Ore grinding and grading device and process for dissociating coarse particles based on different copper-sulfur middling specifications

Abstract

The invention discloses an ore grinding and grading device and process for dissociating coarse particles based on different copper-sulfur middling specifications, and relates to the technical field of ore grinding. The problem of vibration transmission is solved. The device specifically comprises a rack; the inner side of the rack is in transmission connection with a ball-milling barrel used for ore grinding through a flexible supporting and driving assembly, a feeding barrel penetrating through the interior of the ball-milling barrel is fixed to the inner wall of the rack, and a discharging assembly is arranged on the inner side, located below the ball-milling barrel, of the rack; the flexible supporting driving assembly is composed of a plurality of flexible supporting wheel pieces, and the flexible supporting wheel pieces are rotationally connected to the inner side of the rack through supporting shafts. By arranging the flexible supporting driving assembly, on one hand, shaftless rotary supporting of the ball milling barrel can be achieved through a plurality of flexible supporting wheel pieces of the flexible supporting driving assembly, on the other hand, the damping function can be achieved through the flexible supporting wheel pieces, and vibration generated during ball milling of the ball milling barrel is prevented from being transmitted to other parts; therefore, the noise is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of strength testing, and in particular to a coarse particle grinding and classification device and process for dissociating copper-sulfur middlings based on different specifications. Background Art

[0002] Copper-sulfur ore needs to be crushed before beneficiation. After crushing, due to the different specifications of the crushed particles, a grinding device (usually a ball mill) is needed to further grind the particles of different specifications.

[0003] After searching, the Chinese patent publication number 30N11057587528 discloses a ball milling device and a ball milling system thereof; comprising a ball milling portion and a material receiving portion corresponding to the ball milling portion, the ball milling portion comprising a ball milling power unit and a ball milling rolling unit, the ball milling rolling unit comprising a mesh drum, the ball milling power unit comprising a ball milling drum motor connected to the mesh drum, the ball milling drum motor driving the mesh drum to rotate; the material receiving portion comprising a material receiving hopper arranged on one side of the mesh drum, and further comprising a material receiving spiral motor connected to the material receiving hopper The above patent has the following deficiencies: its ball mill rolling unit is directly connected to the frame and the ball mill power unit. Since the ball mill rolling unit will generate vibrations during the ball milling process, these vibrations will be transmitted to the frame and the ball mill power unit, which will increase the noise. At the same time, the vibration transmission will make the components easily reach the fatigue limit and have a short life.

[0004] To this end, the present invention proposes a coarse particle grinding and classification device and process for dissociating copper-sulfur middlings based on different specifications. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a coarse particle grinding and classification device and process based on the dissociation of different copper-sulfur middlings specifications.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The invention relates to a coarse particle grinding and classification device for separating copper-sulfur middlings according to different specifications, comprising a frame; a ball mill for grinding is connected to the inner side of the frame via a flexible support drive assembly; a feed cylinder is fixed to the inner wall of the frame and passes through the interior of the ball mill; and a discharge assembly is provided on the inner side of the frame below the ball mill. The flexible support drive assembly is composed of a plurality of flexible support wheels, which are rotatably connected to the inner side of the frame through a support shaft, and the flexible support wheels are arranged in two groups symmetrically, with at least three flexible support wheels in each group arranged in a circular array. Limiting grooves are provided on both sides of the ball mill, and the flexible support wheels roll and fit in the inner walls of the limiting grooves.

[0007] Preferably: the flexible support wheel component includes a hub and a tire, the hub is fixed to the outer wall of the support shaft, the tire is sleeved on the outer circumferential wall of the hub, and the contact between the hub and the tire is sealed, the inner wall of the hub is provided with a connecting cavity connected to the inner cavity of the tire, and the inner wall of one side of the hub is provided with a valve core for pumping / inflating air into the connecting cavity.

[0008] Furthermore, an electric motor is fixed to the outer wall of the frame by bolts, and an output shaft of the electric motor is fixedly connected to the end of one of the support shafts by a coupling.

[0009] On the basis of the above scheme: a plurality of spacer rings are fixed at equal intervals on the inner wall of the ball mill, and the plurality of spacer rings divide the interior of the ball mill into a plurality of ball milling chambers, a grinding ball assembly is placed inside each ball milling chamber, and a discharge port is provided on the side wall of the feed barrel located at each ball milling chamber.

[0010] A better solution among the above solutions is that a plurality of guide plates arranged in a circular array are fixed to the inner wall of the ball mill located at each ball mill cavity, and the guide plates have a deflection angle α, 15°≤α≤30°.

[0011] As a further solution of the present invention: the grinding ball assembly includes a wear-resistant cavity shell and a rigid hollow shell placed in the inner cavity of the wear-resistant cavity shell, and a plurality of elastic balls are placed inside the innermost rigid hollow shell.

[0012] At the same time, the volume of the rigid hollow spherical shell is 60%-70% of the volume of the inner cavity of the wear-resistant cavity spherical shell, and the volume of the elastic ball is 40%-60% of the volume of the inner cavity of the rigid hollow spherical shell.

[0013] As a preferred embodiment of the present invention: the discharging assembly includes a guide frame, a spiral blade and a blade shaft, the guide frame is fixed to the inner side of the frame, and the top of the guide frame is trumpet-shaped, the spiral blade is rotatably connected to the inner side of the bottom of the guide frame through the blade shaft, and the blade shaft is connected to the outer wall of one of the support shafts through a synchronous belt drive.

[0014] At the same time, a plurality of gear rods are movably connected to the inner wall of the frame between the ball mill and the spiral blades. The plurality of gear rods are arranged in multiple layers, and the gear rods in adjacent layers are staggered. The ends of all the gear rods are fixed with the same pull-out plate, which is magnetically fixed to the side wall of the frame.

[0015] The coarse particle grinding and classification process based on the dissociation of different copper-sulfur middlings specifications includes a silo, feeder, ball mill, water supply machine, flotation machine, stirring mixer, and hydrocyclone separator, specifically including the following steps: S1: Put the crushed copper-sulfur ore into the silo for storage; S2: The feeder feeds the copper-sulfur ore in the silo to the ball mill, which grinds the ore and discharges it to the hydrocyclone separator. At the same time, water is supplied to the feed port of the hydrocyclone separator through the water supply machine. S3: The bottom flow of the hydrocyclone separator is the coarse ore, which is again drained to the feed of the ball mill for secondary ball milling. The top overflow of the hydrocyclone separator is drained to the stirring mixer; S4: Add reagents into the stirring mixer and stir and mix, then input into the flotation machine for flotation to separate the copper ore from the waste liquid.

[0016] The beneficial effects of the present invention are: 1. The present invention, by providing a flexible support drive assembly, can, on the one hand, realize "shaftless" rotational support of the ball mill using multiple flexible support wheels of the flexible support drive assembly; on the other hand, the flexible support wheels can realize a shock-absorbing function, thereby preventing the vibration generated during ball milling of the ball mill from being transmitted to other components, thereby reducing noise while increasing service life.

[0017] 2. The present invention, by configuring the flexible support wheel member as a combination of a wheel hub and a tire, utilizes the flexibility of the tire itself for shock absorption on the one hand, and combines the air pressure in the tire on the other hand to achieve a better shock absorption effect. At the same time, when utilizing air pressure for shock absorption, the tire will also expand with the air pressure, thereby compensating for the wear caused by long-term use and ensuring the reliability of the support for the ball mill.

[0018] 3. The present invention provides a guide plate and limits the angle of the guide plate, so that after the grinding ball assembly is limited by the guide plate, it can reach an angle of 105 to 120 degrees relative to the vertical direction before it has a downward trend. On the one hand, the grinding ball assembly can be lifted to a greater height, with greater potential energy and better ball milling effect. On the other hand, it can also prevent it from colliding with the feed barrel.

[0019] 4. The present invention, by configuring the grinding ball assembly as a combination of a wear-resistant cavity spherical shell, a rigid hollow spherical shell and an elastic ball, can achieve three-level multi-frequency impact vibration grinding by utilizing the impact of the rigid hollow spherical shell and the elasticity of the elastic ball after a single lifting and dropping of the grinding ball assembly, thereby improving the grinding effect.

[0020] 5. The present invention, on the one hand, can realize lateral conveying by setting the blade shaft, thereby ensuring the reliability of material unloading; on the other hand, by setting the stop rod, the upper and lower layers of which are staggered, so that when the copper ore falls, the stop rod can block the copper ore to a certain extent, prevent it from impacting the spiral blades, and increase its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the coarse particle grinding and classification device proposed by the present invention based on the dissociation of different copper-sulfur middlings; Figure 2 This is a schematic diagram of the structure of the flexible support drive assembly of the coarse particle grinding and classification device for dissociating different copper-sulfur middlings according to the present invention; Figure 3 This is a schematic cross-sectional view of the flexible support wheel of the coarse particle grinding and classification device for separating copper-sulfur middlings of different specifications proposed in the present invention; Figure 4 This is a schematic diagram of the internal structure of the ball mill drum of the device for dissociating coarse particles of copper-sulfur middlings of different specifications proposed in the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the ball mill barrel of the device for dissociating coarse particles of copper-sulfur middlings of different specifications proposed by the present invention; Figure 6 This is a schematic diagram of the structure of the grinding ball assembly of the grinding and classifying device for separating coarse particles of copper-sulfur middlings of different specifications proposed by the present invention; Figure 7 This is a schematic diagram of the structure of the discharging component of the grinding and classifying device for dissociating coarse particles of different copper-sulfur middling ore specifications proposed in the present invention; Figure 8 This is a schematic diagram of the baffle structure of the coarse particle grinding and classification device for separating copper-sulfur middlings of different specifications proposed in the present invention; Figure 9 This is a schematic flow chart of the coarse particle grinding and classification process based on the dissociation of different copper-sulfur middlings specifications proposed in the present invention.

[0022] In the figure: 1. Frame; 2. Feed barrel; 3. "Y"-shaped feed pipe; 4. Feed funnel; 5. Ball mill; 6. Flexible support drive assembly; 7. Discharge assembly; 8. Limiting groove; 9. Support shaft; 10. Flexible support wheel; 11. Valve core; 12. Wheel hub; 13. Connecting cavity; 14. Tire; 15. Discharge port; 16. Baffle; 17. Spacer ring; 18. Guide plate; 19. Grinding ball assembly; 20. Wear-resistant cavity shell; 21. Rigid hollow shell; 22. Elastic ball; 23. Pull-out plate; 24. Synchronous belt; 25. Guide frame; 26. Spiral blade; 27. Impeller; 28. Silo; 29. ​​Feeder; 30. Ball mill; 31. Water supply machine; 32. Flotation machine; 33. Agitator mixer; 34. Hydrocyclone separator. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0024] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention. Example

[0025] Based on the different copper-sulfur ore specifications, the coarse particle grinding and classification device is used, such as Figures 1-8 As shown, it includes a frame 1, the inner side of which is connected to a ball mill 5 for grinding ore through a flexible support drive assembly 6, the inner wall of the frame 1 is fixed with a feed barrel 2 that passes through the inside of the ball mill 5, and a discharge assembly 7 is provided on the inner side of the frame 1 below the ball mill 5.

[0026] The flexible support drive assembly 6 is composed of a plurality of flexible support wheels 10, which are rotatably connected to the inner side of the frame 1 through a support shaft 9, and the flexible support wheels 10 are arranged in two groups symmetrically, with at least three flexible support wheels 10 in each group arranged in a circular array. Limiting grooves 8 are provided on both sides of the ball mill 5, and the flexible support wheels 10 roll in engagement with the inner wall of the limiting groove 8.

[0027] This device, by setting up a flexible support drive component 6, can, on the one hand, use multiple flexible support wheels 10 of the flexible support drive component 6 to achieve "axisless" rotational support for the ball mill 5, and on the other hand, the flexible support wheels 10 can achieve a shock absorption function to prevent the vibration generated by the ball mill 5 during ball milling to be transmitted to other components, thereby reducing noise while increasing service life.

[0028] The flexible support wheel member 10 includes a hub 12 and a tire 14. The hub 12 is fixed to the outer wall of the support shaft 9, and the tire 14 is sleeved on the outer circumferential wall of the hub 12. The contact between the hub 12 and the tire 14 is sealed. The inner wall of the hub 12 is provided with a connecting cavity 13 connected to the inner cavity of the tire 14, and the inner wall of one side of the hub 12 is provided with a valve core 11 for pumping / inflating air into the connecting cavity 13.

[0029] An electric motor is fixed to the outer wall of the frame 1 by bolts, and the output shaft of the electric motor is fixedly connected to the end of one of the support shafts 9 by a coupling.

[0030] This device, by configuring the flexible supporting wheel member 10 as a combination of a wheel hub 12 and a tire 14, utilizes the flexibility of the tire 14 itself for shock absorption on the one hand, and combines the air pressure in the tire 14 on the other hand to achieve a better shock absorption effect. At the same time, when utilizing air pressure for shock absorption, the tire 14 will also expand with the air pressure, thereby compensating for the wear caused by long-term use and ensuring the reliability of supporting the ball mill 5.

[0031] In order to solve the ball milling problem; Figure 4As shown, a plurality of spacer rings 17 are fixed at equal intervals on the inner wall of the ball mill 5. The plurality of spacer rings 17 divide the interior of the ball mill 5 into a plurality of ball milling chambers. A grinding ball assembly 19 is placed inside each ball milling chamber, and a discharge port 15 is provided on the side wall of the feed barrel 2 located at each ball milling chamber.

[0032] During use, the raw materials can be input through the feed barrel 2, and the raw materials entering the feed barrel 2 are discharged into each ball mill cavity through the discharge port 15 by gravity. Then the motor is started, and it drives the flexible support wheel 10 to rotate through the support shaft 9, thereby driving the ball mill 5 to rotate. During the rotation process, the grinding ball assembly 19 and the material are continuously lifted and dropped by the ball mill 5 for collision grinding. The ground material is discharged downward through the ball mill 5 and falls into the discharge assembly 7, and then axially transported by the discharge assembly 7 for discharge.

[0033] A plurality of guide plates 18 arranged in a circular array are fixed to the inner wall of the ball mill 5 at each ball mill cavity. The guide plates 18 have a deflection angle α, 15°≤α≤30°.

[0034] The deflection angle is defined as follows: a radius is drawn from the fixing point of the guide plate 18 and the ball mill 5 to the center of the ball mill 5, and the deflection angle of the guide plate 18 in the rotation direction of the ball mill 5 relative to the radius is the deflection angle α.

[0035] This device, by providing a guide plate 18 and limiting the angle of the guide plate 18, can ensure that the grinding ball assembly 19, after being limited by the guide plate 18, can reach an angle of 105 to 120 degrees relative to the vertical direction before it has a downward trend. On the one hand, the grinding ball assembly 19 can be lifted to a greater height, with greater potential energy and a better ball milling effect. On the other hand, it can also prevent it from colliding with the feed barrel 2.

[0036] The grinding ball assembly 19 comprises a wear-resistant hollow spherical shell 20 and a rigid hollow spherical shell 21 placed in the inner cavity of the wear-resistant hollow spherical shell 20 , and a plurality of elastic balls 22 are placed inside the innermost rigid hollow spherical shell 21 .

[0037] The total volume of the rigid hollow spherical shell 21 is 60%-70% of the inner volume of the wear-resistant hollow spherical shell 20 , and the total volume of the elastic ball 22 is 40%-60% of the inner volume of the rigid hollow spherical shell 21 .

[0038] When the grinding ball assembly 19 descends, the wear-resistant hollow spherical shell 20 will first contact the material and produce a collision. Since the kinetic energy of the wear-resistant cavity spherical shell 20 will be rapidly lost after the collision, the rigid hollow spherical shell 21 inside the wear-resistant cavity spherical shell 20 will collide with each other and also collide with the wear-resistant cavity spherical shell 20, resulting in secondary multi-frequency collisions. At the same time, after the wear-resistant cavity spherical shell 20 collides, since the rigid hollow spherical shell 21 inside it has elasticity, the rigid hollow spherical shell 21 will also undergo multiple ejection collisions, realizing three multi-frequency collisions.

[0039] This device, by configuring the grinding ball assembly 19 as a combination of a wear-resistant cavity spherical shell 20, a rigid hollow spherical shell 21 and an elastic ball 22, can achieve three-level multi-frequency impact vibration grinding by utilizing the impact of the rigid hollow spherical shell 21 and the elasticity of the elastic ball 22 after a single lifting and dropping of the grinding ball assembly 19, thereby improving the grinding effect.

[0040] The discharging assembly 7 includes a guide frame 25, a spiral blade 26 and a blade shaft 27. The guide frame 25 is fixed to the inner side of the frame 1, and the top of the guide frame 25 is trumpet-shaped. The spiral blade 26 is rotatably connected to the inner side of the bottom of the guide frame 25 through the blade shaft 27.

[0041] The blade shaft 27 is connected to the outer wall of one of the support shafts 9 through a synchronous belt 24 .

[0042] A plurality of gear rods 16 are movably connected to the inner wall of the frame 1 between the ball mill 5 and the spiral blade 26. The plurality of gear rods 16 are arranged in multiple layers, and the gear rods 16 in adjacent layers are staggered. The ends of all the gear rods 16 are fixed with the same pull-out plate 23, and the pull-out plate 23 is magnetically fixed to the side wall of the frame 1.

[0043] The copper ore after ball milling passes through the ball mill 5 and enters the bottom of the guide frame 25 through the guide of the guide frame 25. When the blade shaft 27 rotates, it can drive the spiral blade 26 to rotate, thereby transporting the copper ore horizontally. In the process of falling, the gear lever 16 can block the copper ore to a certain extent to prevent it from impacting the spiral blade 26.

[0044] On the one hand, the device can realize horizontal conveying by setting the blade shaft 27 to ensure the reliability of material discharge. On the other hand, by setting the stop rod 16, the upper and lower layers of which are staggered, so that when the copper ore falls, the stop rod 16 can block the copper ore to a certain extent, prevent it from impacting the spiral blade 26, and increase its service life.

[0045] A "Y"-shaped feeding pipe 3 is fixed at both ends of the feeding barrel 2, and a feeding funnel 4 is fixed at one of the inlets of the "Y"-shaped feeding pipe 3, through which materials can be fed into the feeding barrel 2.

[0046] When this embodiment is in use, the raw materials can be input through the feed barrel 2, and the raw materials entering the feed barrel 2 are discharged into each ball mill cavity through the discharge port 15 by gravity. Then the motor is started, and it drives the flexible support wheel 10 to rotate through the support shaft 9, thereby driving the ball mill 5 to rotate. During the rotation process, the grinding ball assembly 19 and the material are continuously lifted and dropped by the ball mill 5 for collision grinding. The ground material is discharged downward through the ball mill 5 and falls into the discharge assembly 7, and then axially transported by the discharge assembly 7 for discharge. During grinding, the grinding ball assembly 19 descends, and the wear-resistant cavity ball shell 20 will first contact the material to produce a collision. Due to the kinetic energy of the wear-resistant cavity ball shell 20 after the collision It will be lost quickly, and then the rigid hollow spherical shells 21 in the wear-resistant cavity spherical shell 20 will collide with each other and also collide with the wear-resistant cavity spherical shell 20, resulting in secondary multi-frequency collisions. At the same time, after the wear-resistant cavity spherical shell 20 collides, due to the elasticity of the rigid hollow spherical shell 21 inside it, the rigid hollow spherical shell 21 will also have multiple ejection collisions, realizing three multi-frequency collisions. The copper ore after ball milling passes through the ball milling cylinder 5 and enters the bottom of the guide frame 25 through the guide of the guide frame 25. When the impeller shaft 27 rotates, it can drive the spiral blade 26 to rotate, thereby transporting the copper ore horizontally, and in the process of falling, the gear lever 16 can block the copper ore to a certain extent to prevent it from impacting the spiral blade 26. Example

[0047] Based on the coarse particle grinding and classification process of different copper-sulfur middling ore specifications, such as Figure 9 As shown, it uses a silo 28, a feeder 29, a ball mill 30, a water supply machine 31, a flotation machine 32, a stirring mixer 33, and a hydrocyclone separator 34. The ball mill 30 is the device in Example 1, which specifically includes the following steps: S1: The crushed copper-sulfur ore is placed in the silo 28 for storage; S2: The feeder 29 feeds the copper-sulfur ore in the hopper 28 to the ball mill 30. The ball mill 30 grinds the ore and then discharges the ore to the hydrocyclone separator 34. At the same time, water is supplied to the feed port of the hydrocyclone separator 34 through the water supply machine 31. S3: The bottom flow of the hydrocyclone separator 34 is the coarse ore, which is again drained to the feed of the ball mill 30 for secondary ball milling. The top overflow of the hydrocyclone separator 34 is drained to the stirring mixer 33; S4: Add reagents into the stirring mixer 33 and stir and mix, then input into the flotation machine 32 for flotation to separate the copper ore from the waste liquid.

[0048] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A coarse particle grinding and classification device for separating copper-sulfur middlings of different specifications, comprising a frame (1), characterized in that: The inner side of the frame (1) is connected to a ball mill (5) for grinding ore via a flexible support drive assembly (6); a feed cylinder (2) penetrating the interior of the ball mill (5) is fixed to the inner wall of the frame (1); and a discharge assembly (7) is provided on the inner side of the frame (1) below the ball mill (5); The flexible support drive assembly (6) is composed of a plurality of flexible support wheel members (10), the flexible support wheel members (10) being rotatably connected to the inner side of the frame (1) via a support shaft (9), and the flexible support wheel members (10) are arranged in two groups symmetrically, with at least three flexible support wheel members (10) in each group being arranged in a circular array, and limiting grooves (8) are provided on both sides of the ball mill (5), and the flexible support wheel members (10) are rollingly engaged with the inner walls of the limiting grooves (8).

2. The coarse particle grinding and classification device based on the dissociation of different copper-sulfur middlings specifications according to claim 1 is characterized in that: The flexible support wheel member (10) comprises a wheel hub (12) and a tire (14), wherein the wheel hub (12) is fixed to the outer wall of the support shaft (9), and the tire (14) is sleeved on the outer circumferential wall of the wheel hub (12), and the contact portion between the wheel hub (12) and the tire (14) is sealed and matched, and the inner wall of the wheel hub (12) is provided with a communication cavity (13) communicating with the inner cavity of the tire (14), and a valve core (11) for pumping / inflating air into the communication cavity (13) is provided on one side inner wall of the wheel hub (12).

3. The coarse particle grinding and classification device based on the dissociation of different copper-sulfur middlings specifications according to claim 1 is characterized in that: An electric motor is fixed to the outer wall of the frame (1) by means of bolts, and an output shaft of the electric motor is fixedly connected to the end of one of the support shafts (9) by means of a coupling.

4. The coarse particle grinding and classification device based on the dissociation of different copper-sulfur middlings specifications according to claim 1 is characterized in that: A plurality of spacer rings (17) are fixed at equal intervals on the inner wall of the ball mill (5), and the plurality of spacer rings (17) divide the interior of the ball mill (5) into a plurality of ball milling chambers. A grinding ball assembly (19) is placed in each ball milling chamber, and a discharge port (15) is provided on the side wall of the feed barrel (2) located at each ball milling chamber.

5. The coarse particle grinding and classification device for separating copper-sulfur middlings based on different specifications of copper-sulfur middlings according to claim 4 is characterized in that: A plurality of guide plates (18) arranged in a circular array are fixed to the inner wall of the ball milling cylinder (5) at each ball milling cavity, and the guide plates (18) have a deflection angle α, 15°≤α≤30°.

6. The coarse particle grinding and classification device for separating copper-sulfur middlings based on different specifications according to claim 4 is characterized in that: The grinding ball assembly (19) comprises a wear-resistant hollow spherical shell (20) and a rigid hollow spherical shell (21) placed in the inner cavity of the wear-resistant hollow spherical shell (20), and a plurality of elastic balls (22) are placed inside the innermost rigid hollow spherical shell (21).

7. The coarse particle grinding and classification device for separating copper-sulfur middlings based on different specifications according to claim 6 is characterized in that: The total volume of the rigid hollow spherical shell (21) is 60%-70% of the inner volume of the wear-resistant hollow spherical shell (20), and the total volume of the elastic ball (22) is 40%-60% of the inner volume of the rigid hollow spherical shell (21).

8. The coarse particle grinding and classification device based on the dissociation of different copper-sulfur middlings specifications according to claim 1 is characterized in that: The discharging assembly (7) includes a guide frame (25), a spiral blade (26) and a blade shaft (27), wherein the guide frame (25) is fixed to the inner side of the frame (1), and the upper part of the guide frame (25) is trumpet-shaped, and the spiral blade (26) is rotatably connected to the inner side of the bottom of the guide frame (25) through the blade shaft (27), and the blade shaft (27) is connected to the outer wall of one of the support shafts (9) through a synchronous belt (24).

9. The coarse particle grinding and classification device for separating copper-sulfur middlings based on different specifications according to claim 8 is characterized in that: A plurality of shift rods (16) are movably connected to the inner wall of the frame (1) between the ball mill (5) and the spiral blade (26). The plurality of shift rods (16) are arranged in multiple layers, and the shift rods (16) of adjacent layers are arranged in a staggered manner. The ends of all the shift rods (16) are fixed with the same pull-out plate (23), and the pull-out plate (23) is magnetically fixed to the side wall of the frame (1).

10. A coarse particle grinding and classification process based on the dissociation of different copper-sulfur middlings specifications, which comprises a hopper (28), a feeder (29), a ball mill (30), a water supply machine (31), a flotation machine (32), a stirring mixer (33), and a hydrocyclone separator (34). The ball mill (30) is a coarse particle grinding and classification device based on the dissociation of different copper-sulfur middlings specifications according to any one of claims 1 to 9, characterized in that: The specific steps include: S1: placing the crushed copper-sulfur ore into a silo (28) for storage; S2: The feeder (29) feeds the copper-sulfur ore in the hopper (28) to the ball mill (30), and the ball mill (30) grinds the ore and discharges the ore to the hydrocyclone separator (34). At the same time, water is supplied to the feed port of the hydrocyclone separator (34) through the water supply machine (31); S3: The bottom flow of the hydrocyclone separator (34) is the coarse ore, which is again drained to the feed of the ball mill (30) for secondary ball milling, and the top overflow of the hydrocyclone separator (34) is drained to the stirring mixer (33); S4: Add reagents to the stirring mixer (33) and stir and mix, then input into the flotation machine (32) for flotation to separate the copper ore from the waste liquid.

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