Melting and holding furnace for producing high nickel matte anode plate by using solid high nickel matte and production process of melting and holding furnace

Abstract

The invention discloses a melting holding furnace for producing a high-nickel matte anode plate by using solid high-nickel matte and a production process thereof, and belongs to the technical field of high-nickel matte production. According to the method, the solid high-grade matte nickel material containing 60%-73% of nickel is directly added into a melting and holding furnace. The melting and holding furnace can rotate, a spray gun can be conveniently located at different positions, molten solid high nickel matte is promoted to form a molten pool, oxygen-enriched gas with the concentration of 50% formed by mixing oxygen and compressed air is introduced into an inner channel of the spray gun, mixed gas of natural gas and nitrogen is introduced into an outer channel of the spray gun, the combustion-oxygen ratio is 1.6-1.8, and then it is guaranteed that the temperature of the melting and holding furnace reaches 1150-1350 DEG C; and materials can be continuously melted. The solid high-grade matte nickel is melted and smelted to generate molten high-grade matte nickel, the molten high-grade matte nickel is introduced into a linear casting machine through a discharge chute to be cast into the high-grade matte nickel anode plate, and a smeltery produces a high-grade matte nickel anode plate product with the grade of about 60%-78%. The method is short in technological process and low in production cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of nickel matte production, and particularly relates to a melting and heat-preserving furnace for producing nickel matte anode plates from solid nickel matte and a process for producing nickel matte anode plates. Background Art

[0002] Currently, in the production of traditional nickel matte anode plates, after nickel concentrate is proportioned, it is transported to an Ausmelt furnace together with quartz flux by a conveyor belt. Air, oxygen, and pulverized coal fuel are sprayed into the Ausmelt furnace through a lance to provide heat. The smelting temperature of the Ausmelt furnace reaches about 1400 °C to melt the furnace charge to form a melt. The Ausmelt furnace produces low-grade nickel matte with a quality of 30% - 35% and waste slag containing about 0.3% nickel. The mixture of low-grade nickel matte and slag continuously flows into a settling electric furnace for sedimentation separation, and the waste slag is quenched with water. The low-grade nickel matte is transported to a converter for blowing through a matte ladle to produce nickel matte. The converter slag is returned to the settling electric furnace, and the hot nickel matte enters a heat-preserving furnace for casting anode plates. It can be seen that in the prior art, the production of nickel matte anode plates all uses low-grade nickel matte, and the heat-preserving furnace used directly receives the hot nickel matte produced through multiple processes. To ensure the temperature inside the furnace, a diesel gun and an air combustion-supporting air duct are provided at one end wall of the heat-preserving furnace. Since the temperature of air combustion support is limited, it can only maintain the temperature inside the furnace, cannot melt solid nickel matte, and cannot simplify the production process of nickel matte anode plates. There has been no report on a device and process for directly melting solid nickel matte to produce nickel matte anode plates so far.

[0003] Therefore, there is an urgent need for a new technical solution in the prior art to solve this problem. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a melting and heat-preserving furnace for producing nickel matte anode plates from solid nickel matte and its production process to solve the technical problem that there is no device and process for directly melting solid nickel matte to produce nickel matte anode plates.

[0005] A melting and heat-preserving furnace for producing nickel matte anode plates using solid nickel matte high-ice nickel includes a heat-preserving furnace body and a furnace body rotation structure. The furnace body rotation structure is connected to the outer wall of the heat-preserving furnace body, and the furnace body rotation structure controls the heat-preserving furnace body to rotate along the central axis of the heat-preserving furnace body and stay at a specified angle. The heat-preserving furnace body is a horizontally placed cylindrical tank body. Under the condition that the heat-preserving furnace body has no rotation angle, a feeding port and a smoke exhaust port are arranged at the upper part of the cylindrical surface of the heat-preserving furnace body, a main nickel matte discharge port is arranged at the lower part of one circular side wall of the heat-preserving furnace body, and more than three spray guns are arranged side by side at the lower part of the cylindrical surface of the heat-preserving furnace body. The spray gun includes two coaxial inner and outer channels. The inner channel is filled with oxygen-rich gas with a concentration of 50% formed by mixing oxygen and compressed air, and the outer channel is filled with a mixed gas of natural gas and nitrogen, so that the fuel-oxygen ratio is 1.6 - 1.8. After adding solid nickel matte high-ice nickel, the spray gun rotates with the heat-preserving furnace body to a set angle, so that the spray gun nozzle is located above the surface of the solid nickel matte high-ice nickel and generates a combustion flame, realizing the melting of the solid nickel matte high-ice nickel to form a molten pool. When the molten pool surface reaches the set height, the heat-preserving furnace body rotates to 0°, and the spray gun generates a combustion flame under the molten pool surface, so that the high-speed air flow generated by the spray gun stirs the molten pool and ensures that the temperature of the molten pool is maintained at 1150°C - 1350°C.

[0006] The straight line where the spray gun nozzle of the spray gun is located passes through the central axis of the heat-preserving furnace body. Under the condition that the heat-preserving furnace body has no rotation angle, the spray gun nozzle makes an angle of 40° counterclockwise in the plane with the central vertical line of the heat-preserving furnace body.

[0007] Under the condition that the heat-preserving furnace body has no rotation angle, the main nickel matte discharge port is arranged at the position of the central vertical line of the circular side wall of the heat-preserving furnace body.

[0008] A spare nickel matte discharge port is also arranged at the lower part of the circular side wall of the heat-preserving furnace body. Under the condition that the heat-preserving furnace body has no rotation angle, the central vertical line of the circular side wall of the heat-preserving furnace body and the radial straight line where the spare nickel matte discharge port is located form an angle of 50° clockwise.

[0009] A cold material bin is arranged above the feeding port. The feeding end of the cold material bin is loaded with solid nickel matte high-ice nickel materials by a bridge crane. The discharging end of the cold material bin is externally connected with a converter electric shock feeder and a mobile belt conveyor in sequence. The belt conveyor is movably connected with the feeding port through a movable feeding chute.

[0010] The air inlet end of the spray gun is connected to a gas distribution valve station. The gas distribution valve station is connected to the main valve station. The main valve station is respectively connected to a liquid oxygen pump, an air compressor, a liquid nitrogen pump, and a natural gas booster station.

[0011] A discharge chute is arranged below the main nickel matte discharge port. The discharge chute is connected to a casting machine. The casting machine casts the molten nickel matte to produce nickel matte anode plate products.

[0012] The outside of the smoke exhaust port is successively connected with a bag filter, a high-temperature smoke exhaust fan, and a flue gas desulfurization device for the holding furnace.

[0013] The furnace body rotating structure includes a main drive hub, a secondary drive hub, a roller support seat, and rollers; the main drive hub and the secondary drive hub are respectively sleeved on the outer sides of the holding furnace body, the main drive hub is drivingly connected with a motor, and both sides of the lower part of the main drive hub are each in rolling connection with two rollers (204); both sides of the lower part of the secondary drive hub are each in rolling connection with two rollers (204); the lower parts of the rollers are fixedly installed on the production platform through the roller support seats.

[0014] A process for producing high-ice nickel anode plates using the melting holding furnace described above includes the following steps, and the following steps are carried out sequentially:

[0015] Step 1: Keep the holding furnace body in a state without a rotation angle, and add solid high-ice nickel materials into the holding furnace body successively through a bridge crane, a cold material bin, a converter electric shock feeder, a mobile belt conveyor, and a movable feeding chute. The solid high-ice nickel materials contain 60% - 73% nickel, <15% copper, 2% - 4.5% iron, 20% - 23% sulfur, the moisture content is less than 1%, the particle size is 3mm - 8mm, and the initial addition of solid high-ice nickel materials is 2t.

[0016] Step 2: Drive the furnace body rotating structure to rotate the holding furnace body by a specified angle. At this time, the spray gun rotates to a higher angle along with it, so that the spray gun outlet rotates out above the solid high-ice nickel materials, and keep the rotation angle of the holding furnace body unchanged.

[0017] Step 3: Open the air inlet ends of all spray guns. A rich oxygen gas with a concentration of 50% formed by mixing oxygen and compressed air is introduced into the inner channel of the spray gun, and a mixed gas of natural gas and nitrogen is introduced into the outer channel of the spray gun. The pressure of the rich oxygen gas sprayed by the three spray guns is 0.4MPa - 0.6MPa, and the rich oxygen concentration is 50%; the total oxygen flow rate is 380 Nm 3 / h - 440 Nm 3 / h; the total compressed air flow rate is 660 Nm 3 / h - 730 Nm 3 / h; the natural gas pressure is 0.4MPa - 0.6MPa, the total natural gas flow rate is 310 Nm 3 / h - 340 Nm 3 / h, and the fuel-oxygen ratio is 1.6 - 1.8; the total nitrogen flow rate is 100 Nm 3 / h - 200 Nm 3 / h;

[0018] The spray gun burns in a rich oxygen environment, so that the temperature in the holding furnace body reaches 1150 - 1350 °C, and the solid high-ice nickel materials are melted.

[0019] Step 4: After an interval of a set time, continue to add solid nickel matte material into the holding furnace. The continuous combustion of the spray gun keeps the temperature in the holding furnace at 1150°C - 1350°C, causing the solid nickel matte material to continuously melt. When the molten pool surface reaches 350 mm - 450 mm, the formation of the molten pool ends.

[0020] Step 5: Drive the furnace body rotation structure to align the holding furnace, i.e., there is no rotation angle. At this time, the head of the spray gun is immersed in the nickel matte layer of the melt. The spray gun continuously burns, and under the action of the high-speed gas flow of the spray gun, the molten pool is stirred to make the temperature of the molten pool uniform, and the temperature is maintained at 1150°C - 1350°C.

[0021] Step 6: Continue to add solid nickel matte material, with the addition amount being 0 - 4 t / h. The solid nickel matte material continues to melt. The pressure of the oxygen-rich gas ejected by the three spray guns is 0.4 MPa - 0.6 MPa, and the oxygen-rich concentration is 50%; the total oxygen flow rate is 380 Nm 3 / h - 440 Nm 3 / h; the total compressed air flow rate is 660 Nm 3 / h - 730 Nm 3 / h; the natural gas pressure is 0.4 MPa - 0.6 MPa, and the total natural gas flow rate is 310 Nm 3 / h - 340 Nm 3 / h, and the fuel-oxygen ratio is 1.6 - 1.8; the total nitrogen flow rate is 100 Nm 3 / h - 200 Nm 3 / h;

[0022] Step 7: When the molten pool surface reaches 730 mm - 770 mm, oxygen drilling and discharging are carried out at the main nickel matte discharge port, and the molten high nickel matte flows into the casting machine to produce high nickel matte anode plate products; the high nickel matte anode plate products contain 60% - 78% nickel, <15% copper, 2% - 4.5% iron, and 18% - 22% sulfur;

[0023] Step 8: When the molten pool surface reaches 630 mm - 670 mm, stop discharging by plugging the opening, and continue to add solid nickel matte material to melt and raise the molten pool surface.

[0024] Through the above design scheme, the present invention can bring the following beneficial effects:

[0025] For the production of traditional high nickel matte anode plates mentioned in the background technology, high nickel matte anode plate products with a grade of about 60% are produced, the process flow is long, and the production cost per ton of metallic nickel is as high as 10,000 yuan.

[0026] Compared with the above-mentioned traditional process, in the present invention, solid nickel matte containing 60% - 73% nickel is directly added to the melting and holding furnace. The melting and holding furnace can rotate, which is convenient for the lance to be located at different positions, promoting the formation of a molten pool by melting the solid nickel matte. The inner channel of the lance is introduced with a 50% oxygen-rich gas formed by mixing oxygen and compressed air, and the outer channel is introduced with a mixed gas of natural gas and nitrogen, so that the fuel-oxygen ratio is 1.6 - 1.8, thereby ensuring that the temperature of the melting and holding furnace reaches 1150°C - 1350°C and can continuously melt the material. After melting and smelting, the solid nickel matte generates molten nickel matte, which is then introduced into a straight casting machine through a discharge chute to be cast into high nickel matte anode plates. The smelter produces high nickel matte anode plate products with a grade of about 60% - 78%. Producing high nickel matte anode plates from solid nickel matte has a short process flow and low production cost, only 2800 yuan per ton of metallic nickel, with extremely high economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the drawings and specific embodiments:

[0028] Figure 1 FIG. is a schematic structural diagram of the melting and holding furnace for producing high nickel matte anode plates from solid nickel matte in the present invention and the melting and holding furnace in its production process;

[0029] Figure 2 FIG. is a schematic structural diagram of the holding furnace body in the melting and holding furnace for producing high nickel matte anode plates from solid nickel matte in the present invention and its production process;

[0030] Figure 3 FIG. is a schematic internal structural diagram of the holding furnace body in the melting and holding furnace for producing high nickel matte anode plates from solid nickel matte in the present invention and its production process;

[0031] Figure 4 FIG. is a schematic side view structural diagram of the holding furnace body in the melting and holding furnace for producing high nickel matte anode plates from solid nickel matte in the present invention and its production process;

[0032] Figure 5 FIG. is a process flow block diagram in the melting and holding furnace for producing high nickel matte anode plates from solid nickel matte in the present invention and its production process.

[0033] In the figures, 1 - holding furnace body, 101 - feeding port, 102 - smoke exhaust port, 103 - main nickel matte discharge port, 104 - lance, 105 - spare nickel matte discharge port, 2 - furnace body rotation structure, 201 - main drive hub, 202 - auxiliary drive hub, 203 - idler seat, 204 - idler. SPECIFIC EMBODIMENTS

[0034] As Figures 1 to 5As shown in the figure, a melting and heat preservation furnace for producing high-ice nickel anodes using solid high-ice nickel includes a heat preservation furnace body 1 and a furnace body rotation structure 2. The furnace body rotation structure 2 is connected to the outer wall of the heat preservation furnace body 1, and the furnace body rotation structure 2 controls the heat preservation furnace body 1 to rotate along the central axis of the heat preservation furnace body 1 and stay at a specified angle. The furnace body rotation structure 2 includes a main drive hub 201 installed on the outside of the heat preservation furnace body 1 near the charging port 101 and a secondary drive hub 202 installed on the inside near the smoke exhaust port 102. On both sides of the lower part of the main drive hub 201, two sets of roller support seats 203 and roller 204 installation components are correspondingly installed. On both sides of the lower part of the secondary drive hub 202, two sets of roller support seats 203 and roller 204 installation components are also correspondingly installed. In each set of installation components, two rollers 204 are installed on one roller support seat 203. The main drive hub 201 is connected to the motor through a transmission device (such as a conveyor belt or transmission gears, etc.), and the motor provides power for the rotation of the heat preservation furnace body 1. When the motor operates, power is transmitted to the main drive hub 201 through the transmission device. Since the main drive hub 201 is placed on the rollers 204, under the drive of the power, the main drive hub 201 will roll on the rollers 204, and then drive the secondary drive hub 202 to roll on the rollers 204, thereby realizing the rotation of the heat preservation furnace body 1. Such a design can enable the heat preservation furnace body 1 to rotate safely and smoothly.

[0035] The heat preservation furnace body 1 is a horizontally placed cylindrical tank. Under the condition that the heat preservation furnace body 1 has no rotation angle, a charging port 101 is provided at the upper part of the cylindrical surface of the heat preservation furnace body 1, a smoke exhaust port 102 is provided, and a main nickel matte discharge port 103 is provided at the lower part of the circular side wall of the heat preservation furnace body 1. Three or more spray guns 104 are arranged side by side at the lower part of the cylindrical surface of the heat preservation furnace body 1. Under the condition that the heat preservation furnace body 1 has no rotation angle, the straight line where the spray nozzle of the spray gun 104 is located forms an angle of 40° counterclockwise with the central vertical line of the circular side wall of the heat preservation furnace body 1. The air inlet end of the spray gun 104 is connected to a gas distribution valve station, and the gas distribution valve station sends oxygen-rich air, natural gas, and nitrogen mixed with oxygen and compressed air to the spray gun 104; the gas distribution valve station is connected to the main valve station, and the main valve station is respectively connected to a liquid oxygen pump, an air compressor, a liquid nitrogen pump, and a natural gas booster station. The main valve station transports oxygen, compressed air, nitrogen, and natural gas to the gas distribution valve station. The spray gun 104 includes two coaxial inner and outer channels. The inner channel passes through a 50% oxygen-rich gas formed by mixing oxygen and compressed air, and the outer channel passes through a mixed gas of natural gas and nitrogen, so that the fuel-oxygen ratio is 1.6 - 1.8;

[0036] After adding solid high-ice nickel, the heat preservation furnace body 1 rotates to a set angle, and the spray gun 104 rotates to a higher angle accordingly, so that the spray gun nozzle is located above the surface of the solid high-ice nickel and a combustion flame is generated, realizing the melting of the solid high-ice nickel to form a molten pool. When the molten pool surface reaches the set height, the heat preservation furnace body 1 rotates to 0°, and the spray gun 104 generates a combustion flame under the molten pool surface, so that the high-speed air flow generated by the spray gun 104 stirs the molten pool and ensures that the temperature of the molten pool is maintained at 1150°C to 1350°C.

[0037] Under the condition that the heat preservation furnace body 1 does not rotate, the main nickel matte discharge port 103 is arranged at the central vertical line position of the circular side wall of the heat preservation furnace body 1. A spare nickel matte discharge port 105 is also arranged on the lower part of the circular side wall of the heat preservation furnace body 1. Under the condition that the heat preservation furnace body 1 does not rotate, the central vertical line of the circular side wall of the heat preservation furnace body 1 and the radial line where the spare nickel matte discharge port 105 is located form an angle of 50° clockwise.

[0038] A cold material bin is arranged above the feeding port 101; the feeding end of the cold material bin is loaded with solid high-ice nickel materials by a bridge crane, and the discharging end of the cold material bin is externally connected with a converter electric shock feeder and a mobile belt conveyor in sequence. The belt conveyor is movably connected with the feeding port 101 through a movable feeding chute;

[0039] A discharge chute is arranged below the main nickel matte discharge port 103; the discharge chute is connected with a casting machine; the casting machine casts the molten high-ice nickel to produce high-ice nickel anode plate products;

[0040] The outside of the smoke exhaust port 102 is connected with a bag filter, a high-temperature smoke exhaust machine and a heat preservation furnace flue gas desulfurization device in sequence, so that the generated sulfur dioxide-containing flue gas enters the heat preservation furnace flue gas desulfurization device, effectively reducing the sulfur dioxide concentration of the discharged flue gas and realizing the up-to-standard discharge of sulfur dioxide-containing smelting flue gas.

[0041] A smoke collecting hood and a water-cooled movable smoke collecting door can also be arranged in sequence between the smoke exhaust port 102 and the bag filter to increase the smoke collecting efficiency.

[0042] A process for producing high-ice nickel anode plates using the melting and heat preservation furnace described above includes the following steps, and the following steps are carried out sequentially,

[0043] Step 1: Keep the heat preservation furnace body 1 in a state of not rotating, and add solid high-ice nickel materials into the heat preservation furnace body 1 through a bridge crane, a cold material bin, a converter electric shock feeder, a mobile belt conveyor and a movable feeding chute in sequence. The solid high-ice nickel materials contain 60% to 73% nickel, less than 15% copper, 2% to 4.5% iron, 20% to 23% sulfur, less than 1% water, and the particle size is 3mm to 8mm. The initial addition of solid high-ice nickel materials is 2t;

[0044] Step 2: Drive the furnace body rotation structure 2 to rotate the heat preservation furnace body 1 by a specified angle. At this time, the spray gun 104 rotates out above the solid high-ice nickel material, and keep the rotation angle of the heat preservation furnace body 1 unchanged;

[0045] Step 3: Open the air inlet ends of all the spray guns 104. The inner channels of the spray guns 104 are filled with oxygen-rich gas with a concentration of 50% formed by mixing oxygen and compressed air, and the outer channels of the spray guns 104 are filled with a mixed gas of natural gas and nitrogen. The pressure of the oxygen-rich gas sprayed by the three spray guns is 0.4 MPa to 0.6 MPa, and the oxygen-rich concentration is 50%; the total oxygen flow rate is 380 Nm 3 / h to 440 Nm 3 / h; the total compressed air flow rate is 660 Nm 3 / h to 730 Nm 3 / h; the natural gas pressure is 0.4 MPa to 0.6 MPa, and the total natural gas flow rate is 310 Nm 3 / h to 340 Nm 3 / h, and the fuel-oxygen ratio is 1.6 to 1.8; the total nitrogen flow rate is 100 Nm 3 / h to 200 Nm 3 / h;

[0046] The spray gun 104 burns in an oxygen-rich environment to raise the temperature inside the heat preservation furnace body 1 to 1150 °C to 1350 °C, melting the solid high-ice nickel material;

[0047] Step 4: At set time intervals, continue to add solid high-ice nickel material into the heat preservation furnace body 1. The continuous burning of the spray gun 104 keeps the temperature inside the heat preservation furnace body 1 at 1150 °C to 1350 °C, continuously melting the solid high-ice nickel material until the molten pool surface reaches 350 mm to 450 mm, ending the formation of the molten pool;

[0048] Step 5: Drive the furnace body rotation structure 2 to return the heat preservation furnace body 1 to its original position, i.e., without any rotation angle. At this time, the nozzle head of the spray gun 104 is immersed in the nickel matte layer of the melt. The spray gun 104 continues to burn, and the molten pool is stirred by the high-speed airflow of the spray gun 104 to make the temperature of the molten pool uniform, maintaining the temperature at 1150 °C to 1350 °C.

[0049] Step 6: Continue to add solid high-ice nickel material at an addition rate of 0 to 4 t / h. The solid high-ice nickel material continues to melt. The pressure of the oxygen-rich gas sprayed by the three spray guns is 0.4 MPa to 0.6 MPa, and the oxygen-rich concentration is 50%; the total oxygen flow rate is 380 Nm 3 / h to 440 Nm 3 / h; the total compressed air flow rate is 660 Nm 3 / h to 730 Nm 3 / h; the natural gas pressure is 0.4 MPa to 0.6 MPa, and the total natural gas flow rate is 310 Nm 3 / h to 340 Nm 3 / h, with an oxygen-fuel ratio of 1.6 to 1.8; the total nitrogen flow rate is 100 Nm 3 / h to 200 Nm 3 / h.

[0050] Step 7: When the molten bath surface reaches 730 mm to 770 mm, the main nickel matte discharge port 103 is drilled with oxygen for discharge, and the molten high nickel matte flows into the casting machine to produce high-ice nickel anode plate products; the high-ice nickel anode plate products contain 60% to 78% nickel, <15% copper, 2% to 4.5% iron, and 18% to 22% sulfur.

[0051] Step 8: When the molten bath surface reaches 630 mm to 670 mm, the nozzle is blocked to stop the discharge, and the solid high-ice nickel material is continuously melted to raise the molten bath surface.

[0052] When the heat preservation furnace body 1 does not rotate, that is, when it is in the 0° position, the position of the nozzle of the spray gun 104 has a 40° counterclockwise angle along the center vertical line of the heat preservation furnace. When the heat preservation furnace body 1 rotates 50° counterclockwise along the center vertical line of the circle, it is the blast outage position and also the spray gun maintenance position. At this time, the bottom blowing spray gun rotates out from the liquid molten bath surface. When the heat preservation furnace rotates 83° counterclockwise along the center vertical line of the circle, it is the slag skimming limit position, and slag is discharged through the smoke exhaust port 102.

[0053] Example:

[0054] The main process parameters for producing high-ice nickel anode plates using the melting and heat preservation furnace for producing high-ice nickel anode plates from solid high-ice nickel are shown in Table 1.

[0055] Table 1 Main process parameters

[0056]

[0057] Each process technical control point and process control index are shown in Table 2.

[0058] Table 2 Process technical control points and process control indexes

[0059]

[0060] The components of solid high-ice nickel added to the melting and heat preservation furnace are shown in Table 3.

[0061] Table 3 Composition table of solid high-ice nickel material (%)

[0062]

[0063] The composition of the high-ice nickel anode plate product prepared by the present invention is shown in Table 4.

[0064] Table 4 Composition table of high-ice nickel anode plate product (%)

[0065]

[0066] It can be seen that the melting and heat preservation furnace for producing nickel matte anode plates using solid nickel matte according to the design of the present invention can produce nickel matte anode plate products with a grade of about 60% to 78%, which is superior to the nickel matte anode plates with a grade of about 60% produced by traditional technologies.

Claims

1. A melting and heat-preserving furnace for producing nickel matte anode plates from solid nickel matte, characterized in that: It includes a heat-insulating furnace body (1) and a furnace body rotation structure (2). The furnace body rotation structure (2) is connected to the outer wall of the heat-insulating furnace body (1). The furnace body rotation structure (2) controls the heat-insulating furnace body (1) to rotate along the central axis of the heat-insulating furnace body (1) and stay at a specified angle. The heat-insulating furnace body (1) is a horizontally placed cylindrical tank. Under the condition that the heat-insulating furnace body (1) has no rotation angle, a charging port (101) and a smoke exhaust port (102) are arranged at the upper part of the cylindrical surface of the heat-insulating furnace body (1). A main nickel matte discharge port (103) is arranged at the lower part of the circular side wall of one side of the heat-insulating furnace body (1). More than three spray guns (104) are arranged side by side at the lower part of the cylindrical surface of the heat-insulating furnace body (1). The spray gun (104) includes two coaxial inner and outer channels. The inner channel is filled with oxygen-rich gas with a concentration of 50% formed by mixing oxygen and compressed air, and the outer channel is filled with a mixed gas of natural gas and nitrogen, so that the fuel-oxygen ratio is 1.6 - 1.

8. After adding solid nickel matte, the spray gun (104) rotates with the heat-insulating furnace body (1) to a set angle, so that the spray gun nozzle is located above the material surface of the solid nickel matte and generates a combustion flame, realizing the melting of the solid nickel matte to form a molten pool. When the molten pool surface reaches the set height, the heat-insulating furnace body (1) rotates to 0°, and the spray gun (104) generates a combustion flame under the molten pool surface, so that the high-speed air flow generated by the spray gun (104) stirs the molten pool and ensures that the temperature of the molten pool is maintained at 1150°C - 1350°C.

2. The melting and heat preservation furnace for producing high-ice nickel anode plates using solid high-ice nickel as claimed in claim 1, wherein: The straight line where the spray gun nozzle of the spray gun (104) is located passes through the central axis of the heat-insulating furnace body (1). Under the condition that the heat-insulating furnace body (1) has no rotation angle, the spray gun nozzle of the spray gun (104) forms an angle of 40° counterclockwise in the plane with the central vertical line of the heat-insulating furnace body (1).

3. The melting and heat preservation furnace for producing nickel matte anode plates using solid nickel matte as claimed in claim 1, wherein: Under the condition that the heat-insulating furnace body (1) has no rotation angle, the main nickel matte discharge port (103) is arranged at the position of the central vertical line of the circular side wall of the heat-insulating furnace body (1).

4. The melting and heat preservation furnace for producing high-ice nickel anode plates using solid high-ice nickel as claimed in claim 1, wherein: A spare nickel matte discharge port (105) is also arranged at the lower part of the circular side wall of the heat-insulating furnace body (1). Under the condition that the heat-insulating furnace body (1) has no rotation angle, the central vertical line of the circular side wall of the heat-insulating furnace body (1) forms an angle of 50° clockwise with the radial straight line where the spare nickel matte discharge port (105) is located.

5. The melting and heat preservation furnace for producing high nickel matte anode plates using solid high nickel matte as claimed in claim 1, characterized in that: A cold material bin is arranged above the charging port (101). The feeding end of the cold material bin is loaded with solid nickel matte through a bridge crane. The discharging end of the cold material bin is externally connected with a converter electric shock feeder and a mobile belt conveyor in sequence. The belt conveyor is movably connected with the charging port (101) through a movable feeding chute. The air inlet end of the spray gun (104) is connected to a gas distribution valve station. The gas distribution valve station is connected to the main valve station. The main valve station is respectively connected to a liquid oxygen pump, an air compressor, a liquid nitrogen pump and a natural gas booster station. A discharge chute is arranged below the main nickel matte discharge port (103). The discharge chute is connected to a casting machine. The casting machine casts the molten nickel matte to produce high ice nickel anode plate products. The outside of the smoke exhaust port (102) is sequentially connected with a bag filter, a high-temperature smoke exhaust machine and a heat-insulating furnace flue gas desulfurization device.

6. The melting and heat preservation furnace for producing high nickel matte anode plates using solid high nickel matte as claimed in claim 1, characterized in that: The furnace body rotation structure (2) includes a main drive hub (201), a secondary drive hub (202), a roller support (203), and rollers (204); the main drive hub (201) and the secondary drive hub (202) are respectively sleeved on both outer sides of the heat preservation furnace body (1), the main drive hub (201) is drivingly connected to a motor, and both sides of the lower part of the main drive hub (201) are each in rolling connection with two rollers (204); both sides of the lower part of the secondary drive hub (202) are each in rolling connection with two rollers (204); the lower parts of the rollers (204) are fixedly installed on the production platform through the roller supports (203).

7. A process for producing nickel matte anode plates using the melting and holding furnace described in claim 1, characterized in that: It includes the following steps, and the following steps are carried out sequentially, Step 1: Keep the heat preservation furnace body (1) in a state without a rotation angle, and add the solid high-ice nickel material into the heat preservation furnace body (1) successively through a bridge crane, a cold material bin, a converter electric shock feeder, a mobile belt conveyor, and a movable feeding chute. The solid high-ice nickel material contains 60% - 73% nickel, <15% copper, 2% - 4.5% iron, 20% - 23% sulfur, less than 1% moisture, with a particle size of 3mm - 8mm, and the initial addition of the solid high-ice nickel material is 2t; Step 2: Drive the furnace body rotation structure (2) to rotate the heat preservation furnace body (1) by a specified angle. At this time, the spray gun (104) rotates to a higher angle along with it, so that the spray gun nozzle rotates out above the solid high-ice nickel material, and keep the rotation angle of the heat preservation furnace body (1) unchanged; Step 3: Open the intake ends of all the spray guns (104). An oxygen-rich gas with a concentration of 50% formed by mixing oxygen and compressed air is introduced into the inner channels of the spray guns (104), and a mixed gas of natural gas and nitrogen is introduced into the outer channels of the spray guns (104). The pressure of the oxygen-rich gas ejected from the three spray guns (104) is 0.4 MPa to 0.6 MPa, and the oxygen-rich concentration is 50%; the total oxygen flow rate is 380 Nm 3 / h to 440 Nm 3 / h; the total compressed air flow rate is 660 Nm 3 / h to 730 Nm 3 / h; the natural gas pressure is 0.4 MPa to 0.6 MPa, and the total natural gas flow rate is 310 Nm 3 / h to 340 Nm 3 / h, and the fuel-oxygen ratio is 1.6 to 1.8; the total nitrogen flow rate is 100 Nm 3 / h to 200 Nm 3 / h; The spray gun (104) burns in an oxygen-rich environment, so that the temperature in the heat preservation furnace body (1) reaches 1150 - 1350 °C, and the solid high-ice nickel material is melted; Step 4: At an interval of a set time, continue to add the solid high-ice nickel material into the heat preservation furnace body (1). The continuous burning of the spray gun (104) keeps the temperature in the heat preservation furnace body (1) at 1150 °C - 1350 °C, so that the solid high-ice nickel material continues to melt, and the formed molten pool surface reaches 350mm - 450mm, and the formation of the molten pool ends; Step 5: Drive the furnace body rotation structure (2) to make the heat preservation furnace body (1) return to the original position, that is, without a rotation angle. At this time, the spray gun head of the spray gun (104) is immersed in the nickel matte layer of the melt, and the spray gun (104) burns continuously. Under the action of the high-speed air flow of the spray gun (104), the molten pool is stirred, so that the temperature of the molten pool is uniform, and the temperature is maintained at 1150 °C - 1350 °C; Step 6: Continuously add solid high-ice nickel material with an addition rate of 0 - 4 t / h. The solid high-ice nickel material continues to melt. The pressure of the oxygen-rich gas ejected by the three spray guns (104) is 0.4 MPa - 0.6 MPa, and the oxygen-rich concentration is 50%; the total oxygen flow rate is 380 Nm 3 / h - 440 Nm 3 / h; the total compressed air flow rate is 660 Nm 3 / h - 730 Nm 3 / h; the natural gas pressure is 0.4 MPa - 0.6 MPa, and the total natural gas flow rate is 310 Nm 3 / h - 340 Nm 3 / h, and the fuel-oxygen ratio is 1.6 - 1.8; the total nitrogen flow rate is 100 Nm 3 / h - 200 Nm 3 / h; Step 7: When the molten pool surface reaches 730mm - 770mm, the main nickel matte discharge port (103) conducts oxygen drilling and discharging, and the molten high nickel matte flows into the casting machine to produce high-ice nickel anode plate products; the high-ice nickel anode plate products contain 60% - 78% nickel, <15% copper, 2% - 4.5% iron, and 18% - 22% sulfur; Step 8: When the molten pool surface reaches 630mm - 670mm, plug the opening to stop discharging, and continue to melt the solid high-ice nickel material to raise the molten pool surface.

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