A ball milling equipment for lead-zinc ore dressing production

Abstract

The invention relates to the field of ball milling equipment, and discloses a lead-zinc ore beneficiation production ball milling equipment, comprising a bottom plate and a ball milling barrel, first mounting plates are fastened with bolts on both left and right sides of the bottom plate, a ball milling barrel is arranged between the two first mounting plates, a feed pipe is connected to the left end of the ball milling barrel, the feed pipe rotates and passes through the first mounting plate on the left side, a discharge pipe is connected to the right end of the ball milling barrel, the discharge pipe rotates and passes through the first mounting plate on the right side, a driving structure is arranged on the bottom plate, when the driving structure drives the ball milling barrel to rotate to bring up steel balls, the steel balls can be automatically grabbed in the ball milling barrel through the driving structure, and when the steel balls are brought up to the highest height as the ball milling barrel rotates, the steel balls are released to ball mill the materials, thereby greatly increasing the height of the steel balls brought up, thereby increasing the impact force of the steel balls on the materials, and improving the work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of ball milling equipment, in particular to a ball milling equipment for lead-zinc ore dressing production. Background Art

[0002] The ball mill is a key equipment for crushing materials after they are broken. This type of mill is a mill that has a certain number of steel balls as grinding media in its cylinder. Ball mill equipment is used in lead and zinc ore beneficiation production.

[0003] The ball mill in the prior art can quantitatively put materials into the device through the material-splitting assembly, so that the device can fully grind the materials entering the device, making the materials in the device grind more evenly and finely, and can effectively improve the production progress and increase the practicality of the device under the premise of ensuring the quality;

[0004] The ball mill equipment in the prior art drives the steel balls to rise by the rotating ball mill body, and grinds the materials in the ball mill body by the falling of the steel balls. Since the mass of the steel balls is constant, the force with which the steel balls hit the materials in the ball mill body is determined by the height to which the steel balls rise. However, in the prior art, a liner is provided to increase the rising height of the steel balls driven by the ball mill body. However, the steel balls still rise to the highest height in the ball mill body. Therefore, the rising height of the steel balls, the force with which the steel balls hit the materials, and the working efficiency need to be improved. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a ball milling equipment for lead-zinc ore dressing production.

[0006] The lead-zinc ore beneficiation production ball mill provided by the present invention adopts the following technical scheme:

[0007] A lead-zinc ore beneficiation production ball milling equipment, comprising a bottom plate and a ball milling cylinder, first mounting plates are fastened with bolts on both left and right sides of the bottom plate, a ball milling cylinder is arranged between the two first mounting plates, a feed pipe is connected to the left end of the ball milling cylinder, the feed pipe rotates through the first mounting plate on the left, a discharge pipe is connected to the right end of the ball milling cylinder, the discharge pipe rotates through the first mounting plate on the right, a driving structure is arranged on the bottom plate, a grabbing and releasing structure is arranged in the ball milling cylinder, driving structures are arranged on the two first mounting plates, and a discharge structure is arranged at the right end of the bottom plate;

[0008] The grabbing and releasing structure comprises a plurality of rotating shafts that rotate and pass through the inner wall of the ball mill, and the two rotating shafts of each group are fixedly sleeved with grabbing plates, and the grabbing plates are arc-shaped plates. The inner wall of the ball mill is provided with a receiving groove at a position corresponding to each grabbing plate, and the two grabbing plates of each group are symmetrically arranged with each other;

[0009] The driving structure includes a first gear fixedly mounted on one end of each rotating shaft passing through the ball milling cylinder, a driving frame is provided at the edges of the two end surfaces of the ball milling cylinder corresponding to the position of each group of rotating shafts, a driving strip is installed in the middle of the inner wall of the driving frame, each of the driving strips is located between the two first gears of each group, and teeth meshing with the first gear are provided on both side surfaces of the driving strip, and an insertion rod is connected in the middle of the driving strip, and a driving plate is provided on one side of the two first mounting plates close to the ball milling cylinder, a first arc groove is provided at one edge of the driving plate, and a second arc groove is provided at the other edge of the driving plate, and two connecting grooves are provided on the driving plate, and the two connecting grooves are respectively connected to the first arc groove and the second arc groove, and one end of the insertion rod slides in each groove of the driving plate, and the radius of the first arc groove is smaller than the radius of the second arc groove.

[0010] Preferably, a movable bar is installed in the middle of the driving frame near one side of the ball mill, and the movable bar is slidably arranged in the radial groove on the ball mill. The radial groove is distributed along the radial direction of the ball mill. The driving plate is connected to the first mounting plate through a connecting column, and each of the connecting grooves is in a "Z" shape.

[0011] Preferably, the driving structure includes two second mounting plates installed on the base plate near the two first mounting plates, a motor is installed on one of the second mounting plates, a transmission rod is connected to one end of the motor output shaft, the transmission rod rotates through the two second mounting plates, a second gear is fixedly sleeved on the transmission rod near both ends, a third gear is fixedly sleeved on the ball mill at the position of the second gear, and the second gear is meshingly connected with the third gear.

[0012] Preferably, the material discharge structure includes a receiving hopper arranged on the right side of the ball mill, one end of the discharge pipe is fixedly inserted into the receiving hopper, brackets are installed on both sides of the receiving hopper, the bottom ends of the two brackets are welded to the bottom plate, a dust shielding structure is arranged on the top of the receiving hopper, a material discharge pipe is installed on the bottom end of the receiving hopper, a material dividing structure is arranged on the material discharge pipe, and a screening structure is arranged inside the material discharge pipe.

[0013] Preferably, the material distribution structure includes a distribution port opened above the front and rear sides of the material discharge pipe, and a material discharge frame is installed on the outer side of the material discharge pipe at the position of the distribution port, and the lower inner wall of the material discharge frame is inclined.

[0014] Preferably, the dust shielding structure includes a placement groove opened in the middle of the receiving hopper, an installation frame is placed in the placement groove, a dust shielding net is installed in the installation frame, handles are fixedly passed through the front and rear edges of the installation frame, and magnetic blocks are installed on the two bottom ends of the handles passing through the installation frame, and the magnetic blocks are adsorbed on the lower groove wall of the placement groove.

[0015] Preferably, the screening structure includes grooves opened on the inner walls on the front and rear sides of the discharge pipe, the grooves are located below the material distribution port, and lifting plates are provided in the two grooves. A telescopic rod is connected between the lifting plate and the upper groove wall of the groove, and a spring is sleeved on the telescopic rod. The two ends of the spring are respectively connected to the lifting plate and the upper groove wall of the groove, and a screen plate is installed between the two lifting plates. The screen plate is in an inverted "V" shape, and a lifting structure is provided on the discharge pipe.

[0016] Preferably, the lifting structure includes two side panels arranged close to the inner walls of the front and rear sides of the discharge pipe, the side panels are provided with openings, the two ends of the screen plate pass through the openings, the side panels are blocked at the position of the material distribution port, the side panels are in an "L" shape, the two side panels are respectively connected to the bottom ends of the output shafts of the two electric telescopic rods, the top end of the electric telescopic rods is installed under the discharge frame, and a driving block is installed on the side panel near the lower groove wall at the opening on one side of the groove.

[0017] In summary, the present invention includes the following beneficial technical effects:

[0018] The present invention is provided with a driving structure, a grabbing structure and a driving structure, so that when the driving structure drives the ball mill to rotate to bring up the steel balls, the driving structure can automatically grab the steel balls in the ball mill, and when the steel balls are brought up to the highest height as the ball mill rotates, the steel balls are released to ball mill the materials, thus greatly increasing the height of the steel balls, thereby increasing the impact force of the steel balls on the materials and improving the work efficiency;

[0019] The present invention is provided with a material discharge structure, a dust blocking structure and a material dividing structure, so that the materials after ball milling can be classified and discharged, so that the materials that are not completely ball milled can be re-milled, thereby improving the work quality;

[0020] The present invention is provided with a lifting structure and a screening structure, and the lifting structure is used to drive the screening structure to move up and down, so that the material can be better screened, and the material distribution port can be automatically opened, so that unqualified materials can be automatically screened out and reprocessed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a lead-zinc ore beneficiation production ball milling equipment according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the structure after the driving disk is disassembled in an embodiment of the present invention;

[0023] Figure 3 In the embodiment of the present invention Figure 2 A magnified view of the structure at A;

[0024] Figure 4 It is a schematic diagram of the structure of the driving disk in an embodiment of the present invention;

[0025] Figure 5 Schematic diagram of the structure inside the ball mill in an embodiment of the present invention;

[0026] Figure 6 In the embodiment of the present invention Figure 5 A magnified view of the structure at B;

[0027] Figure 7 It is a structural schematic diagram of a blanking structure in an embodiment of the present invention;

[0028] Figure 8 2 is a schematic diagram of the structure inside the feeding pipe in an embodiment of the present invention;

[0029] Fig. 9 In the embodiment of the present invention Figure 8 Enlarged view of the structure at location C.

[0030] Description of the accompanying drawings: 1, bottom plate; 2, first mounting plate; 3, ball mill; 4, rotating shaft; 5, storage groove; 6, grab plate; 7, feed pipe; 8, discharge pipe; 9, driving frame; 10, moving bar; 11, radial groove; 12, first gear; 13, driving bar; 14, insertion rod; 15, driving plate; 16, first arc groove; 17, second arc groove; 18, connecting groove; 19, second mounting plate; 20, Motor; 21. Transmission rod; 22. Second gear; 23. Third gear; 24. Receiving hopper; 25. Bracket; 26. Discharge pipe; 27. Distributing port; 28. Discharge frame; 29. ​​Mounting frame; 30. Dust screen; 31. Handle; 32. Screen plate; 33. Lifting plate; 34. Telescopic rod; 35. Spring; 36. Electric telescopic rod; 37. Side panel; 38. Opening; 39. Driving block; 40. Groove. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-Figure 9 The present invention is described in further detail.

[0032] The embodiment of the present invention discloses a lead-zinc ore beneficiation production ball milling equipment, comprising a bottom plate 1 and a ball mill 3, first mounting plates 2 are fastened with bolts on both left and right sides of the bottom plate 1, a ball mill 3 is arranged between the two first mounting plates 2, a feed pipe 7 is connected to the left end of the ball mill 3, the feed pipe 7 rotates through the first mounting plate 2 on the left, a discharge pipe 8 is connected to the right end of the ball mill 3, the discharge pipe 8 rotates through the first mounting plate 2 on the right, a driving structure is arranged on the bottom plate 1, a grabbing and releasing structure is arranged in the ball mill 3, a driving structure is arranged on the two first mounting plates 2, and a discharge structure is arranged at the right end of the bottom plate 1;

[0033] The grabbing and releasing structure includes a plurality of rotating shafts 4 that rotate and pass through the inner wall of the ball mill 3. The two rotating shafts 4 of each group are fixedly sleeved with grab plates 6. The grab plates 6 are arc-shaped plates. The inner wall of the ball mill 3 is provided with receiving grooves 5 at positions corresponding to each grab plate 6. The two grab plates 6 of each group are symmetrically arranged with each other.

[0034] The driving structure includes a first gear 12 fixedly sleeved on one end of each rotating shaft 4 passing through the ball mill 3, a driving frame 9 is arranged at the edge of each end surface of the ball mill 3 corresponding to the position of each group of rotating shafts 4, a driving bar 13 is installed in the middle of the inner wall of the driving frame 9, each driving bar 13 is located between the two first gears 12 of each group, and teeth meshing with the first gear 12 are arranged on both side surfaces of the driving bar 13, and a plug rod 14 is connected to the middle of the driving bar 13, and a driving plate 15 is arranged on one side of the two first mounting plates 2 close to the ball mill 3, a first arc groove 16 is opened on one side edge of the driving plate 15, and a second arc groove 17 is opened on the other side edge of the driving plate 15, and two connecting grooves 18 are opened on the driving plate 15, and the two connecting grooves 18 are connected to the first arc groove 16 and the second arc groove 17 respectively, and one end of the plug rod 14 slides in each groove of the driving plate 15, and the groove diameter of the first arc groove 16 is smaller than the groove diameter of the second arc groove 17;

[0035] A moving bar 10 is installed in the middle of one side of the driving frame 9 close to the ball mill 3. The moving bar 10 is slidably arranged in the radial groove 11 on the ball mill 3. The radial groove 11 is distributed along the radial direction of the ball mill 3. The driving plate 15 is connected to the first mounting plate 2 through a connecting column. Each connecting groove 18 is in a "Z" shape.

[0036] The driving structure includes two second mounting plates 19 mounted on the bottom plate 1 near the two first mounting plates 2, one of which is mounted with a motor 20, one end of the output shaft of the motor 20 is connected with a transmission rod 21, the transmission rod 21 rotates and passes through the two second mounting plates 19, a second gear 22 is fixedly sleeved near both ends of the transmission rod 21, a third gear 23 is fixedly sleeved at the position of the second gear 22 on the ball mill 3, the second gear 22 and the third gear 23 are meshed and connected, after the material to be ball milled is added to the ball mill 3 from the feed pipe 7, the motor 20 can be started to drive the transmission rod 21 on the second mounting plate 19 to rotate, and the ball mill 3 is driven to rotate through the second gear 22 and the third gear 23, and when the ball mill 3 rotates, it drives one end of the insertion rod 14 on the driving frame 9 to slide in the connecting groove 18 below to the second arc groove. 17, thereby driving the driving frame 9 to move toward a position away from the axis of the ball mill 3, and automatically driving the two rotating shafts 4 of each group to rotate through the driving bar 13 and the first gear 12, and driving the two grabbing plates 6 of each group to rotate and close, so as to grab some steel balls. In this way, as the ball mill 3 rotates, one end of the insertion rod 14 is driven to slide from the second arc groove 17 to the upper connecting groove 18, and slide to the first arc groove 16. In this process, the driving frame 9 will be driven to move and reset toward the axis position close to the ball mill 3, and again through the driving bar 13 and the first gear 12, the two grabbing plates 6 of each group are driven to rotate and open, the grabbing plates 6 are transferred into the receiving groove 5, and the steel balls are released at the highest position in the ball mill 3, so that the steel balls can fall at the highest position to carry out ball milling, which not only makes the material ball milling more thorough, but also improves the ball milling efficiency.

[0037] See also Figure 1 , Figure 7 , Figure 8 and Fig. 9 The material discharge structure includes a receiving hopper 24 arranged on the right side of the ball mill 3, one end of the discharge pipe 8 is fixedly inserted into the receiving hopper 24, brackets 25 are installed on both sides of the receiving hopper 24, the bottom ends of the two brackets 25 are welded to the bottom plate 1, a dust shielding structure is arranged on the top of the receiving hopper 24, a material discharge pipe 26 is installed on the bottom end of the receiving hopper 24, a material dividing structure is arranged on the material discharge pipe 26, and a screening structure is arranged in the material discharge pipe 26;

[0038] The material distribution structure includes a material distribution opening 27 opened above the front and rear sides of the material distribution pipe 26, and a material distribution frame 28 is installed on the outer side of the material distribution pipe 26 at the position of the material distribution opening 27, and the lower inner wall of the material distribution frame 28 is an inclined surface;

[0039] The dust-blocking structure includes a placement groove opened in the middle of the receiving hopper 24, in which a mounting frame 29 is placed, in which a dust-blocking net 30 is installed, and handles 31 are fixedly passed through the front and rear edges of the mounting frame 29, and magnetic blocks are installed on the two bottom ends of the handles 31 passing through the mounting frame 29, and the magnetic blocks are adsorbed on the lower groove wall of the placement groove, and the material after ball milling in the ball mill 3 enters the receiving hopper 24, and the completely ball-milled material is discharged from the bottom end of the discharge pipe 26, and the incompletely ball-milled material is discharged from the distribution port 27, thereby realizing the classified discharge function, so that unqualified materials can be ball-milled again, thereby improving the quality of ball milling work, and when discharging materials, the dust-blocking net 30 can be used to shield the smoke and dust generated during the discharging process, thereby improving the quality of the working environment.

[0040] See also Figure 1 , Figure 7 , Figure 8 and Fig. 9 The screening structure includes grooves 40 provided on the inner walls of the front and rear sides of the feeding tube 26. The grooves 40 are located below the material distribution port 27. Lifting plates 33 are provided in the two grooves 40. A telescopic rod 34 is connected between the lifting plates 33 and the upper groove wall of the groove 40. A spring 35 is sleeved on the telescopic rod 34. The two ends of the spring 35 are respectively connected to the lifting plates 33 and the upper groove wall of the groove 40. A sieve plate 32 is installed between the two lifting plates 33. The sieve plate 32 is in an inverted "V" shape. A lifting structure is provided on the feeding tube 26.

[0041] The lifting structure includes two side panels 37 arranged close to the inner walls of the front and rear sides of the feeding tube 26, and the side panels 37 are provided with openings 38. The two ends of the screen plate 32 pass through the openings 38, and the side panels 37 are blocked at the position of the material distribution port 27. The side panels 37 are in an "L" shape. The two side panels 37 are respectively connected to the bottom ends of the output shafts of the two electric telescopic rods 36. The top ends of the electric telescopic rods 36 are installed under the feeding frame 28. A driving block 39 is installed on the lower groove wall of the opening 38 on one side of the side panel 37 close to the groove 40. When feeding in the feeding tube 26, the electric telescopic rod 36 is started to drive the side panel 37 to move up and down. When the side panel 37 moves up, the opening 38 on the side panel 37 is aligned with the material distribution port 27. The feed opening 27 is connected, thereby opening the feed opening 27. As the side plate 37 continues to move upward, the lifting plate 33 is driven upward by the driving block 39, and the sieve plate 32 is driven upward at the same time, so that unqualified materials screened out on the sieve plate 32 can be discharged from the feed opening 27, and qualified materials screened out on the sieve plate 32 are discharged from the bottom end of the discharge pipe 26, thereby realizing the classified discharge function. When the side plate 37 moves downward, the side plate 37 covers the feed opening 27 again to prevent some qualified materials from being discharged directly from the feed opening 27. At the same time, the elastic force of the spring 35 is used to push the lifting plate 33 and the sieve plate 32 to move downward and reset as a whole, so that the sieve plate 32 moves up and down with the side plate 37, and the screening work can be better performed.

[0042] The implementation principle of the lead-zinc ore beneficiation production ball milling equipment of the embodiment of the present invention is as follows: first, after the material to be ball milled is added from the feed pipe 7 to the ball mill 3, the motor 20 can be started to drive the transmission rod 21 on the second mounting plate 19 to rotate, and the ball mill 3 is driven to rotate through the second gear 22 and the third gear 23. When the ball mill 3 rotates, it drives one end of the insertion rod 14 on the driving frame 9 to slide in the lower connecting groove 18 to the second arc groove 17, thereby driving the driving frame 9 to move to a position away from the axis of the ball mill 3, and through the driving bar 13 and the first gear 1 2, automatically drives the two rotating shafts 4 of each group to rotate, and drives the two grabbing plates 6 of each group to rotate and close, so as to grab some steel balls. In this way, as the ball mill 3 rotates, it drives one end of the insertion rod 14 to slide from the second arc groove 17 to the upper connecting groove 18, and slides to the first arc groove 16. In this process, it will drive the driving frame 9 to move and reset to the axial position close to the ball mill 3, and again drive the two grabbing plates 6 of each group to rotate and open through the driving bar 13 and the first gear 12, and the grabbing plates 6 are transferred to the receiving groove 5, and in the ball mill 3 The steel ball is released at the highest position of the material, so that the steel ball can fall at the highest position to perform ball milling, which not only makes the material more thoroughly milled, but also improves the efficiency of ball milling. Then, the milled material enters the receiving hopper 24 from the discharge pipe 8 and is discharged from the discharge pipe 26. At this time, the electric telescopic rod 36 is started to drive the side plate 37 to move up and down. When the side plate 37 moves up, the opening 38 on the side plate 37 is connected with the distribution port 27, thereby opening the distribution port 27. As the side plate 37 continues to move up, the lifting plate 33 is driven to move up through the driving block 39, and at the same time drives As the sieve plate 32 moves upward, unqualified materials screened out on the sieve plate 32 can be discharged from the feed opening 27, and qualified materials screened out on the sieve plate 32 can be discharged from the bottom end of the discharge pipe 26, thereby realizing the classified discharge function. When the side plate 37 moves downward, the side plate 37 again covers the feed opening 27 to prevent some qualified materials from being discharged directly from the feed opening 27. At the same time, the elastic force of the spring 35 is used to push the lifting plate 33 and the sieve plate 32 to move downward and reset as a whole. In this way, the sieve plate 32 moves up and down with the side plate 37, and can better perform the material screening work. The structure is simple and the function is practical.

Claims

1. A lead-zinc ore beneficiation production ball milling equipment, comprising a bottom plate and a ball milling cylinder, characterized in that: The first mounting plates are fastened with bolts on both sides of the bottom plate, a ball mill is arranged between the two first mounting plates, a feed pipe is connected to the left end of the ball mill, the feed pipe rotates through the first mounting plate on the left, a discharge pipe is connected to the right end of the ball mill, the discharge pipe rotates through the first mounting plate on the right, a driving structure is arranged on the bottom plate, a grabbing and releasing structure is arranged in the ball mill, a driving structure is arranged on the two first mounting plates, and a discharge structure is arranged at the right end of the bottom plate; The grabbing and releasing structure comprises a plurality of rotating shafts that rotate and pass through the inner wall of the ball mill, and the two rotating shafts of each group are fixedly sleeved with grabbing plates, and the grabbing plates are arc-shaped plates. The inner wall of the ball mill is provided with a receiving groove at a position corresponding to each grabbing plate, and the two grabbing plates of each group are symmetrically arranged with each other; The driving structure includes a first gear fixedly mounted on one end of each rotating shaft passing through the ball milling cylinder, a driving frame is provided at the edges of the two end surfaces of the ball milling cylinder corresponding to the position of each group of rotating shafts, a driving strip is installed in the middle of the inner wall of the driving frame, each of the driving strips is located between the two first gears of each group, and teeth meshing with the first gear are provided on both side surfaces of the driving strip, and an insertion rod is connected in the middle of the driving strip, and a driving plate is provided on one side of the two first mounting plates close to the ball milling cylinder, a first arc groove is provided at one edge of the driving plate, and a second arc groove is provided at the other edge of the driving plate, and two connecting grooves are provided on the driving plate, and the two connecting grooves are respectively connected to the first arc groove and the second arc groove, and one end of the insertion rod slides in each groove of the driving plate, and the radius of the first arc groove is smaller than the radius of the second arc groove.

2. A lead-zinc ore dressing production ball milling equipment according to claim 1, characterized in that: A moving bar is installed in the middle of the driving frame near one side of the ball mill. The moving bar is slidably arranged in the radial groove on the ball mill. The radial groove is distributed along the radial direction of the ball mill. The driving plate is connected to the first mounting plate through a connecting column, and each of the connecting grooves is in a "Z" shape.

3. A lead-zinc ore dressing production ball milling equipment according to claim 1, characterized in that: The driving structure includes two second mounting plates installed on the bottom plate near the two first mounting plates, a motor is installed on one of the second mounting plates, a transmission rod is connected to one end of the motor output shaft, the transmission rod rotates and passes through the two second mounting plates, a second gear is fixedly sleeved near both ends of the transmission rod, a third gear is fixedly sleeved at the position of the second gear on the ball mill, and the second gear is meshingly connected with the third gear.

4. A lead-zinc ore dressing production ball milling equipment according to claim 1, characterized in that: The material discharge structure includes a receiving hopper arranged on the right side of the ball mill, one end of the discharge pipe is fixedly inserted into the receiving hopper, brackets are installed on both sides of the receiving hopper, the bottom ends of the two brackets are welded to the bottom plate, a dust shielding structure is arranged on the top of the receiving hopper, a material discharge pipe is installed on the bottom end of the receiving hopper, a material dividing structure is arranged on the material discharge pipe, and a screening structure is arranged inside the material discharge pipe.

5. A lead-zinc ore beneficiation production ball milling equipment according to claim 4, characterized in that: The material distribution structure includes a distribution opening opened above the front and rear sides of the material discharge pipe, and a material discharge frame is installed on the outer side of the material discharge pipe at the position of the distribution opening, and the lower inner wall of the material discharge frame is an inclined surface.

6. A lead-zinc ore dressing production ball milling equipment according to claim 4, characterized in that: The dust shield structure includes a placement groove opened in the middle of the receiving hopper, an installation frame is placed in the placement groove, a dust shield net is installed in the installation frame, handles are fixedly passed through the front and rear edges of the installation frame, and magnetic blocks are installed on the two bottom ends of the handles passing through the installation frame, and the magnetic blocks are adsorbed on the lower groove wall of the placement groove.

7. A lead-zinc ore dressing production ball milling equipment according to claim 5, characterized in that: The screening structure includes grooves opened on the inner walls of the front and rear sides of the feeding tube, the grooves are located below the material distribution port, and lifting plates are provided in the two grooves. A telescopic rod is connected between the lifting plate and the upper groove wall of the groove, and a spring is sleeved on the telescopic rod. The two ends of the spring are respectively connected to the lifting plate and the upper groove wall of the groove. A screening plate is installed between the two lifting plates, and the screening plate is in an inverted "V" shape. A lifting structure is provided on the feeding tube.

8. A lead-zinc ore dressing production ball milling equipment according to claim 7, characterized in that: The lifting structure includes two side panels arranged close to the inner walls of the front and rear sides of the discharge pipe, and openings are opened on the side panels. The two ends of the screen plate pass through the openings, and the side panels are blocked at the position of the material distribution port. The side panels are in an "L" shape, and the two side panels are respectively connected to the bottom ends of the output shafts of the two electric telescopic rods. The top end of the electric telescopic rod is installed under the discharge frame, and a driving block is installed on the lower groove wall of the opening close to one side of the groove on the side panel.

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