Grading type electromagnetic smelting device

Abstract

A graded electromagnetic smelting device comprises a recovery furnace shell, a heat preservation layer and a secondary liquid filter screen. A cooling fan is arranged on the inner side of the recovery furnace shell; the insulating layer is arranged on the inner side of the recovery furnace shell, and the upper end is connected with the recovery furnace shell; a nitrogen input channel is formed in the top of the left side; a temperature sensor is arranged at the top end of the right side in the heat preservation layer; an A-level coil, a B-level coil and a C-level coil are wound outside the heat preservation layer from top to bottom; a motor is arranged in the center of the outer side of the bottom of the heat preservation layer; the secondary liquid filter screen is arranged in the heat preservation layer, and a stirring device is arranged in the center of the bottom; a balancer is arranged at the top of the second-stage liquid filter screen, and a first-stage zinc material recycling basket is arranged in the second-stage liquid filter screen; according to the utility model, lead, zinc and oxides in the zinc slag are accurately separated in a physical heating manner, so that the zinc material is recycled and reused in a green and efficient manner, and the production cost of iron rod hot galvanizing is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot-dip galvanizing, and particularly relates to a hierarchical electromagnetic melting device. Background Art

[0002] With the continuous advancement of the industrialization process, millions of tons of precious metal smelting waste are generated globally every year. Zinc, as an important non-ferrous metal, is widely used in industries such as construction, machinery, and electricity. Hot-dip galvanizing is a method of immersing pickled steel components into molten zinc to obtain a metal coating, which can effectively delay the environmental corrosion of steel materials. During the hot-dip galvanizing process of steel components, when the workpiece is immersed in the zinc bath in the zinc pot, zinc dross floating on the surface of the molten zinc and zinc bottom slag composed of an iron-zinc alloy layer accumulating at the bottom of the zinc pot are usually generated. Due to its diverse production processes, the lead-adding process will also cause the mixing of lead and zinc in solid waste, resulting in complex compositions of zinc slag. The long-term storage of zinc slag will not only cause waste of valuable metal resources but also cause environmental pollution. Therefore, recycling the zinc slag generated during the hot-dip galvanizing process by recycling enterprises and improving the reuse rate of zinc slag not only conforms to the current green and efficient production concept advocated in China but also can improve industrial efficiency and reduce production costs.

[0003] Currently, in the existing electromagnetic melting devices on the market, the diameter and size of the induction coil are fixed, and the structure is single, unable to achieve precise gradient induction heating during the zinc recovery melting process and adaptively match the melting process according to the volume of zinc materials. The utility model sets three-stage coils to heat the zinc slag in different regions, and can adapt to the melting of zinc materials with different volumes by adjusting the current power and frequency of the three-stage coils A, B, and C, with stronger adaptability and melting efficiency.

[0004] In order to recover and recycle zinc, Chinese Patent 202010423231.9 proposed a method for directly recovering and recycling zinc using a molten gasification furnace, which uses an alkaline activator to cold-bond metallurgical dust into pellets and processes the pellet blocks through a molten gasification furnace. Chinese Patent 202310708208.8 discloses a method for recycling and regenerating hot-dip galvanized zinc slag. By setting a diversion mechanism and a second triggering mechanism, the zinc slag can be mixed with inert gas while being melted, solving the problems that subsequent process treatment needs to wait until the zinc slag is completely liquefied and the uneven mixing of inert gas and gaseous zinc caused by the gradual decrease of the liquid zinc surface. However, the existing zinc recovery methods all use chemical reactions to reduce metallic zinc. The utility model precisely controls the heating process in different regions, uses 300°C and 400°C as the temperature control lines for the first heating stage and the second heating stage respectively, recovers two metals, lead and zinc, from the zinc slag, and effectively prevents environmental pollution caused by the vaporization of lead metal. Summary of the Invention

[0005] The main purpose of the present utility model is to provide a hierarchical electromagnetic smelting device and a zinc recovery method based on the smelting device, which can solve the problems of metal lead vaporization and incomplete metal separation during the zinc slag recovery process, effectively and accurately separate lead, zinc and oxides in the zinc slag, realize the recycling of zinc materials in a green and efficient manner, and save the production cost of hot-dip galvanized iron rods.

[0006] To achieve the above object, the first aspect of the present utility model proposes a hierarchical electromagnetic smelting device, which is characterized in that: it includes a recovery furnace shell, a heat preservation layer and a secondary liquid filter; a heat dissipation fan is arranged inside the recovery furnace shell; the heat preservation layer is arranged inside the recovery furnace shell and is connected to the recovery furnace shell at the upper end; a zinc liquid discharge channel is arranged at the bottom left of the heat preservation layer, a lead liquid discharge channel and an air discharge channel are arranged at the bottom right, a nitrogen input channel is arranged at the top left, a temperature sensor is arranged at the top right inside, A-level coils, B-level coils and C-level coils are respectively wound around the outside from top to bottom, and a motor is arranged at the center position of the bottom outside; the secondary liquid filter is arranged inside the heat preservation layer, and a stirring device is arranged at the center of the bottom; the stirring device is connected to the motor, and a rotation speed sensor is arranged on the stirring device; a balancer is arranged at the top of the secondary liquid filter, and a primary zinc material recovery basket is arranged inside the secondary liquid filter; the upper end of the primary zinc material recovery basket is connected to the recovery furnace shell, and a feeding port is arranged at the top of the primary zinc material recovery basket.

[0007] Preferably, a heat dissipation partition is arranged between the heat dissipation fan and the A-level coils, the B-level coils and the C-level coils.

[0008] Preferably, the material of the primary zinc material recovery basket is stainless steel, and the material of the heat preservation layer is quartz.

[0009] Preferably, the winding pitch between single turns of the A-level coils is greater than the winding pitch between single turns of the B-level coils and greater than the winding pitch between single turns of the C-level coils; the winding pitch between single turns of the C-level coils is greater than the winding pitch between single turns of the B-level coils.

[0010] The other aspect of the present utility model proposes a zinc recovery method based on the hierarchical electromagnetic smelting device, which is characterized in that: it includes the following steps:

[0011] Step 1: Put zinc materials into the feeding port, monitor the input amount of zinc materials, and stop feeding when the volume of the zinc materials occupies 2 / 3 of the volume of the primary zinc material recovery basket;

[0012] Step 2: Open the air discharge channel and the nitrogen input channel, and introduce nitrogen;

[0013] Step 3: Monitor the gas state in the air discharge channel, and close the air discharge channel when nitrogen is detected;

[0014] Step 4: Turn on the cooling fan;

[0015] Step 5: Pass cooling water into the internal cooling water circulation passages of the A - level coil, the B - level coil, and the C - level coil;

[0016] Step 6: Pass current through the A - level coil and the B - level coil to start heating, and the temperature sensor starts to record the temperature;

[0017] Step 7: Start the stirring device;

[0018] Step 8: The rotational speed sensor monitors and records the rotational speed of the stirring device;

[0019] Step 9: Pass medium - frequency and low - power current through the C - level coil;

[0020] Step 10: Separate the lead liquid;

[0021] Step 11: Adjust the working state of the coil;

[0022] Step 12: Continue to heat the C - level coil;

[0023] Step 13: Separate the zinc liquid;

[0024] Step 14: Stop heating the A - level coil, the B - level coil, and the C - level coil, and stop the internal cooling water circulation of the coil;

[0025] Step 15: Stop the stirring device, stop the cooling fan from working, and record the curve of the change of the stirring device with time during the smelting process.

[0026] Preferably, in Step 6, when the A - level coil and the B - level coil pass current to start heating and the temperature sensor starts to record the temperature, it specifically includes:

[0027] Monitor the volume specification of the input zinc material and judge the power supply situation of the A - level coil and the B - level coil;

[0028] When the volume of a single piece of zinc material is greater than or equal to 1 / 12 of the first - level zinc material recycling basket, the system determines it as a refractory zinc material at this time. The A - level coil passes high - frequency and medium - power current, and the B - level coil passes medium - frequency and high - power current;

[0029] When the volume of a single piece of zinc material is less than 1 / 12 of the first - level zinc material recycling basket, the system determines it as a non - refractory zinc material at this time. The A - level coil passes medium - frequency and medium - power current, and the B - level coil passes medium - frequency and high - power current.

[0030] Preferably, in Step 10, the separation of the lead liquid specifically includes:

[0031] 101. The temperature sensor records the temperature of the zinc material. When the temperature reaches the temperature control line of 300 °C, the current input to each level of the coil changes, and the hierarchical electromagnetic smelting device enters the heat preservation stage. The A-level coil is input with medium-frequency and low-power current, and the B-level coil is input with medium-frequency and low-power current;

[0032] 102. The rotation speed sensor monitors the rotation speed of the stirring device. The rotation speed of the stirring device decreases with the heating time. When the rotation speed of the stirring device no longer decreases, the lead liquid discharge channel is opened to discharge the separated lead liquid;

[0033] 103. The rotation speed sensor monitors the rotation speed of the stirring device. The rotation speed of the stirring device increases with the heating time. When the rotation speed of the stirring device no longer increases, at this time, the lead liquid has been completely discharged, and the lead liquid discharge channel is closed.

[0034] Preferably, in step 11, the adjustment of the coil working state specifically includes:

[0035] After the lead liquid is discharged, it is determined whether the A-level coil continues to work according to the zinc material limit height. When the zinc material limit height is greater than 1 / 3 of the first-level zinc material recovery basket, the A-level coil is input with medium-frequency and low-power current, and the B-level coil is input with medium-frequency and medium-power current;

[0036] When the zinc material limit height is less than or equal to 1 / 3 of the first-level zinc material recovery basket, the A-level coil stops working, and the B-level coil is input with medium-frequency and medium-power current.

[0037] Preferably, in step 13, the zinc liquid separation specifically includes:

[0038] 131. The temperature sensor records the temperature of the zinc material. When the temperature reaches the temperature control line of 400 °C, the current input to each level of the coil changes, and the hierarchical electromagnetic smelting device enters the heat preservation stage. The working state of the A-level coil remains consistent with the result determined in step 11, and the B-level coil is input with medium-frequency and low-power current;

[0039] 132. The rotation speed sensor monitors the rotation speed of the stirring device. When the rotation speed of the stirring device no longer decreases, the zinc liquid discharge channel is opened;

[0040] 133. The rotation speed sensor monitors the rotation speed of the stirring device. When the rotation speed of the stirring device no longer increases, at this time, the zinc liquid has been completely discharged, and the zinc liquid discharge channel is closed.

[0041] Preferably, the heating area corresponding to the A-level coil is the solid zinc material dispersion area, the heating area corresponding to the B-level coil is the solid zinc material concentration area, and the heating area corresponding to the C-level coil is the metal liquid area.

[0042] The present utility model provides a hierarchical electromagnetic smelting device and a zinc recovery method based on the smelting device, and the beneficial effects are as follows:

[0043] 1. In the device relied on by the present utility model, there are three levels of coils A, B, and C with different single-turn coil spacings. The single-turn coil spacing of the A-level coil is greater than that of the C-level coil, and the C-level coil is greater than that of the B-level coil. The heating area corresponding to the A-level coil is the solid zinc material dispersion area, the heating area corresponding to the B-level coil is the solid zinc material concentration area, and the heating area corresponding to the C-level coil is the molten metal area. Such a setting can effectively perform hierarchical heating and heat preservation for the characteristics of solid zinc materials and liquid metals respectively, improving the smelting and recovery efficiency; the hierarchical electromagnetic heating method proposed by the present utility model has two heating modes for refractory zinc materials and non-refractory zinc materials, and can adapt to the smelting of zinc materials with different volumes by adjusting the current power and frequency of the three levels of coils A, B, and C, with stronger adaptability and smelting efficiency.

[0044] 2. Since it is difficult to measure the temperature of the molten metal, the present utility model combines the temperature control line and the rotation speed of the stirring device to judge the melting state of the molten metal, and then separates the lead liquid and the zinc liquid in the first heating stage and the second heating stage. When the temperature is maintained at the melting points of lead and zinc metals, the amount of molten metal increases and the rotation speed of the stirring device decreases. When the metal in this heating and separation stage is fully melted, the rotation speed of the stirring device no longer decreases, so as to fully melt the lead and zinc in the zinc material and improve the recovery efficiency.

[0045] 3. The method proposed by the present utility model uses 300°C and 400°C as the temperature control lines for the first heating stage and the second heating stage respectively. The temperature control lines are slightly lower than the melting points of the metals recovered in this heating stage. After the temperature sensor detects that the temperature of the smelting device reaches the temperature control line, the working state of the coil is changed to enter the molten metal heat preservation stage, greatly reducing the temperature rise rate, which can effectively prevent the vaporization of metallic lead caused by too fast temperature rise, reduce heavy metal pollution, and reduce power consumption.

[0046] 4. In the method proposed by the present utility model, nitrogen is introduced before the smelting device heats to protect the induction heating process of the zinc material, which can prevent the secondary oxidation of the separated zinc liquid during the heating process; in the setting of the air discharge channel and the nitrogen input channel in the device relied on by the present utility model, the position of the nitrogen input channel is higher than that of the air discharge channel. This is because the density of nitrogen is less than that of air, and the nitrogen will be located above the device after being input. Such a setting helps nitrogen to fill the inside of the heat preservation layer, effectively preventing the secondary oxidation of the separated zinc liquid during the heating of the zinc material. Description of the Drawings

[0047] Figure 1 is the electromagnetic smelting furnace for zinc and iron relied on by the present utility model;

[0048] Figure 2It is a schematic diagram of the zinc recovery method of the present utility model;

[0049] Figure 3 It is a graph of the rotational speed change of the stirring device in the initial heating stage of the present utility model;

[0050] Figure 4 It is a heating state diagram in the initial heating stage of the present utility model;

[0051] Figure 5 It is a graph of the rotational speed change of the stirring device when the metallic lead is completely melted in the present utility model;

[0052] Figure 6 It is a heating state diagram when the metallic lead is completely melted in the present utility model;

[0053] Figure 7 It is a graph of the rotational speed change of the stirring device when the metallic lead is completely separated in the present utility model;

[0054] Figure 8 It is a heating state diagram when the metallic lead is completely separated in the present utility model;

[0055] Figure 9 It is a graph of the rotational speed change of the stirring device when the metallic zinc is completely melted in the present utility model;

[0056] Figure 10 It is a heating state diagram when the metallic zinc is completely melted in the present utility model;

[0057] Figure 11 It is a graph of the rotational speed change of the stirring device when the metallic zinc is completely separated in the present utility model;

[0058] Figure 12 It is a heating state diagram when the metallic zinc is completely separated in the present utility model.

[0059] Among them, 1. Zinc liquid discharge channel, 2. C-level coil, 3. B-level coil, 4. Cooling fan, 5. A-level coil, 6. Nitrogen input channel, 7. Recovery furnace shell, 8. Heat dissipation partition, 9. Thermal insulation layer, 10. Balancer, 11. Feeding port, 12. Zinc slag, 13. Air discharge channel, 14. Lead liquid discharge channel, 15. Primary zinc material recovery basket, 16. Stirring device, 17. Motor, 18. Rotational speed sensor, 19. Secondary liquid filter screen, 20. Temperature sensor, 21. Metal liquid, ①. Solid zinc material dispersion area, ②. Solid zinc material concentration area, ③. Metal liquid area. Detailed implementation mode

[0060] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the technical solutions in the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings in the embodiments of the present utility model. However, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0061] In the description of the present utility model, it should be noted that the terms "Grade A", "Grade B", "Grade C", "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. Embodiment 1

[0062] As Figure 1 shown, a hierarchical electromagnetic smelting device includes a zinc liquid discharge channel 1, a Grade C coil 2, a Grade B coil 3, a cooling fan 4, a Grade A coil 5, a nitrogen input channel 6, a recovery furnace shell 7, a heat dissipation partition 8, a heat preservation layer 9, a balancer 10, a feeding port 11, zinc slag 12, an air discharge channel 13, a lead liquid discharge channel 14, a primary zinc material recovery basket 15, a stirring device 16, a motor 17, a rotational speed sensor 18, a secondary liquid filter screen 19, and a temperature sensor 20; the cooling fan 4 is arranged inside the recovery furnace shell 7, and the heat dissipation partition 8 is arranged between the cooling fan 4, the Grade A coil 5, the Grade B coil 3, and the Grade C coil 2; the heat preservation layer 9 is arranged inside the recovery furnace shell 7 and is connected to the recovery furnace shell 7 at the upper end; the zinc liquid discharge channel 1 is arranged at the bottom left of the heat preservation layer 9, the lead liquid discharge channel 14 and the air discharge channel 13 are arranged at the bottom right, the nitrogen input channel 6 is arranged at the top left, the temperature sensor 20 is arranged at the top right inside, and the Grade A coil 5, the Grade B coil 3, and the Grade C coil 2 are respectively wound around the outside from top to bottom; the motor 17 is arranged at the center position on the outside of the bottom of the heat preservation layer 9; the secondary liquid filter screen 19 is arranged inside the heat preservation layer 9, the stirring device 16 is arranged at the center of the bottom, and the stirring device 16 is connected to the motor 17; the rotational speed sensor 18 is arranged on the stirring device 16; the balancer 10 is arranged at the top of the secondary liquid filter screen 19, and the primary zinc material recovery basket 15 is arranged inside; the upper end of the primary zinc material recovery basket 15 is connected to the recovery furnace shell 7; the feeding port 11 is arranged at the top of the primary zinc material recovery basket 15; in this embodiment, the material of the primary zinc material recovery basket 15 is stainless steel, and the material of the heat preservation layer 9 is quartz; the winding pitch between single turns of the Grade A coil 5 is 6 times that between single turns of the Grade B coil 3, and the winding pitch between single turns of the Grade C coil 2 is 4 times that between single turns of the Grade B coil 3; the heating area corresponding to the Grade A coil 5 is the solid zinc material dispersion area ①, the heating area corresponding to the Grade B coil 3 is the solid zinc material concentration area ②, and the heating area corresponding to the Grade C coil 2 is the metal liquid area ③. Example 2

[0063] In this example, refractory zinc is taken as an example to illustrate the specific process of the zinc recovery method of the present utility model. As Figure 2 shown, it includes the following steps:

[0064] Step 1: Put zinc materials into the feeding port 11, monitor the input amount of zinc materials, and stop feeding when the volume of zinc materials occupies 2 / 3 of the volume of the first-stage zinc material recovery basket 15;

[0065] Step 2: Open the air discharge channel 13 and the nitrogen input channel 6, and introduce nitrogen;

[0066] Step 3: Monitor the gas state in the air discharge channel 13, and close the air discharge channel 13 when nitrogen is detected;

[0067] Step 4: Turn on the cooling fan 4;

[0068] Step 5: Introduce cooling water into the internal cooling water circulation passages of the A-level coil 5, the B-level coil 3, and the C-level coil 2;

[0069] Step 6: Monitor the volume specifications of the input zinc materials. If it is found that the volume of a single piece of zinc material is greater than or equal to 1 / 12 of the first-stage zinc material recovery basket 15, at this time, the system determines that the zinc materials in the first-stage zinc material recovery basket 15 are refractory zinc materials. The A-level coil 5 corresponding to the solid zinc material dispersion area ① of the heating area is passed through a high-frequency and medium-power current, and the B-level coil 3 corresponding to the solid zinc material concentration area ② of the heating area is passed through a medium-frequency and high-power current to start heating. The high-frequency current is concentrated on the surface of the zinc materials, and the medium-frequency current can deeply heat the inside of the zinc materials, adapting to the distribution state of the solid zinc materials in the first-stage zinc material recovery basket 15. The temperature sensor 20 starts to record the temperature;

[0070] Step 7: Start the stirring device 16;

[0071] Step 8: The rotation speed sensor 18 monitors and records the rotation speed of the stirring device 16. At this time, the state of the zinc materials and the rotation speed of the stirring device 16 are as Figure 3 、 4 shown;

[0072] Step 9: The C-level coil 2 corresponds to the metal liquid area ③ of the heating area. The metal liquid has reached the melting point and only needs to be kept warm in the first heating stage. A medium-frequency and low-power current is passed through the C-level coil 2;

[0073] Step 10: Separate the lead liquid;

[0074] 101. The temperature sensor 20 records the temperature of the zinc material. To avoid the vaporization of metallic lead, when the temperature reaches the temperature control line of 300 °C, the hierarchical electromagnetic smelting device enters the heat preservation stage and starts to heat slowly. The current input to each level of coil changes. The A-level coil 5 is input with medium-frequency and low-power current, and the B-level coil 3 is input with medium-frequency and low-power current;

[0075] 102. During the lead liquid melting stage, the rotation speed sensor 18 monitors the rotation speed of the stirring device 16. At this time, the state of the zinc material and the rotation speed of the stirring device 16 are as Figure 5 、 6 shown. The rotation speed of the stirring device 16 decreases with the heating time. When the metallic lead is fully melted, the rotation speed of the stirring device 16 no longer decreases, and the lead liquid discharge channel 14 is opened to discharge the separated lead liquid;

[0076] 103. The rotation speed sensor 18 monitors the rotation speed of the stirring device 16. At this time, the state of the zinc material and the rotation speed of the stirring device 16 are as Figure 7 、 8 shown. As the lead liquid is discharged, the rotation speed of the stirring device 16 increases. When the rotation speed of the stirring device 16 no longer increases, the lead liquid has been completely discharged, and the lead liquid discharge channel 14 is closed.

[0077] Step 11: Adjust the working state of the coil;

[0078] After the lead liquid is discharged, it is determined whether the A-level coil 5 continues to work according to the limit height of the zinc material. When the limit height of the zinc material is greater than 1 / 3 of the first-level zinc material recovery basket 15, the A-level coil 5 is input with medium-frequency and low-power current, and the B-level coil 3 is input with medium-frequency and medium-power current.

[0079] Step 12: The C-level coil 2 continues to heat;

[0080] Step 13: Separate the zinc liquid;

[0081] 131. The temperature sensor 20 records the temperature of the zinc material. When the temperature reaches the temperature control line of 400 °C, the current input to each level of coil changes, and the hierarchical electromagnetic smelting device enters the heat preservation stage. The A-level coil 5 continues to heat with medium-frequency and low-power current, and the B-level coil 3 is input with medium-frequency and low-power current;

[0082] 132. The rotation speed sensor 18 monitors the rotation speed of the stirring device 16. At this time, the state of the zinc material and the rotation speed of the stirring device 16 are as Figure 9 、 10 shown. The rotation speed of the stirring device 16 decreases as the metallic zinc melts. When the rotation speed of the stirring device 16 no longer decreases, the metallic zinc is fully melted, and the zinc liquid discharge channel 1 is opened;

[0083] 133. The rotational speed sensor 18 monitors the rotational speed of the stirring device 16. At this time, the state of the zinc material and the rotational speed of the stirring device 16 are as Figure 11 , 12 shown. The rotational speed of the stirring device 16 increases as the zinc liquid is discharged. When the rotational speed of the stirring device 16 no longer increases, the zinc liquid has been completely discharged, and the zinc liquid discharge channel 1 is closed.

[0084] Step 14: After the recovery of metallic lead and metallic zinc is completed and the heating is ended, the A-level coil 5, the B-level coil 3, and the C-level coil 2 stop heating, and the internal cooling water circulation of the coils stops;

[0085] Step 15: The stirring device 16 stops, the cooling fan 4 stops working, and the curve of the change of the stirring device 16 over time during the smelting process is recorded.

[0086] In this article, specific examples are used to elaborate on the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation mode and application scope.

Claims

1. A hierarchical electromagnetic smelting device, characterized in that: It includes a recovery furnace shell (7), a heat insulation layer (9), and a secondary liquid filter screen (19); a cooling fan (4) is provided inside the recovery furnace shell (7); the heat insulation layer (9) is arranged inside the recovery furnace shell (7) and is connected to the recovery furnace shell (7) at the upper end; a zinc liquid discharge channel (1) is provided at the bottom left of the heat insulation layer (9), a lead liquid discharge channel (14) and an air discharge channel (13) are provided at the bottom right, a nitrogen input channel (6) is provided at the top left, a temperature sensor (20) is provided at the top right inside, an A-level coil (5), a B-level coil (3), and a C-level coil (2) are wound around it from top to bottom respectively on the outside, and a motor (17) is provided at the center position on the outside of the bottom; the secondary liquid filter screen (19) is arranged inside the heat insulation layer (9), and a stirring device (16) is provided at the center of the bottom; the stirring device (16) is connected to the motor (17), and a rotational speed sensor (18) is arranged on the stirring device (16); a balancer (10) is provided at the top of the secondary liquid filter screen (19), and a primary zinc material recovery basket (15) is arranged inside the secondary liquid filter screen (19); the upper end of the primary zinc material recovery basket (15) is connected to the recovery furnace shell (7), and a feed inlet (11) is provided at the top of the primary zinc material recovery basket (15).

2. The hierarchical electromagnetic melting device according to claim 1, characterized in that: A heat dissipation partition plate (8) is provided between the cooling fan (4) and the A-level coil (5), B-level coil (3), and C-level coil (2).

3. The hierarchical electromagnetic smelting device according to claim 1, characterized in that: The material of the primary zinc material recovery basket (15) is stainless steel, and the material of the heat insulation layer (9) is quartz.

4. A hierarchical electromagnetic smelting device according to claim 1, characterized in that: The winding pitch between single turns of the A-level coil (5) is greater than the winding pitch between single turns of the B-level coil (3) and greater than the winding pitch between single turns of the C-level coil (2); the winding pitch between single turns of the C-level coil (2) is greater than the winding pitch between single turns of the B-level coil (3).

Images