Rapid nickel removal method for rotary anode furnace

Abstract

The invention relates to a method for rapid nickel removal, in particular to a method for rapid nickel removal of a rotary anode furnace, and belongs to the technical field of rotary anode furnace nickel removal. Earlier-stage preparation is conducted, specifically, heating is conducted according to a masonry brick heating curve, when the temperature reaches 1200 DEG C, the temperature is kept constant for 4 hours, then blow-in conditions are met, and a central controller is notified to make preparation; the public and auxiliary systems are informed to prepare linkage production through operations of feeding different types of materials into the furnace and adding hot materials (crude copper), reasonably adding quartz sand in the early stage and the middle stage of feeding according to the grade of the materials fed into the furnace, determining whether the materials enter an oxidation slagging period or not, entering a deslagging period, detecting copper samples to test copper and nickel contents, and entering a reduction period; according to the manufacturing method, the content of nickel in the rotary anode furnace can be rapidly reduced, then the working efficiency of workers is improved, the labor intensity of the workers is reduced, the time node of each process and the material input amount can be calculated according to the design capacity of the anode furnace, the proportion can be reasonably controlled, and the economic benefit is high.

Description

Technical Field

[0001] The invention relates to a method for rapid nickel removal, in particular to a method for rapid nickel removal from a rotary anode furnace, and belongs to the technical field of rotary anode furnace nickel removal. Background Art

[0002] A rotary anode furnace, also known as a rotary anode furnace or anode refining furnace, is a type of equipment widely used in the non-ferrous metal smelting industry. It is mainly used in the refining process of metals such as copper and nickel. Its working principle and structural design are designed to optimize the metal purification efficiency and ease of operation. The rotary anode furnace achieves uniform mixing and heating of the materials in the furnace through the rotation and tilting of the furnace body. The furnace body is usually designed to be a rotatable cylindrical or conical structure with a refractory material lined to withstand high temperatures. During the smelting process, the furnace is filled with metal raw materials to be refined, and the materials are heated by a high-temperature flame generated by burning fuel (such as heavy oil, natural gas or coal powder). As the furnace body rotates, the materials continue to roll in the furnace, allowing impurities to be separated and volatilized, thereby achieving metal refining.

[0003] However, when removing nickel from metal using the existing production method, the existing production method takes a long time to remove nickel, has low economic benefits, and has high labor intensity for workers using the existing production method, so there is room for improvement.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a method for rapid nickel removal in a rotary anode furnace in order to solve the above-mentioned problems, which has the effects of rapid reaction in a short time, rapid nickel removal and high economic benefit.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme, a method for rapid nickel removal of a rotary anode furnace, comprising the following steps:

[0007] S1: Preliminary preparation: Heat up according to the brick heating curve. When the temperature reaches 1200℃ and is kept constant for 4 hours, the furnace is ready for start-up. Notify the central control system to prepare and notify all public and auxiliary systems to prepare for joint production.

[0008] S2: Different types of materials are put into the furnace: waste anode copper, residual plates, waste copper molds and crude copper are added into the furnace, and the order of adding materials is the burner position, the tail of the furnace body, the burner position, and the middle of the furnace body. After the addition is completed, the natural gas flow rate and the pressure in the furnace are adjusted in time according to the temperature of the copper liquid in the furnace;

[0009] S3: Adding hot material (copper): confirm the time of copper discharge from converter, clear the redox pipe in advance, ensure the copper outlet is properly sealed, set the NGL furnace operation mode to charging mode on the DCS screen, the natural gas burner flow rate is 600Nm3 / h-800Nm3 / h, the redox air duct compressed air is 1500Nm3 / h, and the nitrogen stirring system is in the insulation state;

[0010] S4: Adding quartz sand: Add quartz sand reasonably in the early and middle stages of adding materials according to the grade of the materials entering the furnace;

[0011] S5: Confirm whether it has entered the oxidation slagging period: Check the valve group on the oxidation air pipeline, whether the oxidation compressed air metal hose and the connection are leaking, whether the pressure is around 0.65Mpa, confirm that the oxidation air flow is 2000Nm3 / h or open all the oxidation air pneumatic valves and confirm, check the manual valve on the stirring nitrogen pipeline, whether the stirring nitrogen hose and the connection are leaking, the pressure is 0.55MPa±10%, adjust the stirring nitrogen flow to the oxidation mode, confirm that the copper outlet has been completely blocked, and confirm whether there are personnel or parking equipment on the feeding platform, the chute behind the furnace and the platform;

[0012] S6: Entering the slag discharge period: notify the driving to lift the slag bag to the anode furnace slag discharge flatbed truck, adjust the negative pressure in the furnace and the combustion natural gas flow rate on the PLC control system, adjust the negative pressure in the furnace to -20~-50Pa (based on no smoke), stir nitrogen to the slag discharge mode, open the furnace cover, and then operate the furnace handle to tilt the furnace to the slag discharge position, then adjust the furnace to discharge the slag and discharge the slag in the furnace. After the refined slag is discharged, turn the furnace to a safe position and close the furnace cover;

[0013] S7: Detect copper and nickel content of copper sample: copper sample tested copper content is above 96.5%, nickel content is below 2%, blow air for one hour, add iron oxide powder with content above 80%, continue blow air for one hour, add quartz sand, repeat steps S5 and S6, copper sample tested copper content is below 96.5%, nickel content is above 2%, extend blow air time, increase iron oxide powder with content above 80%, according to actual steps S5 and S6;

[0014] S8: Entering the reduction period: Check the valve group on the reduction natural gas pipeline, whether the reduction natural gas metal hose and the connection are leaking, whether the natural gas pressure is around 0.6Mpa, open the valve on the reduction natural gas pipeline of the corresponding furnace and confirm, adjust the natural gas flow rate, control it within 650Nm3 / h, and adjust the negative pressure in the furnace to between 0 and -10Pa. After the reduction is completed, operate the furnace rocker handle to turn the furnace to a safe position in the front direction of the furnace, close the pneumatic regulating valve, and the anode furnace reduction is completed.

[0015] Furthermore, in step S2, the negative pressure in the furnace needs to be adjusted to -20 to -50P on the DCS control system.

[0016] Furthermore, in step S3, a 50-ton metallurgical crane is used to transfer the hot copper ladle from the converter to the anode furnace. During the charging period, no irrelevant personnel are allowed to appear in the charging channel, and the crane is under the command of a dedicated person during the charging period.

[0017] Furthermore, in step S5, the furnace body is transferred to the oxidation position (31 degrees) for oxidation operation.

[0018] Furthermore, in step S8, the natural gas pipeline must be purged before opening the natural gas, and the natural gas is introduced 3-5 seconds after the nitrogen flow reaches the set value. When the nitrogen and natural gas flows reach the set values, the furnace body is slowly rotated to the reduction position for reduction operation.

[0019] Furthermore, in step S8, the natural gas flow rate of the burner is adjusted to 150 Nm3 / h for combustion, and the temperature of the copper liquid is lower than 1230°C after the oxidation is completed, and the stirring nitrogen flow rate is adjusted to the reduction mode.

[0020] Furthermore, during the reduction in step S8, the secondary combustion chamber outlet temperature is controlled below 550°C, and the bag inlet temperature is controlled below 230°C.

[0021] Furthermore, the reduction end point of the copper sample in step S8 should be: a flat surface, fine and uniform patterns, rose red color, oily surface, and the temperature of the copper liquid at the end of reduction is about 1230±10°C.

[0022] The technical effects and advantages of the present invention are as follows: 1. The present production method can quickly reduce the nickel content in the rotary anode furnace, thereby improving the work efficiency of workers and reducing their labor intensity.

[0023] 2. This production method can calculate the time nodes of each process and the material input according to the design capacity of the anode furnace, can reasonably control the ratio, and has high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of the method for making the present invention;

[0025] Figure 2 This is a schematic diagram of the relationship between the natural gas burner flow and the nickel removal time of the present invention; DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-Figure 2 As shown, a method for rapid nickel removal of a rotary anode furnace comprises the following steps: S1: Preliminary preparation: heating up according to the heating curve of masonry bricks, when the temperature reaches 1200°C and then kept at a constant temperature for 4 hours, the furnace is ready for opening, the central control is notified to prepare, and each public auxiliary system is notified to prepare for linkage production;

[0028] S2: Different types of materials are put into the furnace: waste anode copper, residual plates, waste copper molds and crude copper are added into the furnace, and the order of adding materials is the burner position, the tail of the furnace body, the burner position, and the middle of the furnace body. After the addition is completed, the natural gas flow rate and the pressure in the furnace are adjusted in time according to the temperature of the copper liquid in the furnace;

[0029] S3: Adding hot material (copper): confirm the time of copper discharge from converter, clear the redox pipe in advance, ensure the copper outlet is properly sealed, set the NGL furnace operation mode to charging mode on the DCS screen, the natural gas burner flow rate is 600Nm3 / h-800Nm3 / h, the redox air duct compressed air is 1500Nm3 / h, and the nitrogen stirring system is in the insulation state;

[0030] S4: Adding quartz sand: Add quartz sand reasonably in the early and middle stages of adding materials according to the grade of the materials entering the furnace;

[0031] S5: Confirm whether it has entered the oxidation slagging period: Check the valve group on the oxidation air pipeline, whether the oxidation compressed air metal hose and the connection are leaking, whether the pressure is around 0.65Mpa, confirm that the oxidation air flow is 2000Nm3 / h or open all the oxidation air pneumatic valves and confirm, check the manual valve on the stirring nitrogen pipeline, whether the stirring nitrogen hose and the connection are leaking, the pressure is 0.55MPa±10%, adjust the stirring nitrogen flow to the oxidation mode, confirm that the copper outlet has been completely blocked, and confirm whether there are personnel or parking equipment on the feeding platform, the chute behind the furnace and the platform;

[0032] S6: Entering the slag discharge period: notify the driving to lift the slag bag to the anode furnace slag discharge flatbed truck, adjust the negative pressure in the furnace and the combustion natural gas flow rate on the PLC control system, adjust the negative pressure in the furnace to -20~-50Pa (based on no smoke), stir nitrogen to the slag discharge mode, open the furnace cover, and then operate the furnace handle to tilt the furnace to the slag discharge position, then adjust the furnace to discharge the slag and discharge the slag in the furnace. After the refined slag is discharged, turn the furnace to a safe position and close the furnace cover;

[0033] S7: Detect copper and nickel content of copper sample: copper sample tested copper content is above 96.5%, nickel content is below 2%, blow air for one hour, add iron oxide powder with content above 80%, continue blow air for one hour, add quartz sand, repeat steps S5 and S6, copper sample tested copper content is below 96.5%, nickel content is above 2%, extend blow air time, increase iron oxide powder with content above 80%, according to actual steps S5 and S6;

[0034] S8: Entering the reduction period: Check the valve group on the reduction natural gas pipeline, whether the reduction natural gas metal hose and the connection are leaking, whether the natural gas pressure is around 0.6Mpa, open the valve on the reduction natural gas pipeline of the corresponding furnace and confirm, adjust the natural gas flow rate, control it within 650Nm3 / h, and adjust the negative pressure in the furnace to between 0 and -10Pa. After the reduction is completed, operate the furnace rocker handle to turn the furnace to a safe position in the front direction of the furnace, close the pneumatic regulating valve, and the anode furnace reduction is completed.

[0035] like Figure 1 and Figure 2 As shown, in step S2, the negative pressure in the furnace needs to be adjusted to -20 to -50P on the DCS control system. In step S3, a 50-ton metallurgical crane is used to transfer the hot crude copper from the converter to the anode furnace with a copper bag. During the charging period, no irrelevant personnel are allowed to appear in the charging channel. During the charging period, the crane is commanded by a dedicated person. In step S5, the furnace body is transferred to the oxidation position (31 degrees) for oxidation operation. In step S8, the reduction natural gas pipeline must be purged before opening the natural gas. The natural gas is introduced after the nitrogen flow reaches the set value for 3-5S. When the nitrogen and natural gas flows reach the set value, the natural gas is turned off. After setting the value, slowly rotate the furnace body to the reduction position for reduction operation. In step S8, the natural gas flow rate of the burner is adjusted to 150Nm3 / h for combustion, and the copper liquid temperature needs to be lower than 1230°C after the oxidation is completed, and the stirring nitrogen flow rate is adjusted to the reduction mode. During the reduction in step S8, the outlet temperature of the second combustion chamber is controlled below 550°C, and the inlet temperature of the bag is controlled below 230°C. The reduction end point of the copper sample in step S8 should be: the surface is flat, the pattern is fine and uniform, it is rose red, and the surface is oily. The temperature of the copper liquid after the reduction is about 1230±10°C.

[0036] Embodiment 1

[0037] (1) Different types of materials are put into the furnace: waste anode copper, residual plates, waste copper molds and crude copper are added into the furnace, and the order of adding materials is the burner position, the tail of the furnace body, the burner position, and the middle of the furnace body. After the addition is completed, the natural gas flow rate and the pressure in the furnace are adjusted in time according to the temperature of the copper liquid in the furnace.

[0038] (2) Operation of adding hot material (copper): confirm the time of copper discharge from the converter, clear the redox pipe in advance, ensure that the copper outlet is properly sealed, set the NGL furnace operation mode to the charging mode on the DCS screen, the natural gas burner flow rate to 600Nm3 / h, the redox duct compressed air to 1500Nm3 / h, and the nitrogen stirring system to the insulation state.

[0039] (3) Confirm whether it has entered the oxidation slag-making period: Check the valve group on the oxidation air pipeline, the oxidation compressed air metal hose and the connection for leaks, and whether the pressure is around 0.65 MPa. Confirm that the oxidation air flow rate is 2000 Nm3 / h or open all the oxidation air pneumatic valves and confirm. Check the manual valve on the stirring nitrogen pipeline, the stirring nitrogen hose and the connection for leaks, and the pressure is 0.55 MPa ± 10%. Adjust the stirring nitrogen flow rate to the oxidation mode, confirm that the copper outlet has been completely blocked, and confirm whether there are personnel or parking equipment on the feeding platform, the chute behind the furnace and the platform.

[0040] (4) When the nickel content in the furnace is 0, the nickel removal time is 10 hours.

[0041] Embodiment 2

[0042] (1) Different types of materials are put into the furnace: waste anode copper, residual plates, waste copper molds and crude copper are added into the furnace, and the order of adding materials is the burner position, the tail of the furnace body, the burner position, and the middle of the furnace body. After the addition is completed, the natural gas flow rate and the pressure in the furnace are adjusted in time according to the temperature of the copper liquid in the furnace.

[0043] (2) Operation of adding hot material (copper): confirm the time of copper discharge from the converter, clear the redox pipe in advance, ensure that the copper outlet is properly sealed, set the NGL furnace operation mode to the charging mode on the DCS screen, the natural gas burner flow rate to 650Nm3 / h, the redox duct compressed air to 1500Nm3 / h, and the nitrogen stirring system to the insulation state.

[0044] (3) Confirm whether it has entered the oxidation slag-making period: Check the valve group on the oxidation air pipeline, the oxidation compressed air metal hose and the connection for leaks, and whether the pressure is around 0.65 MPa. Confirm that the oxidation air flow rate is 2000 Nm3 / h or open all the oxidation air pneumatic valves and confirm. Check the manual valve on the stirring nitrogen pipeline, the stirring nitrogen hose and the connection for leaks, and the pressure is 0.55 MPa ± 10%. Adjust the stirring nitrogen flow rate to the oxidation mode, confirm that the copper outlet has been completely blocked, and confirm whether there are personnel or parking equipment on the feeding platform, the chute behind the furnace and the platform.

[0045] (4) When the nickel content in the furnace is 0, the time consumed for nickel removal is 9.3 h.

[0046] Embodiment 3

[0047] (1) Different types of materials are put into the furnace: waste anode copper, residual plates, waste copper molds and crude copper are added into the furnace, and the order of adding materials is the burner position, the tail of the furnace body, the burner position, and the middle of the furnace body. After the addition is completed, the natural gas flow rate and the pressure in the furnace are adjusted in time according to the temperature of the copper liquid in the furnace.

[0048] (2) Operation of adding hot material (copper): confirm the time of copper discharge from the converter, clear the redox pipe in advance, ensure that the copper outlet is properly sealed, set the NGL furnace operation mode to the charging mode on the DCS screen, the natural gas burner flow rate to 700Nm3 / h, the redox duct compressed air to 1500Nm3 / h, and the nitrogen stirring system to the insulation state.

[0049] (3) Confirm whether it has entered the oxidation slag-making period: Check the valve group on the oxidation air pipeline, the oxidation compressed air metal hose and the connection for leaks, and whether the pressure is around 0.65 MPa. Confirm that the oxidation air flow rate is 2000 Nm3 / h or open all the oxidation air pneumatic valves and confirm. Check the manual valve on the stirring nitrogen pipeline, the stirring nitrogen hose and the connection for leaks, and the pressure is 0.55 MPa ± 10%. Adjust the stirring nitrogen flow rate to the oxidation mode, confirm that the copper outlet has been completely blocked, and confirm whether there are personnel or parking equipment on the feeding platform, the chute behind the furnace and the platform.

[0050] (4) When the nickel content in the furnace is 0, the nickel removal time is 9 hours.

[0051] Embodiment 4

[0052] (1) Different types of materials are put into the furnace: waste anode copper, residual plates, waste copper molds and crude copper are added into the furnace, and the order of adding materials is the burner position, the tail of the furnace body, the burner position, and the middle of the furnace body. After the addition is completed, the natural gas flow rate and the pressure in the furnace are adjusted in time according to the temperature of the copper liquid in the furnace.

[0053] (2) Operation of adding hot material (copper): confirm the time of copper discharge from the converter, clear the redox pipe in advance, ensure that the copper outlet is properly sealed, set the NGL furnace operation mode to the charging mode on the DCS screen, the natural gas burner flow rate to 750Nm3 / h, the redox duct compressed air to 1500Nm3 / h, and the nitrogen stirring system to the insulation state.

[0054] (3) Confirm whether it has entered the oxidation slag-making period: Check the valve group on the oxidation air pipeline, the oxidation compressed air metal hose and the connection for leaks, and whether the pressure is around 0.65 MPa. Confirm that the oxidation air flow rate is 2000 Nm3 / h or open all the oxidation air pneumatic valves and confirm. Check the manual valve on the stirring nitrogen pipeline, the stirring nitrogen hose and the connection for leaks, and the pressure is 0.55 MPa ± 10%. Adjust the stirring nitrogen flow rate to the oxidation mode, confirm that the copper outlet has been completely blocked, and confirm whether there are personnel or parking equipment on the feeding platform, the chute behind the furnace and the platform.

[0055] (4) When the nickel content in the furnace is 0, the time consumed for nickel removal is 8.7 hours.

[0056] Embodiment 5

[0057] (1) Different types of materials are put into the furnace: waste anode copper, residual plates, waste copper molds and crude copper are added into the furnace, and the order of adding materials is the burner position, the tail of the furnace body, the burner position, and the middle of the furnace body. After the addition is completed, the natural gas flow rate and the pressure in the furnace are adjusted in time according to the temperature of the copper liquid in the furnace.

[0058] (2) Operation of adding hot material (copper): confirm the time of copper discharge from the converter, clear the redox pipe in advance, ensure that the copper outlet is properly sealed, set the NGL furnace operation mode to the charging mode on the DCS screen, the natural gas burner flow rate to 800Nm3 / h, the redox duct compressed air to 1500Nm3 / h, and the nitrogen stirring system to the insulation state.

[0059] (3) Confirm whether it has entered the oxidation slag-making period: Check the valve group on the oxidation air pipeline, the oxidation compressed air metal hose and the connection for leaks, and whether the pressure is around 0.65 MPa. Confirm that the oxidation air flow rate is 2000 Nm3 / h or open all the oxidation air pneumatic valves and confirm. Check the manual valve on the stirring nitrogen pipeline, the stirring nitrogen hose and the connection for leaks, and the pressure is 0.55 MPa ± 10%. Adjust the stirring nitrogen flow rate to the oxidation mode, confirm that the copper outlet has been completely blocked, and confirm whether there are personnel or parking equipment on the feeding platform, the chute behind the furnace and the platform.

[0060] (4) When the nickel content in the furnace is 0, the nickel removal time is 8 hours.

[0061] Comparative Example 6

[0062] (1) Different types of materials are put into the furnace: waste anode copper, residual plates, waste copper molds and crude copper are added into the furnace, and the order of adding materials is the burner position, the tail of the furnace body, the burner position, and the middle of the furnace body. After the addition is completed, the natural gas flow rate and the pressure in the furnace are adjusted in time according to the temperature of the copper liquid in the furnace.

[0063] (2) Operation of adding hot material (copper): confirm the time of copper discharge from the converter, clear the redox pipe in advance, ensure that the copper outlet is properly sealed, set the NGL furnace operation mode to the charging mode on the DCS screen, the natural gas burner flow rate to 500Nm3 / h, the redox duct compressed air to 1500Nm3 / h, and the nitrogen stirring system to the insulation state.

[0064] (3) Confirm whether it has entered the oxidation slag-making period: Check the valve group on the oxidation air pipeline, the oxidation compressed air metal hose and the connection for leaks, and whether the pressure is around 0.65 MPa. Confirm that the oxidation air flow rate is 2000 Nm3 / h or open all the oxidation air pneumatic valves and confirm. Check the manual valve on the stirring nitrogen pipeline, the stirring nitrogen hose and the connection for leaks, and the pressure is 0.55 MPa ± 10%. Adjust the stirring nitrogen flow rate to the oxidation mode, confirm that the copper outlet has been completely blocked, and confirm whether there are personnel or parking equipment on the feeding platform, the chute behind the furnace and the platform.

[0065] (4) When the nickel content in the furnace is 0, the time consumed for nickel removal is 10.8 h.

[0066] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0067] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for rapid nickel removal in a rotary anode furnace, characterized in that: The following steps are involved: S1: Preliminary preparation: Heat up according to the brick heating curve. When the temperature reaches 1200℃ and is kept constant for 4 hours, the furnace is ready for start-up. Notify the central control system to prepare and notify all public and auxiliary systems to prepare for joint production. S2: Different types of materials are put into the furnace: waste anode copper, residual plates, waste copper molds and crude copper are added into the furnace, and the order of adding materials is the burner position, the tail of the furnace body, the burner position, and the middle of the furnace body. After the addition is completed, the natural gas flow rate and the pressure in the furnace are adjusted in time according to the temperature of the copper liquid in the furnace; S3: Adding hot material (copper): confirm the time of copper discharge from converter, clear the redox pipe in advance, ensure the copper outlet is properly sealed, set the NGL furnace operation mode to charging mode on the DCS screen, the natural gas burner flow rate is 600Nm3 / h-800Nm3 / h, the redox air duct compressed air is 1500Nm3 / h, and the nitrogen stirring system is in the insulation state; S4: Adding quartz sand: Add quartz sand reasonably in the early and middle stages of adding materials according to the grade of the materials entering the furnace; S5: Confirm whether it has entered the oxidation slagging period: Check the valve group on the oxidation air pipeline, whether the oxidation compressed air metal hose and the connection are leaking, whether the pressure is around 0.65Mpa, confirm that the oxidation air flow is 2000Nm3 / h or open all the oxidation air pneumatic valves and confirm, check the manual valve on the stirring nitrogen pipeline, whether the stirring nitrogen hose and the connection are leaking, the pressure is 0.55MPa±10%, adjust the stirring nitrogen flow to the oxidation mode, confirm that the copper outlet has been completely blocked, and confirm whether there are personnel or parking equipment on the feeding platform, the chute behind the furnace and the platform; S6: Entering the slag discharge period: notify the driving to lift the slag bag to the anode furnace slag discharge flatbed truck, adjust the negative pressure in the furnace and the combustion natural gas flow rate on the PLC control system, adjust the negative pressure in the furnace to -20~-50Pa (based on no smoke), stir nitrogen to the slag discharge mode, open the furnace cover, and then operate the furnace handle to tilt the furnace to the slag discharge position, then adjust the furnace to discharge the slag and discharge the slag in the furnace. After the refined slag is discharged, turn the furnace to a safe position and close the furnace cover; S7: Detect copper and nickel content of copper sample: copper sample tested copper content is above 96.5%, nickel content is below 2%, blow air for one hour, add iron oxide powder with content above 80%, continue blow air for one hour, add quartz sand, repeat steps S5 and S6, copper sample tested copper content is below 96.5%, nickel content is above 2%, extend blow air time, increase iron oxide powder with content above 80%, according to actual steps S5 and S6; S8: Entering the reduction period: Check the valve group on the reduction natural gas pipeline, whether the reduction natural gas metal hose and the connection are leaking, whether the natural gas pressure is around 0.6Mpa, open the valve on the reduction natural gas pipeline of the corresponding furnace and confirm, adjust the natural gas flow rate, control it within 650Nm3 / h, and adjust the negative pressure in the furnace to between 0 and -10Pa. After the reduction is completed, operate the furnace rocker handle to turn the furnace to a safe position in the front direction of the furnace, close the pneumatic regulating valve, and the anode furnace reduction is completed.

2. The method for rapid nickel removal of a rotary anode furnace according to claim 1, characterized in that: In step S2, the negative pressure in the furnace needs to be adjusted to -20 to -50P on the DCS control system.

3. The method for rapid nickel removal of a rotary anode furnace according to claim 1, characterized in that: In step S3, a 50-ton metallurgical crane is used to transfer the hot copper ladle from the converter to the anode furnace. During the charging period, no irrelevant personnel are allowed to appear in the charging channel, and the crane is under the command of a special person during the charging period.

4. The method for rapid nickel removal of a rotary anode furnace according to claim 1, characterized in that: In step S5, the furnace body is turned to the oxidation position (31 degrees) to perform oxidation operation.

5. The method for rapid nickel removal in a rotary anode furnace according to claim 1, characterized in that: In step S8, the natural gas pipeline must be purged before opening the natural gas. The natural gas is introduced 3-5 seconds after the nitrogen flow reaches the set value. When the nitrogen and natural gas flows reach the set values, the furnace body is slowly rotated to the reduction position for reduction operation.

6. The method for rapid nickel removal of a rotary anode furnace according to claim 1, characterized in that: In step S8, the natural gas flow rate of the burner is adjusted to 150 Nm3 / h for combustion, and the temperature of the copper liquid is lower than 1230°C after the oxidation is completed, and the stirring nitrogen flow rate is adjusted to the reduction mode.

7. The method for rapid nickel removal in a rotary anode furnace according to claim 1, characterized in that: During the reduction in step S8, the secondary combustion chamber outlet temperature is controlled below 550°C, and the bag inlet temperature is controlled below 230°C.

8. The method for rapid nickel removal in a rotary anode furnace according to claim 1, characterized in that: The end point of reduction of the copper sample in step S8 should be: the surface is flat, the pattern is fine and uniform, it is rose red, the surface is shiny, and the temperature of the copper liquid after the reduction is completed is about 1230±10°C.

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