Zinc dross grading screening system and method

Abstract

The invention relates to the technical field of zinc dross screening, in particular to a zinc dross grading screening method which comprises a transfer device, a primary vibrating screen and a directional distributing machine. The transfer device conveys zinc dross to the first-stage vibrating screen, the first-stage vibrating screen is connected with a directional distributing machine, and the directional distributing machine is respectively connected with a common zinc dross screening system and an antimony-copper-zinc dross screening system. The invention further relates to a zinc dross grading screening method. The zinc dross grading screening method comprises the following steps of (1) dross transferring, (2) primary screening, (3) distribution in different directions and (4) common zinc dross treatment. And 5, treating zinc dross containing antimony and copper. The common zinc dross and the antimony-copper-containing zinc dross are conveyed to different screening systems, so that the common zinc dross and the antimony-copper-containing zinc dross are separated and screened, the screened zinc dross is conveniently classified and recycled, meanwhile, the applicability and flexibility of the whole production line are remarkably improved, and subsequent processing is facilitated.

Description

Technical Field

[0001] This invention relates to the field of zinc dross screening technology, and in particular to a zinc dross grading and screening system and method. Background Technology

[0002] In the zinc smelting process, the treatment of zinc dross is a crucial step affecting metal recovery efficiency and product quality. For a long time, the industry has generally used a mixed screening method to treat dross, which involves mixing dross containing different components such as copper and antimony, then screening and remelting them to obtain zinc ingots. However, since copper and antimony are harmful impurities in conventional hot-dip galvanizing alloys, the resulting zinc ingots cannot be used in conventional alloy production lines, resulting in resource waste. Simultaneously, with the continued decline in market demand for antimony-containing zinc products, the original treatment method has led to a severe imbalance between the internal production and sales of zinc granules and bulk materials, making continued use of mixed screening insufficient to meet actual production and sales needs.

[0003] Furthermore, the existing screening system is inadequate for material classification. Therefore, it is urgent to upgrade the existing scum treatment system to enable material classification and screening, thereby improving overall production efficiency and system reliability. Summary of the Invention

[0004] To address the problem of existing screening systems' inability to effectively classify and process materials, this invention provides a zinc dross grading and screening system and method. Ordinary zinc dross and zinc dross containing antimony and copper are conveyed via a separating conveyor to separate screening systems for ordinary zinc dross and antimony-copper zinc dross, respectively. This achieves separate screening of ordinary zinc dross and antimony-copper zinc dross, avoiding contamination of ordinary zinc dross by the antimony-copper zinc dross during the original mixed screening process. It also facilitates the classification and recycling of the screened zinc dross, significantly improving the applicability and flexibility of the overall production line and facilitating subsequent processing. Furthermore, it effectively reduces waste caused by material contamination, ensuring production efficiency while lowering subsequent processing costs.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A zinc dross grading and screening system includes a transfer device, a primary vibrating screen, and a directional feeding machine; the transfer device transports zinc dross to the feed end of the primary vibrating screen, the discharge end of the primary vibrating screen is connected to the directional feeding machine, and the discharge end of the directional feeding machine is respectively connected to a conventional zinc dross screening system and an antimony-copper-zinc dross screening system.

[0007] Furthermore, the directional material distribution machine includes a housing, a transmission frame, and a vibration device. The transmission frame is fixed inside the housing, with both ends passing through the housing and suspended in the air. The two suspended ends of the transmission frame have material outlet one and material outlet two, respectively. Material outlet one connects to a common zinc slag screening system, and material outlet two connects to an antimony-copper-zinc slag screening system. An inlet for conveying material into the transmission frame is located at the top of the housing. A vibration device is installed between the housing and the transmission frame to assist in the movement of material on the transmission frame. The directional material distribution machine transmits the material after primary screening to different screening systems, ensuring a material classification and screening scheme with system backups. It allows for rapid switching during emergency shutdowns of one system, ensuring production continuity and stability, and improving overall production efficiency and system reliability.

[0008] Furthermore, the ordinary zinc dross screening system includes a secondary vibrating screen, a scraper conveyor, and a Raymond mill. The feed end of the secondary vibrating screen is connected to the material outlet of the distributor; the discharge end of the undersize material from the secondary vibrating screen is connected to the feed end of the scraper conveyor, and the discharge end of the scraper conveyor is connected to the feed end of the Raymond mill. By setting up the ordinary zinc dross screening system, both large and small zinc particles after screening can be directly used in conventional alloy production without additional processing, ensuring the purity and usability of the zinc product in alloy production.

[0009] Furthermore, the ordinary zinc slag screening system also includes a ball mill and a three-stage vibrating screen. The discharge end of the secondary vibrating screen is connected to the feed end of the ball mill, the discharge end of the ball mill is connected to the feed end of the tertiary vibrating screen, and the discharge end of the tertiary vibrating screen is connected to a scraper conveyor. This three-stage screening system facilitates the grinding of large zinc particles to remove the outer layer of zinc oxide ash using the ball mill, while simultaneously collecting the mixture of small zinc particles and zinc oxide ash for reuse in a Raymond mill. This improves resource utilization efficiency.

[0010] Furthermore, the dust collection port of Raymond mill one is connected to the feed end of cyclone dust collector one, the discharge end of cyclone dust collector one is connected to the feed end of scraper conveyor two, and the discharge end of scraper conveyor two is connected to the raw material room. Through the installation of the cyclone dust collector and scraper conveyor two, the screened zinc oxide ash is transported to the raw material room for reuse, improving resource utilization.

[0011] Furthermore, the antimony-copper-zinc slag screening system includes a secondary vibrating screen, a silo, a vibrating feeder, and a Raymond mill. The feed end of the secondary vibrating screen is connected to the material outlet of the distributor, and the discharge end of the undersize material from the secondary vibrating screen is connected to the silo. The silo is connected to the feed end of the vibrating feeder, and the discharge end of the vibrating feeder is connected to the feed end of the Raymond mill. A cyclone dust collector is connected to the dust collection port of the Raymond mill, and the discharge end of the cyclone dust collector is connected to the feed end of a screw conveyor. The feed end of the screw conveyor is connected to the discharge end of a scraper conveyor. By setting up the antimony-copper-zinc slag screening system, ordinary zinc slag and antimony-copper-containing zinc slag are screened separately, avoiding contamination of ordinary zinc slag by antimony-copper-containing zinc slag. This facilitates the classification and recycling of the screened zinc slag, allowing ordinary zinc slag to be directly used in conventional alloy production, while reducing subsequent processing costs.

[0012] Furthermore, the discharge end of the primary vibrating screen is connected to a large block bin, and an alloy furnace for melting the material in the large block bin is installed on the side of the large block bin; the primary vibrating screen is also connected to an outdoor dust collector, which is connected to a scraper conveyor. The installation of the outdoor dust collector allows the zinc oxide ash in the dust to be reused, improving resource utilization.

[0013] A method for classifying and screening zinc dross, based on the aforementioned zinc dross classification and screening system, includes the following steps:

[0014] Step 1: Dross transfer. The zinc dross raw material is transferred to the feed end of the primary vibrating screen using a transfer device.

[0015] Step 2: Primary screening. The primary vibrating screen performs preliminary screening of zinc dross. The material on the screen is large pieces of dross, which are directly transported to the large piece silo for temporary storage; the material under the screen is transported to the directional spreading machine.

[0016] Step 3: Directional feeding. When processing ordinary zinc dross, the directional feeding machine transports the ordinary zinc dross to the ordinary zinc dross screening system. When processing zinc dross containing antimony and copper, the directional feeding machine transports the zinc dross containing antimony and copper to the antimony-copper-zinc dross screening system.

[0017] Step 4: Ordinary zinc dross treatment. The directional feeding machine transports the ordinary dross to the secondary vibrating screen one for ordinary zinc dross treatment. The oversize material after screening by the secondary vibrating screen one is temporarily stored in ton bags. The undersize material after screening by the secondary vibrating screen one is transported to Raymond mill one by scraper conveyor one. The small zinc particles ground by Raymond mill one are temporarily stored in ton bags. The zinc oxide ash after grinding is treated by cyclone dust collector one and then transported to the raw material room for recycling by scraper conveyor two.

[0018] Step 5: Treatment of zinc slag containing antimony and copper. The distributor conveys the zinc slag containing antimony and copper to the second-stage vibrating screen of the antimony-copper-zinc slag treatment system. The oversize material after screening by the second-stage vibrating screen is temporarily stored in ton bags. The undersize material, small zinc particles, is temporarily stored in a silo. The small zinc particles in the silo are then conveyed to the second Raymond mill via a vibrating feeder. The small zinc particles after grinding by the second Raymond mill are temporarily stored in ton bags. The zinc oxide ash after grinding is treated by the second cyclone dust collector and then conveyed to the second scraper conveyor via a screw conveyor.

[0019] Furthermore, in step 4, the oversize material after screening by the secondary vibrating screen is large zinc particles. The large zinc particles are ground by a ball mill and then screened by the tertiary vibrating screen. The oversize material after screening is temporarily stored in ton bags, while the undersize material, small particles and zinc oxide ash, is conveyed to the scraper conveyor.

[0020] Furthermore, in step 2, the large slag from the bulk silo is transported to the alloy furnace for smelting, and the dust generated by the primary vibration is treated by an outdoor dust collector and then transported to the raw material room via scraper conveyor II.

[0021] The beneficial effects of the present invention through the above technical solution are:

[0022] This invention utilizes a zinc dross screening system and method to separate ordinary zinc dross and zinc dross containing antimony and copper into separate screening systems via a separating feeder. This achieves separate screening of ordinary zinc dross and antimony-copper zinc dross, avoiding contamination of ordinary zinc dross by the antimony-copper zinc dross during the original mixed screening process. It also facilitates the classification and recycling of the screened zinc dross, significantly improving the applicability and flexibility of the overall production line and facilitating subsequent processing. Furthermore, it effectively reduces waste and production interruptions caused by material contamination, ensuring production efficiency while lowering subsequent processing costs and environmental burden.

[0023] This invention utilizes a zinc slag screening system and method to separate ordinary zinc slag and zinc slag containing antimony and copper into large slag pieces (particle size > 10 mm), large zinc particles (10 mm > particle size > 5 mm), small zinc particles (particle size ≤ 5 mm), and zinc oxide ash. This facilitates subsequent classification and production of different alloy products based on particle size, while also enabling the recycling of zinc oxide ash and other materials, thereby improving resource utilization and preventing resource waste. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a zinc slag grading and screening system and method according to the present invention.

[0025] Figure 2 This is one of the structural schematic diagrams of the directional feeding machine in the zinc slag grading and screening system and method of the present invention.

[0026] Figure 3 This is the second schematic diagram of the directional feeding machine of the zinc slag grading and screening system and method of the present invention.

[0027] Figure 4 This invention relates to a zinc slag grading and screening system and method, specifically a directional feeding machine. Figure 2 Top view.

[0028] The attached diagram is labeled as follows: 1. Transfer device, 2. Primary vibrating screen, 3. Outdoor dust collector, 4. Large block silo, 5. Alloy furnace, 6. Directional material distributor, 7. Secondary vibrating screen I, 8. Scraper conveyor I, 9. Raymond mill I, 10. Ton bag, 11. Ball mill, 12. Tertiary vibrating screen, 13. Cyclone dust collector I, 14. Scraper conveyor II, 15. Raw material storage room, 16. Secondary vibrating screen II, 17. Silo, 18. Vibrating feeder, 19. Raymond mill II, 20. Cyclone dust collector II, 21. Screw conveyor, 22. Common vibrating motor, 23. Feed inlet, 24. Transfer frame, 25. Material outlet I, 26. Shell, 27. Vibrating motor I, 28. Material outlet II, 29. Vibrating motor II. Detailed Implementation

[0029] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0030] like Figures 1-4 As shown, a zinc dross grading and screening system includes a transfer device 1, a primary vibrating screen 2, and a directional feeding machine 6. The transfer device 1 includes a dross hopper trolley, a traveling crane, and a rail transport vehicle. The traveling crane lifts the dross hopper trolley loaded with zinc dross to the rail transport vehicle, which then travels along a preset track to the feeding end of the primary vibrating screen 2. In this embodiment, the primary vibrating screen 2 is an existing linear vibrating screen with a vibration frequency of 2800 r / min and a screen mesh size of 10 mm. The discharge end of the oversize material from the primary vibrating screen 2 is connected to a large block bin 4, and an alloy furnace 5 is located on the side of the large block bin 4. The material in the large block bin 4 is manually transported to the alloy furnace 5 for smelting. The discharge end of the undersize material from the primary vibrating screen 2 is connected to the directional feeding machine 6.

[0031] The directional material distribution machine 6 includes a housing 26, a transmission frame 24, and a vibration device. The transmission frame 24 is fixed inside the housing 26, and its two ends pass through the housing 26 and are suspended in the air. Material outlet 1 25 and material outlet 28 are respectively opened at both ends of the transmission frame 24. Material outlet 1 25 is connected to a common zinc slag screening system, and material outlet 28 is connected to an antimony-copper-zinc slag screening system. A feed inlet 23 for conveying material into the transmission frame 24 is opened at the upper part of the housing 26. The feed inlet 23 is connected to the undersize discharge end of the primary vibrating screen 2. A vibration device for assisting the movement of material on the transmission frame 24 is provided between the housing 26 and the transmission frame 24. The vibration device includes a vibration motor 1 27, a vibration motor 29, and a common vibration motor 22. Vibration motor 1 27 and vibration motor 29 are respectively fixed to the inner sidewalls of both sides of the housing 26, and the common vibration motor 22 is fixed to the bottom of the housing 26. When the material distribution machine 6 is working, the vibrating motor 27 and the common vibrating motor 22 vibrate the transmission frame 24, causing the material on the transmission frame 24 to move towards the material outlet 25, thus transferring the material to the ordinary zinc slag screening system; the vibrating motor 29 and the common vibrating motor 22 vibrate the transmission frame 24, causing the material on the transmission frame 24 to move towards the material outlet 29, thus transferring the material to the antimony-copper-zinc slag screening system. In this embodiment, the vibrating motor 27, the vibrating motor 29, and the common vibrating motor 22 are all existing vibrating motors used on vibrating screens or vibrating transmission machines.

[0032] The ordinary zinc dross treatment system includes a secondary vibrating screen 7, a scraper conveyor 8, and a Raymond mill 9. The feed end of the secondary vibrating screen 7 is connected to the material outlet 25 of the distributor 6. The discharge end of the undersize material of the secondary vibrating screen 7 is connected to the feed end of the scraper conveyor 8, and the discharge end of the scraper conveyor 8 is connected to the feed end of the Raymond mill 9. The dust collection port of the Raymond mill 9 is connected to the feed end of the cyclone dust collector 13, and the discharge end of the cyclone dust collector 13 is connected to the feed end of the scraper conveyor 14. The discharge end of the scraper conveyor 14 is connected to the raw material storage area 15. The discharge end of the secondary vibrating screen 7 is connected to the feed end of the ball mill 11. The discharge end of the ball mill 11 is connected to the tertiary vibrating screen 12. The oversize material of the tertiary vibrating screen 12 is temporarily stored in ton bags 10. The discharge end of the undersize material of the tertiary vibrating screen 12 is connected to the scraper conveyor 8.

[0033] The antimony-copper-zinc slag screening system includes a secondary vibrating screen 16, a silo 17, a vibrating feeder 18, and a Raymond mill 19. The feed end of the secondary vibrating screen 16 is connected to the material outlet 28 of the distributor 6. The oversize material from the secondary vibrating screen 16 is temporarily stored in ton bags 10. The undersize material from the secondary vibrating screen 16 is connected to the silo 17. The silo 17 is connected to the vibrating feeder 18 (feeding capacity 1-5t / h). The discharge end of the vibrating feeder 18 is connected to the Raymond mill 19. The vibrating feeder 18 transfers the material in the silo 17 to the Raymond mill 19. The dust collection port of the Raymond mill 19 is connected to a cyclone dust collector 20. The discharge end of the cyclone dust collector 20 is connected to the feed end of a screw conveyor 21. The discharge end of the screw conveyor 21 is connected to a scraper conveyor 14.

[0034] In order to maximize the collection of materials and prevent dust from polluting the working environment after screening, an outdoor dust collector 3 is also connected to the primary vibrating screen 2, and the outdoor dust collector 3 is connected to the scraper conveyor 14.

[0035] In this embodiment, the primary vibrating screen 2, the secondary vibrating screen 7, the secondary vibrating screen 16, and the tertiary vibrating screen 12 are all linear vibrating screens. The screen mesh size of the primary vibrating screen 2 is 10 mm, and the screen mesh size diameter of the secondary vibrating screen 7, the secondary vibrating screen 16, and the tertiary vibrating screen 12 is 5 mm.

[0036] A method for classifying and screening zinc slag includes the following steps:

[0037] Step 1: Slag Transfer; The operator loads the zinc slag into the slag hopper trolley, and uses a single-beam crane to lift the slag hopper trolley to the rail transport vehicle. The rail transport vehicle runs along the preset track to the feeding end of the first-stage vibrating screen 2, and transports the zinc slag to the first-stage vibrating screen 2, completing the fixed-point transfer of raw materials.

[0038] Step 2: Primary screening; Start the primary vibrating screen 2. The oversize material after screening by the primary vibrating screen 2 is large slag with a particle size >10mm, which is temporarily stored in the large slag bin 4. In this embodiment, the large slag in the large slag bin 4 is transferred to the alloy furnace 5 for smelting. The undersize material with a particle size ≤10mm enters the directional material distribution machine 6. The dust generated by the primary vibration is treated by the outdoor dust collector 3 and then transported to the scraper conveyor 14 and then to the raw material room 15 for recycling.

[0039] Step 3: Directional feeding; When processing ordinary zinc dross, the directional feeding machine 6 transports the ordinary zinc dross to the ordinary zinc dross screening system. When processing zinc dross containing antimony and copper, the directional feeding machine 6 transports the zinc dross containing antimony and copper to the antimony-copper-zinc dross screening system.

[0040] Step 4: Ordinary zinc dross treatment. The distributor 6 transports the ordinary zinc dross after primary screening to the secondary vibrating screen 7 of the ordinary zinc dross screening system. The undersize material after screening by the secondary vibrating screen 7 is a mixture of small zinc particles (≤5mm in diameter) and zinc oxide ash. The undersize material is then conveyed to Raymond mill 9 via scraper conveyor 8. Raymond mill 9 grinds and removes the zinc oxide ash from the surface of the small zinc particles. The ground small zinc particles are temporarily stored in ton bags 10. The zinc oxide ash ground by Raymond mill 9 is then conveyed to cyclone dust collector 13 to separate the particulate matter in the dust from the zinc oxide ash. The separated zinc oxide ash is then conveyed to raw material room 15 via scraper conveyor 14 for recycling. The oversize material after screening by the secondary vibrating screen 17 consists of large zinc particles with a diameter >5mm. These large zinc particles are then transferred to the ball mill 11 for grinding to remove the surface zinc oxide ash. The ground material is then transferred to the tertiary vibrating screen 12 for screening. The oversize material after screening, with a diameter >5mm, is temporarily stored in a ton bag 10. The undersize material consists of small zinc particles with a diameter ≤5mm and a mixture of zinc oxide ash. The undersize material is then conveyed to the scraper conveyor 18.

[0041] Step 5: Treatment of zinc slag containing antimony and copper. The feeder 6 transports the zinc slag containing antimony and copper to the secondary vibrating screen 16 of the antimony-copper-zinc slag treatment system. The oversize material after screening by the secondary vibrating screen 16, with a particle size > 5mm, is temporarily stored in ton bags 10. The undersize material after screening, small zinc particles with a particle size ≤ 5mm, and zinc oxide ash, are transported to the silo 17 for temporary storage. The small zinc particles and zinc oxide ash in the silo 17 are transported to Raymond mill 19 by vibrating feeder 18. The small zinc particles after grinding by Raymond mill 19 are temporarily stored in ton bags 10. The ground zinc oxide ash is treated by cyclone dust collector 20 and then transported to scraper conveyor 14 by screw conveyor 21. The scraper conveyor 14 then transports the material to the raw material room 15 for reprocessing.

[0042] In this embodiment, large slag particles in bulk bin 4 are transported to alloy furnace 5 for remelting. Ordinary zinc slag, after screening, is temporarily stored in ton bags 10, and the large and small zinc particles are respectively transported to different zinc alloy production lines. Antimony-copper-containing zinc slag, after screening, has its large and small zinc particles respectively transported to different alloy production lines. Screened zinc oxide ash is transported to raw material room 15 via scraper conveyor 14 for recycling.

[0043] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention.

Claims

1. A zinc dross fractionating screening system, characterized by, It includes a transfer device (1), a primary vibrating screen (2), and a directional material distributor (6); the transfer device (1) transports zinc dross to the feed end of the primary vibrating screen (2), the discharge end of the primary vibrating screen (2) is connected to the directional material distributor (6), and the discharge end of the directional material distributor (6) is connected to a common zinc dross screening system and an antimony-copper-zinc dross screening system respectively.

2. A zinc dross fractionation system according to claim 1, wherein, The directional material distribution machine (6) includes a housing (26), a transmission frame (24), and a vibration device. The transmission frame (24) is fixed inside the housing (26), and both ends of the transmission frame (24) pass through the housing (26) and are suspended in the air. The two suspended ends of the transmission frame (24) are respectively provided with material outlet one (25) and material outlet two (28), wherein material outlet one (25) is connected to the ordinary zinc slag screening system, and material outlet two (28) is connected to the antimony copper zinc slag screening system. The upper part of the housing (26) is provided with a feed inlet (23) for conveying materials into the transmission frame (24), and a vibration device for assisting the materials on the transmission frame (24) is provided between the housing (26) and the transmission frame (24).

3. A zinc dross fractionation system according to claim 1, wherein, The ordinary zinc slag screening system includes a secondary vibrating screen (7), a scraper conveyor (8), and a Raymond mill (9). The feed end of the secondary vibrating screen (7) is connected to the material outlet (25) of the distributor (6). The undersize discharge end of the secondary vibrating screen (7) is connected to the feed end of the scraper conveyor (8), and the discharge end of the scraper conveyor (8) is connected to the feed end of the Raymond mill (9).

4. A zinc dross fractionation system according to claim 3, wherein, The ordinary zinc slag screening system also includes a ball mill (11) and a three-stage vibrating screen (12). The discharge end of the oversize material of the two-stage vibrating screen is connected to the feed end of the ball mill (11), the discharge end of the ball mill (11) is connected to the feed end of the three-stage vibrating screen (12), and the discharge end of the undersize material of the three-stage vibrating screen (12) is connected to the scraper conveyor (8).

5. A zinc dross fractionation system according to claim 3, wherein, The dust collection port of the Raymond mill (9) is connected to the feed end of the cyclone dust collector (13), the discharge end of the cyclone dust collector (13) is connected to the feed end of the scraper conveyor (14), and the discharge end of the scraper conveyor (14) is connected to the raw material room (15).

6. A zinc dross fractional classification system according to claim 1, wherein, The antimony-copper-zinc slag screening system includes a secondary vibrating screen (16), a silo (17), a vibrating feeder (18), and a Raymond mill (19). The feed end of the secondary vibrating screen (16) is connected to the material outlet (28) of the directional material distributor (6). The undersize discharge end of the secondary vibrating screen (16) is connected to the silo (17). The silo (17) is connected to the feed end of the vibrating feeder (18). The discharge end of the vibrating feeder (18) is connected to the feed end of the Raymond mill (19). The dust collection port of the Raymond mill (19) is connected to a cyclone dust collector (20). The discharge end of the cyclone dust collector (20) is connected to the feed end of the screw conveyor (21). The feed end of the screw conveyor (21) is connected to the discharge end of the scraper conveyor (14).

7. A zinc dross fractional classification system according to claim 1, wherein, The discharge end of the primary vibrating screen (2) is connected to a large block bin (4), and an alloy furnace (5) is provided on the side of the large block bin (4) to smelt the material in the large block bin (4); the primary vibrating screen (2) is also connected to an outdoor dust collector (3), which is connected to the scraper conveyor (14).

8. A method of classifying zinc dross characterized by, A zinc slag grading and screening system according to any one of claims 1 to 7 includes the following steps: Step 1: Floating dross transfer. The zinc floating dross raw material is transferred to the feed end of the primary vibrating screen (2) through the transfer device (1); Step 2: Primary screening. The primary vibrating screen (2) performs preliminary screening of zinc dross. The material on the screen is large dross, which is directly transported to the large dross bin (4) for temporary storage; the material under the screen is transported to the directional spreading machine (6). Step 3: Directional feeding. When processing ordinary zinc dross, the directional feeding machine (6) transports the ordinary zinc dross to the ordinary zinc dross screening system. When processing zinc dross containing antimony and copper, the directional feeding machine (6) transports the zinc dross containing antimony and copper to the antimony-copper-zinc dross screening system. Step 4: Ordinary zinc dross treatment. The feeder (6) transports the ordinary dross to the secondary vibrating screen (7) for ordinary zinc dross treatment. The oversize material after screening by the secondary vibrating screen (7) is temporarily stored in a ton bag (10). The undersize material after screening by the secondary vibrating screen (7) is transported to Raymond mill (9) by scraper conveyor (8). The small zinc particles after grinding by Raymond mill (9) are temporarily stored in a ton bag (10). The zinc oxide ash after grinding is treated by cyclone dust collector (1) and then transported to the raw material room (15) by scraper conveyor (2) for reprocessing. Step 5: Treatment of zinc slag containing antimony and copper. The feeder (6) transports the zinc slag containing antimony and copper to the second-stage vibrating screen (16) of the antimony-copper-zinc slag treatment system. The oversize material after screening by the second-stage vibrating screen (16) is temporarily stored in a ton bag (10). The undersize material after screening is transported to the silo (17) for temporary storage. The small zinc particles in the silo (17) are transported to the Raymond mill (19) by the vibrating feeder (18). The small zinc particles after grinding by the Raymond mill (19) are temporarily stored in a ton bag (10). The zinc oxide ash after grinding is processed by the cyclone dust collector (20) and then transported to the scraper conveyor (14) by the screw conveyor (21).

9. A method of classifying zinc dross according to claim 8, characterized in that, In step 4, the oversize material after screening by the secondary vibrating screen (7) is large zinc particles. After being ground by the ball mill (11), the large zinc particles are screened by the tertiary vibrating screen (12). The oversize material after screening is temporarily stored in a ton bag (10), and the undersize material, zinc oxide ash, is conveyed to the scraper conveyor (8).

10. A method of classifying zinc dross according to claim 8, characterized in that, In step 2, the large slag in the large block bin (4) is transported to the alloy furnace (5) for smelting. The dust generated by the first-stage vibration is treated by the outdoor dust collector (3) and then transported to the scraper conveyor (14) and then to the raw material room (15).

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