A lead-zinc smelting slag crushing device

Abstract

The utility model discloses a kind of lead-zinc smelting slag's crushing device including feed hopper, device body, feed hopper is set in the top of device body, device body is connected with control cabinet electricity telecommunication;The device body further include ash removal device, roller crusher, screening device, cone crusher, processing mechanism, ash removal device is respectively set in the top of roller crusher and cone crusher, screening device is set in the lower of roller crusher, cone crusher is set in the right side of screening device, processing mechanism is set in the lower of screening device and cone crusher.The function of the utility model is to prevent harmful substances in smoke dust in crushing process from spreading to the environment, causing pollution to the surrounding environment;Dust in slag before crushing is screened out, reducing the accumulation of ash slag in crushing treatment step, ash slag is carried down by spraying water, to prevent the effect of accumulated ash slag on crushing material;Prevent qualified material from being excessively crushed, ensure that the effect of crushing is uniform.

Description

Technical Field

[0001] This utility model belongs to the field of crushing device technology, and in particular relates to a crushing device for lead-zinc smelting slag. Background Technology

[0002] In lead-zinc ore production, the composition of smelting slag is complex, mainly consisting of unreacted ore, flux, and metal oxides. It contains certain amounts of heavy metals such as lead, zinc, and copper, and may also contain harmful elements such as arsenic and cadmium. If these harmful components are not properly treated, they will pose a serious threat to the environment and human health. This smelting slag can be crushed and remelted to extract recyclable metals.

[0003] A prior art device for crushing lead-zinc smelting slag, disclosed in Chinese Patent (CN218924774U), includes a crushing box with a horizontal partition on its outer side. A motor is mounted on the partition, and the output of the motor can transmit power to a fine crusher via a chain. A fixed jaw plate is installed on the inner wall of the crushing box, and a movable jaw plate is installed on the opposite side of the fixed jaw plate. Side guard plates are provided between the fixed and movable jaw plates. The movable jaw plate is mounted on a frame. A circular mounting hole is formed at the upper end of the frame, and an eccentric shaft is installed in the mounting hole. The eccentric shaft passes horizontally through the frame, and a pulley is installed on the end face of the eccentric shaft. The pulley is driven by an external motor via a belt. An arc-shaped hook is formed at the lower end of the frame, and the arc-shaped hook is connected to a limit rod. A buffer spring is installed on the other side of the limit rod, and an adjustment block is provided on the top of the buffer spring. The adjustment block is connected to the frame via a thrust plate.

[0004] This method has the following drawbacks: First, this device generates a large amount of smoke and dust when crushing smelting slag. The harmful metal elements contained in this smoke and dust diffuse into the air, polluting the surrounding environment. At the same time, the recyclable components in this smoke and dust cannot be recovered, resulting in resource waste. Second, after primary crushing, smelting slag produces a large amount of ash and slag, which falls into the secondary crushing device along with the crushed material. This ash and slag mixed with the material reduces the crushing effect and efficiency of the secondary crushing device. Third, there is no screening device after primary crushing to separate qualified and unqualified materials. Some qualified materials are crushed into smaller sizes during the secondary crushing process, making it difficult to control the crushing effect.

[0005] Therefore, this paper provides a crushing device for lead-zinc smelting slag. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model discloses a crushing device for lead-zinc smelting slag, which prevents harmful substances in the dust during the crushing process from spreading into the environment and causing pollution to the surrounding environment; it screens out the dust in the slag before crushing to reduce the accumulation of ash and slag in the crushing process, and carries the ash and slag downwards by spraying water to prevent the accumulated ash and slag from affecting the crushing effect; it prevents qualified materials from being over-crushed and ensures uniform crushing effect.

[0007] To achieve the above-mentioned technical effects, this utility model provides a crushing device for lead-zinc smelting slag, including a feed hopper and a device body. The feed hopper is located above the device body, and the device body is electrically connected to a control cabinet. The device body also includes a dust removal device, a roller crusher, a screening device, a cone crusher, and a processing mechanism. The dust removal device is located above the roller crusher and the cone crusher, respectively. The screening device is located below the roller crusher, the cone crusher is located to the right of the screening device, and the processing mechanism is located below the screening device and the cone crusher.

[0008] Preferably, the dust removal device further includes a pretreatment device, a spray pipe a, and a spray pipe b. The pretreatment device is located below the feed hopper, the spray pipe a is located on the side of the feed inlet above the roller crusher, and the spray pipe b is located on the side of the feed inlet above the cone crusher.

[0009] Preferably, the pretreatment device further includes a dust removal box, an air box, an induced draft fan, a bag filter, and a recovery box a. The dust removal box is located below the feed hopper, and the lower outlet of the dust removal box is connected to the upper feed inlet of the roller crusher. The air box is located on the rear side of the dust removal box, and the induced draft fan is located on the rear side of the air box. The air inlet of the induced draft fan is connected to the rear side of the air box through a pipe. The bag filter is located on the rear side of the induced draft fan, and the inlet on the front side of the bag filter is connected to the upper outlet of the induced draft fan through a pipe. The recovery box a is located below the bag filter.

[0010] Preferably, the dust removal box further includes a box body, a dust removal roller, a drive motor, a transmission wheel set, and a gear set. The dust removal roller is disposed inside the box body, and the front and rear sides of the dust removal roller are slidably connected to the box body. The transmission wheel sets are disposed on the front side of the dust removal roller, and the gear set is disposed on the front side of the transmission wheel set. One end of the transmission wheel set is coaxially connected to the dust removal roller, and the other end of the transmission wheel set is coaxially connected to the gear set. The drive motor is disposed on the front side of the gear set.

[0011] Preferably, the cleaning roller further includes a cylinder body, ash screening holes, and baffles. An opening connected to a ventilation box is provided on the rear side of the cylinder body, the ash screening holes are provided on the side and front side of the cylinder body, and the baffles are respectively provided between the ash screening holes on the side of the cylinder body.

[0012] Preferably, the processing mechanism further includes a conveyor belt device a, a conveyor belt device b, a recycling bin b, an air duct, an air inlet hopper, and an air supply pipe. The conveyor belt device a is inclined to the right and located below the screening device. The conveyor belt device b is inclined to the left and located below the right side of the conveyor belt device a. The recycling bin b is located to the left of the connection between the conveyor belt device a and the conveyor belt device b. The air duct is located above the conveyor belt device b. The air inlet hopper is located to the right of the air duct. The air supply pipe is located to the right of the air inlet hopper. The other end of the air supply pipe is connected to the outlet above the bag filter.

[0013] Preferably, a scraper is inclinedly arranged on the lower right side of the conveyor belt device a, with the upper end of the scraper in contact with the conveyor belt of the conveyor belt device a, and the lower end of the scraper positioned above the recycling bin b.

[0014] Preferably, an air outlet is provided on the left side of the air duct, and the air outlet is located on the right side of the scraper. An air supply outlet is also provided at the connection between the right side of the air duct and the air supply outlet.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The device is equipped with a dust removal system to prevent harmful substances in the fumes from spreading into the environment during the crushing process and causing pollution to the surrounding environment. The pretreatment device in the dust removal system screens out the dust in the slag before crushing, reducing the accumulation of ash and slag in the crushing process. The ash and slag are carried out downward by spray water to prevent the accumulated ash and slag from affecting the crushing effect. A roller crusher, screening device, and cone crusher are set up to screen out the unqualified materials after primary crushing, preventing qualified materials from being over-crushed and ensuring uniform crushing effect. Attached Figure Description

[0017] Figure 1 This is a front view of the present invention;

[0018] Figure 2 This is the left view of this utility model;

[0019] Figure 3 yes Figure 2 A sectional view of section a.

[0020] Figure 4 yes Figure 3 A partial schematic diagram of b in the middle;

[0021] Figure 5 yes Figure 3 A partial schematic diagram of c in the middle;

[0022] Figure 6 This is an isometric view of the present invention;

[0023] Figure 7 yes Figure 6A partial schematic diagram of d in the middle;

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Feed hopper; 2. Roller crusher; 3. Screening device; 4. Cone crusher; 5. Spray pipe a; 6. Spray pipe b; 7. Dust removal box; 8. Air box; 9. Exhaust fan; 10. Bag filter; 11. Recovery box a; 12. Box body; 13. Drive motor; 14. Transmission wheel set; 15. Gear set; 16. Cylinder; 17. Screen hole; 18. Baffle; 19. Conveyor belt device a; 20. Conveyor belt device b; 21. Recovery box b; 22. Air duct; 23. Air inlet hopper; 24. Air supply pipe; 25. Scraper; 26. Air outlet. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] The prior art in this embodiment has the following problems: The inventors have found the following defects in the prior art: First, this device generates a large amount of smoke and dust when crushing smelting slag. The harmful metal elements contained in this smoke and dust diffuse into the air, causing pollution to the surrounding environment. At the same time, the recyclable components in this smoke and dust cannot be recovered, resulting in resource waste. Second, after primary crushing, smelting slag generates a large amount of ash and slag, which falls into the secondary crushing device along with the crushed material. The mixing of this ash and slag with the material reduces the crushing effect and efficiency of the secondary crushing device. Third, no screening device is set after primary crushing to separate qualified and unqualified materials. Some qualified materials are crushed into smaller sizes during the secondary crushing process, making it difficult to control the crushing effect. Example 1

[0028] like Figures 1 to 7 As shown:

[0029] Therefore, the inventor provides a crushing device for lead-zinc smelting slag, including a feed hopper 1 and a device body. The feed hopper 1 is located above the device body, and the device body is electrically connected to the control cabinet (not shown in the figure). The device body also includes a dust removal device, a roller crusher 2, a screening device 3, a cone crusher 4, and a processing mechanism. The dust removal device is located above the roller crusher 2 and the cone crusher 4, respectively. The screening device 3 is located below the roller crusher 2, and the cone crusher 4 is located to the right of the screening device 3. The processing mechanism is located below the screening device 3 and the cone crusher 4.

[0030] Using the above scheme, the slag from lead-zinc ore smelting is placed into the feed hopper 1. The slag enters the dust removal device from the hopper to remove dust, and then falls downward into the roller crusher 2 for primary crushing. The dust generated during the crushing process is reduced by the water mist sprayed by the dust removal device. The screening device 3 is set below the roller crusher to receive the material after primary crushing. The unqualified material is screened to the inlet of the cone crusher 4 for secondary crushing. The unqualified material is crushed and discharged downward. By setting up the screening device 3 to screen out the unqualified material, the qualified material is prevented from being over-crushed, ensuring uniform crushing effect. Then, the qualified material and the material containing crushing dust are discharged from the bottom of the roller crusher 2 and the cone crusher 4 to the processing mechanism. At the processing mechanism, the wastewater containing crushing dust is separated from the material, and the material is dried and then sent out. Example 2

[0031] like Figures 1 to 7 As shown:

[0032] Furthermore, the dust removal device also includes a pretreatment device, a spray pipe a5, and a spray pipe b6. The pretreatment device is located below the feed hopper 1, the spray pipe a5 is located on the side of the feed inlet above the roller crusher 2, and the spray pipe b6 is located on the side of the feed inlet above the cone crusher 4.

[0033] Furthermore, the pretreatment device also includes a dust removal box 7, an air box 8, an induced draft fan 9, a bag filter 10, and a recovery box a11. The dust removal box 7 is located below the feed hopper 1, and the lower outlet of the dust removal box 7 is connected to the feed inlet above the roller crusher 2. The air box 8 is located behind the dust removal box 7, and the induced draft fan 9 is located behind the air box 8. The air inlet 26 of the induced draft fan 9 is connected to the rear side of the air box 8 through a pipe. The bag filter 10 is located behind the induced draft fan 9, and the inlet on the front side of the bag filter 10 is connected to the outlet above the induced draft fan 9 through a pipe. The recovery box a11 is located below the bag filter 10.

[0034] Furthermore, the dust removal box 7 also includes a box body 12, a dust removal roller, a drive motor 13, a transmission wheel set 14, and a gear set 15. The dust removal roller is disposed inside the box body 12, and the front and rear sides of the dust removal roller are slidably connected to the box body 12, respectively. The transmission wheel set 14 is disposed on the front side of the dust removal roller, and the gear set 15 is disposed on the front side of the transmission wheel set 14. One end of the transmission wheel set 14 is coaxially connected to the dust removal roller, and the other side of the transmission wheel set 14 is coaxially connected to the gear set 15. The drive motor 13 is disposed on the front side of the gear set 15.

[0035] Furthermore, the dust removal roller also includes a cylinder body 16, a ash screen hole 17, and a baffle 18. An opening connected to a ventilation box 8 is provided on the rear side of the cylinder body 16. The ash screen hole 17 is provided on the side and front side of the cylinder body 16. The baffle 18 is respectively provided between the ash screen holes on the side of the cylinder body 16.

[0036] In this process, the slag produced after lead-zinc ore smelting is fed from the hopper into the ash removal box 7. The drive motor 13 drives the ash removal roller to rotate outward through the gear set 15 and the transmission wheel set 14. The baffle 18 disperses the slag that falls to the middle and pushes it down to the sides. During the process, the ash removal roller rotates on the box body 12. The induced draft fan 9 continuously draws air into the ash removal roller through the air box 8. The air enters through the ash screen hole 17 on the front side of the ash removal roller. The dust in the slag is drawn into the cylinder 16 through the ash screen hole 17 on the side of the ash removal roller. Under the negative pressure, it is drawn into the air box 8 and then enters the bag filter 10 after passing through the induced draft fan 9. After being captured by the bag filter 10, it is discharged downward into the recycling bin. In box a11, the dust in the slag before crushing is pretreated to reduce the dust generated during the crushing process. At the same time, the spray pipe a5 above the roller crusher 2 and the spray pipe b6 above the cone crusher 4 are connected to the spray water pipe. During the crushing process, water mist is sprayed downward through atomizing nozzles to bring down the dust generated during the crushing process. This prevents harmful substances in the dust from spreading into the environment and causing pollution to the surrounding environment, and also reduces the accumulation of ash and slag in the crushing process. The ash and slag are carried downward by the spray water to prevent the accumulated ash and slag from affecting the crushing effect. Example 3

[0037] like Figures 1 to 7 As shown:

[0038] Furthermore, the processing mechanism also includes a conveyor belt device a19, a conveyor belt device b20, a recycling bin b21, an air duct 22, an air inlet hopper 23, and an air supply pipe 24. The conveyor belt device a19 is inclined to the right and located below the screening device 3. The conveyor belt device b20 is inclined to the left and located below the right side of the conveyor belt device a19. The recycling bin b21 is located to the left of the connection between the conveyor belt device a19 and the conveyor belt device b20. The air duct 22 is located above the conveyor belt device b20. The air inlet hopper 23 is located to the right of the air duct 22. The air supply pipe 24 is located to the right of the air inlet hopper 23. The other end of the air supply pipe 24 is connected to the outlet above the bag filter dust collector 10.

[0039] Furthermore, a scraper 25 is inclinedly arranged on the lower right side of the conveyor belt device a19. The upper end of the scraper 25 is in contact with the conveyor belt of the conveyor belt device a19, and the lower end of the scraper 25 is arranged above the recycling bin b21.

[0040] Furthermore, an air outlet 26 is provided on the left side of the air duct 22, and the air outlet 26 is located on the right side of the scraper 25. An air outlet (not shown in the figure) is provided at the connection between the right side of the air duct 22 and the air outlet.

[0041] The material undergoes primary crushing by roller crusher 2, screening by screening device 3, and secondary crushing by cone roller crusher. The qualified material and dust-laden wastewater are discharged downwards above conveyor belt device a19. Conveyor belt device a19 slowly transports the material and dust-laden wastewater to the right above conveyor belt device b20. During this process, due to the rightward inclination of conveyor belt device a19, the wastewater naturally flows to the right during transport. After the material falls above conveyor belt device b20, the wastewater is guided by scraper 25 into the lower recovery box b21. Part of the wastewater falls to the left end of conveyor belt device b20. Due to the leftward inclination of conveyor belt device b20, some of the wastewater falling onto conveyor belt device b20 flows to the left into recovery box b21. After settling, the wastewater in recovery box b21 can be separated into wastewater and dust residue. Reusing the material, it is conveyed to the right above the conveyor belt device b20. During the process, the air supply pipe 24 delivers the air from the exhaust port 26 above the bag dust collector 10 to the air inlet hopper 23. After being diverted by the air supply port on the right side of the air duct 22, it enters the air duct 22 evenly to the left. Inside the air duct 22, the material above the conveyor belt device b20 is blown dry, and then blown out to the left through the air outlet 26. The air outlet 26 is located on the side of the scraper 25. The air force can provide a leftward thrust to the wastewater falling on the conveyor belt device a19, so that as much wastewater as possible falls to the left along the scraper 25 and into the recycling box, preventing too much wastewater from falling on the conveyor belt device b20 and reducing the difficulty of drying the material. In this way, the wastewater generated by the spray dust removal is recycled and reused, reducing dust pollution and improving resource utilization.

[0042] In summary, the device is equipped with a dust removal system to prevent harmful substances in the fumes during the crushing process from spreading into the environment and causing pollution. The pretreatment device in the dust removal system screens out the dust in the slag before crushing, reducing the accumulation of ash and slag in the crushing process. The ash and slag are carried out downward by spray water to prevent the accumulated ash and slag from affecting the crushing effect. The device is equipped with a roller crusher 2, a screening device 3, and a cone crusher 4 to screen out the unqualified materials after primary crushing, preventing qualified materials from being over-crushed and ensuring uniform crushing effect.

[0043] The working principle of this utility model:

[0044] The slag produced after lead-zinc ore smelting is fed from the hopper into the ash removal box 7. The drive motor 13 drives the ash removal roller to rotate outward through the gear set 15 and the transmission wheel set 14. The baffle 18 disperses the slag that falls to the middle to both sides. During the process, the ash removal roller rotates on the box body 12. The induced draft fan 9 continuously draws air out of the ash removal roller through the air box 8. The air enters from the ash screen hole 17 on the front side of the ash removal roller. The dust in the slag is drawn into the cylinder 16 through the ash screen hole 17 on the side of the ash removal roller. Under the negative pressure, it is drawn into the air box 8. After passing through the induced draft fan 9, it enters the bag filter dust collector 10 and is captured by the bag filter dust collector 10 and discharged downward into the recovery box a11. This completes the pretreatment of the dust in the slag before crushing and reduces the dust generated during the crushing process.

[0045] The material then falls into the roller crusher 2 for primary crushing. The dust generated during the crushing process is reduced by the water mist sprayed from the spray pipe a5. The screening device 3, located below the roller crusher, receives the material after primary crushing. The vibrating motor drives the screen plate to screen on the spring base, crushing the unqualified material and discharging it downward through the screen holes. The unqualified material is screened out by the screening device 3 and sent to the inlet of the cone crusher 4 for secondary crushing. The dust generated during the crushing process is reduced by the water mist sprayed from the spray pipe b6 to prevent qualified material from being over-crushed and to ensure uniform crushing effect.

[0046] Qualified materials and dust-laden wastewater are discharged downwards into the area above conveyor belt device a19. Conveyor belt device a19 slowly transports the materials and dust-laden wastewater to the right above conveyor belt device b20. During this process, due to the rightward tilt of conveyor belt device a19, the wastewater naturally flows to the right during transport. After the materials fall downwards above conveyor belt device b20, the wastewater is guided by scraper 25 into the lower recycling bin b21. Part of the wastewater falls to the left end of conveyor belt device b20. Due to the leftward tilt of conveyor belt device b20, some of the wastewater falling onto conveyor belt device b20 flows to the left into recycling bin b21. After settling, the wastewater in recycling bin b21 can be separated to recover wastewater and dust for reuse. The materials flow upwards from the top of conveyor belt device b20... During the right conveying process, the air supply pipe 24 delivers the air from the exhaust port 26 above the bag dust collector 10 to the air inlet hopper 23. After being diverted by the air supply port on the right side of the air duct 22, the air evenly enters the air duct 22 to the left. Inside the air duct 22, the air blows the material above the conveyor belt device b20, drying the moisture on the surface of the material. Then, the material is blown out to the left through the air outlet 26. The air outlet 26 is located on the side of the scraper 25. The air force can provide a leftward thrust to the wastewater falling on the conveyor belt device a19, so that as much wastewater as possible falls to the left along the scraper 25 into the recycling box, preventing too much wastewater from falling onto the conveyor belt device b20 and reducing the difficulty of drying the material. In this way, the wastewater generated by the spray dust removal is recycled and reused, reducing dust pollution and improving resource utilization.

[0047] This concludes the description of the working principle of the device.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crushing device for lead-zinc smelting slag, comprising a feed hopper (1) and a device body, wherein the feed hopper (1) is disposed above the device body, and the device body is electrically connected to a control cabinet, characterized in that: The device body also includes a dust removal device, a roller crusher (2), a screening device (3), a cone crusher (4), and a processing mechanism. The dust removal device is respectively located above the roller crusher (2) and the cone crusher (4), the screening device (3) is located below the roller crusher (2), the cone crusher (4) is located to the right of the screening device (3), and the processing mechanism is located below the screening device (3) and the cone crusher (4).

2. The crushing device for lead-zinc smelting slag according to claim 1, characterized in that: The dust removal device also includes a pretreatment device, a spray pipe a (5), and a spray pipe b (6). The pretreatment device is located below the feed hopper (1), the spray pipe a (5) is located on the side of the feed inlet above the roller crusher (2), and the spray pipe b (6) is located on the side of the feed inlet above the cone crusher (4).

3. The crushing device for lead-zinc smelting slag according to claim 2, characterized in that: The pretreatment device also includes a dust removal box (7), a wind box (8), an induced draft fan (9), a bag filter (10), and a recovery box a (11). The dust removal box (7) is located below the feed hopper (1). The discharge port of the dust removal box (7) is connected to the feed port above the roller crusher (2). The wind box (8) is located behind the dust removal box (7). The induced draft fan (9) is located behind the wind box (8). The air inlet (26) of the induced draft fan (9) is connected to the rear side of the wind box (8) through a pipe. The bag filter (10) is located behind the induced draft fan (9). The inlet of the front side of the bag filter (10) is connected to the outlet above the induced draft fan (9) through a pipe. The recovery box a (11) is located below the bag filter (10).

4. The crushing device for lead-zinc smelting slag according to claim 3, characterized in that: The cleaning box (7) further includes a box body (12), a cleaning roller, a drive motor (13), a transmission wheel set (14), and a gear set (15). The cleaning roller is located inside the box body (12), and the front and rear sides of the cleaning roller are slidably connected to the box body (12). The transmission wheel set (14) is located on the front side of the cleaning roller, and the gear set (15) is located on the front side of the transmission wheel set (14). One end of the transmission wheel set (14) is coaxially connected to the cleaning roller, and the other side of the transmission wheel set (14) is coaxially connected to the gear set (15). The drive motor (13) is located on the front side of the gear set (15).

5. The crushing device for lead-zinc smelting slag according to claim 4, characterized in that: The cleaning roller also includes a cylinder (16), a ash-screening hole (17), and a baffle (18). An opening connected to a ventilation box (8) is provided on the rear side of the cylinder (16). The ash-screening hole (17) is located on the side and front side of the cylinder (16). The baffle (18) is located between the ash-screening holes on the side of the cylinder (16).

6. The crushing device for lead-zinc smelting slag according to claim 1, characterized in that: The processing mechanism also includes a conveyor belt device a (19), a conveyor belt device b (20), a recycling bin b (21), an air duct (22), an air inlet hopper (23), and an air supply pipe (24). The conveyor belt device a (19) is tilted to the right and located below the screening device (3). The conveyor belt device b (20) is tilted to the left and located below the right side of the conveyor belt device a (19). The recycling bin b (21) is located to the left of the connection between the conveyor belt device a (19) and the conveyor belt device b (20). The air duct (22) is located above the conveyor belt device b (20). The air inlet hopper (23) is located to the right of the air duct (22). The air supply pipe (24) is located to the right of the air inlet hopper (23). The other end of the air supply pipe (24) is connected to the outlet above the bag filter (10).

7. The crushing device for lead-zinc smelting slag according to claim 6, characterized in that: A scraper (25) is inclinedly arranged on the lower right side of the conveyor belt device a (19). The upper end of the scraper (25) is in contact with the conveyor belt of the conveyor belt device a (19), and the lower end of the scraper (25) is arranged above the recycling bin b (21).

8. The crushing device for lead-zinc smelting slag according to claim 6, characterized in that: An air outlet (26) is provided on the left side of the air duct (22), and the air outlet (26) is located on the right side of the scraper (25). An air outlet is provided at the connection between the right side of the air duct (22) and the air outlet.

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