycle method in a Consteel electric furnace according to claim 1, characterized in that, The recycled material in step S3 has a carbon content of ≥0.4%, a silicon content of ≥0.1%, and a chromium content of ≥10%.

3. The process for smelting stainless steel using the recycle method in a Consteel electric furnace according to claim 1, characterized in that, In step S3, when the molten steel temperature is greater than 1620℃, oxygen blowing to reduce carbon is started. During the oxygen blowing process, an appropriate amount of lime is added to adjust the slag.

4. The process for smelting stainless steel using the recycle method in a Consteel electric furnace according to claim 1, characterized in that, In step S3, the tapping temperature of the electric furnace is greater than 1670℃.

5. The process for smelting stainless steel using the recycle method in a Consteel electric furnace according to claim 1, characterized in that, The Kangste electric furnace used in steps S1-S5 is a Kangste electric furnace return method stainless steel smelting device, including a support frame (1), an electric furnace body (2) fixed on the support frame (1), and a feeding rack (3) on one side of the electric furnace body (2). A conveyor belt (4) is fixed on the feeding rack (3), and a limiting protrusion (5) is fixed on the surface of the conveyor belt (4). A furnace opening (6) is opened on the electric furnace body (2), one end of the conveyor belt (4) is located inside the furnace opening (6), and a discharge port (7) is opened at the bottom of the electric furnace body (2). A material distribution component is set on the discharge port (7), and a material adding component is set on the electric furnace body (2). A conveying slide rail (8) is set at the bottom of the support frame (1), and a receiving component is slidably set on the conveying slide rail (8).

6. The process for smelting stainless steel using the recycle method in a Consteel electric furnace according to claim 5, characterized in that, The material distribution assembly includes a material distribution block (9) set in the discharge port (7), a stabilizing column (10) fixed at the bottom of the material distribution block (9), the stabilizing column (10) slidingly engaging with the discharge port (7), and multiple flow holes (11) opened on the stabilizing column (10), and the bottom of the material distribution block (9) is semi-elliptical. A mounting base (12) is fixed at the top of the electric furnace body (2), and an operating rod (13) is rotatably connected to the mounting base (12). One end of the operating rod (13) is bent, and a movable groove (14) is opened on the bent end of the operating rod (13). A movable seat (15) is slidably connected in the movable groove (14), and an adjusting rod (16) is fixed on the movable seat (15). The bottom end of the adjusting rod (16) is fixedly connected to the material distribution block (9).

7. The process for smelting stainless steel using the recycle method in a Consteel electric furnace according to claim 5, characterized in that, The material addition assembly includes an addition frame (17) fixed on the electric furnace body (2) and an addition cavity (18) opened inside the addition frame (17). The addition frame (17) is fixed with a feeding interface (19), and the bottom of the addition cavity (18) is rotatably connected to a discharge screw (20). The bottom of the addition cavity (18) is connected to the inside of the electric furnace body (2). A servo motor (21) is fixed on the addition frame (17), and the output shaft of the servo motor (21) is coaxially fixedly connected to the discharge screw (20).

8. The process for smelting stainless steel using the recycle method in a Consteel electric furnace according to claim 5, characterized in that, The receiving assembly includes a movable frame (22) slidably connected to a conveying slide rail (8), a receiving box (23) mounted on the movable frame (22), a pair of guide cylinders (24) slidably connected inside the movable frame (22), and the receiving box (23) fixedly connected to the top of each guide cylinder (24). A pair of adjusting screws (25) are rotatably connected inside the movable frame (22), each adjusting screw (25) being threadedly connected to a corresponding guide cylinder (24). A pair of adjusting gears (26) are rotatably connected inside the movable frame (22), and a drive gear (27) is rotatably connected inside the movable frame (22). The drive gear (27) meshes with the two adjusting gears (26), and both adjusting gears (26) are coaxially fixedly connected to their corresponding adjusting screws (25). A transmission gear (28) is coaxially fixedly connected to the gear (27). An operating frame (29) is fixedly connected to the moving frame (22). A drive worm (30) and a drive worm wheel (31) are rotatably connected inside the operating frame (29). An operating ring (32) is provided on the operating frame (29). The operating ring (32) is coaxially fixedly connected to the operating worm, and the operating worm meshes with the operating worm wheel. A transmission bevel gear (33) is coaxially fixedly connected to the operating worm wheel. A transmission bevel gear (34) is rotatably connected inside the operating frame (29). The transmission bevel gear (33) meshes with the transmission bevel gear (34), and a transmission gear (38) is coaxially fixedly connected to the transmission bevel gear (34). A transmission toothed belt (35) is connected between the transmission gear (38) and the transmission gear (28).

9. The process for smelting stainless steel using the recycle method in a Consteel electric furnace according to claim 5, characterized in that, A heating coil (36) is fixed inside the furnace bottom of the electric furnace body (2), and an electromagnetic coil (37) is fixed inside the furnace bottom of the electric furnace body (2).

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