A superfine powder ball mill with reduced wear

Abstract

The invention discloses a superfine powder ball mill with reduced wear, which relates to the technical field of ball mills, including a mill cylinder and an expansion component, wherein the inner walls on both sides of the mill cylinder are provided with expansion components, and the expansion components include side grooves, buffer pads, shields, sliders, springs, connecting rods, stop washers and locking nuts. During the use of the invention, the Roots blower generates a high-pressure air flow and generates a negative pressure when passing through the venturi tube, and the top of the venturi tube is further connected to the discharge end of the mill cylinder through a storage bin to realize pneumatic conveying of powder materials. The present application is provided with a sieve barrel on the inner side of the discharge liner, and the gap between the side walls of the sieve barrel is less than the powder particle threshold of the grinding material, so that the powder raw materials entering the storage bin from the mill cylinder can be preliminarily screened, and the powder raw materials that do not meet the particle size cannot pass through the sieve barrel and are retained in the mill cylinder until they are completely crushed, which can reduce the steps of subsequent material sorting and re-grinding, and is more efficient and energy-saving.

Description

Technical Field

[0001] The invention relates to the technical field of ball mills, in particular to an ultrafine powder ball mill capable of reducing wear. Background Art

[0002] A ball mill is a device that can crush crushed materials. It consists of a horizontal cylinder, a hollow shaft for feeding and discharging materials, and a grinding head. A certain number of steel balls are loaded in the cylinder. During operation, the rotation of the cylinder drives the steel balls to rotate inside the cylinder, and the impact and crushing of the materials by the steel balls are used.

[0003] The standard steel ball diameter is 25 to 120 mm. After the ball mill has been running for a period of time, the balls in the ball mill will gradually wear out and become smaller and out of round. When the diameter of the steel ball is less than 20 to 15 mm, the impact of the steel ball on the mineral particles basically disappears. According to experience, after the alloy cast steel ball has been running for 2000 to 3000 hours, a large number of unqualified steel balls and debris will accumulate, reducing the output of the ball mill, increasing power consumption, and increasing the wear of qualified steel balls. It is very important to quickly remove unqualified steel balls and debris for energy saving and consumption reduction. At present, most of the ball mill steel balls in domestic thermal power plants are stopped and all the steel balls in the ball mill are guided out of the manhole door for steel ball sorting. The sorting takes a long time and has high labor intensity. After sorting, it takes a long time to load dozens of tons of qualified steel balls into the ball mill, which affects the normal operation of the equipment. The sorting of ball mill steel balls has long plagued power plants and cement plants and has become a major problem to be solved.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and an ultrafine powder ball mill with reduced wear is proposed. Summary of the invention

[0005] The object of the present invention is to provide an ultrafine powder ball mill with reduced wear to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wear-reducing ultrafine powder ball mill, comprising a mill cylinder and an expansion component, the inner walls on both sides of the mill cylinder are provided with expansion components, the expansion components include side grooves, buffer pads, shields, sliders, springs, connecting rods, stop washers and locking nuts, the side grooves are symmetrically opened on the inner walls on both sides of the mill cylinder, and buffer pads are nested at both ends of the side grooves, and a shield is welded and fixed on the inner side of the middle of the side grooves, sliders are slidably fitted on both sides of the side grooves, and the opposite surfaces of the sliders on both sides are elastically connected by springs, and connecting rods are integrally fixed to the inner sides of the sliders on both sides, a stop washers is snap-fitted in the middle of the connecting rod, and a locking nut is threadedly fixed to the end of the connecting rod.

[0007] Furthermore, a large gear ring is coaxially fixed to the rear end of the mill cylinder, and end flanges are integrally fixed to both ends of the mill cylinder, and the front end flange of the mill cylinder is fixed to the feed port by bolts.

[0008] Furthermore, the feed port is rotatably mounted inside the bearing bracket, and the root of the bearing bracket is fixed to the base bolts.

[0009] Furthermore, a driving motor is fixed at the rear end of the base, and the output end of the driving motor is connected to a reducer through a coupling. The output end of the reducer is rotationally connected to a pinion, and the pinion is rotatably installed inside the bridge bearing, and the pinion is meshed with the large ring gear for transmission.

[0010] Furthermore, a maintenance assembly is provided at the top middle end of the mill cylinder, and the maintenance assembly includes an inspection port, a cover plate and a handle. The inspection port is opened at the top middle end of the mill cylinder, and a cover plate is nested at the opening of the inspection port, and handles are welded and fixed on both sides of the cover plate.

[0011] Furthermore, the inspection assembly also includes through-hole pins and latches. Through-hole pins are fixed around the opening of the inspection port, and latches fastened by bolts are inserted into the through-hole pins, and the latches are pressed and fitted with the cover plate.

[0012] Furthermore, a stainless steel screen is connected to the inner side of the slider via a connecting rod, and the mesh size of the screen is smaller than the diameter of the grinding ball. Connecting pins are fixed at the four corners of the screen, and the through hole in the middle of the connecting pin is plugged into the connecting rod and fastened by a nut.

[0013] Furthermore, a steel wire rope is fixedly connected to the inner side of the connecting pin, and lifting ears are connected to the intersections of the four steel wire ropes, and the lifting ears are connected to the sling through the inspection port.

[0014] Furthermore, a sorting component is fastened to the rear end of the mill cylinder through end flange bolts, and the sorting component includes a discharge liner, a screen barrel and a storage bin. The screen barrel is fastened to the inner side of the hole in the discharge liner with bolts, and the gap between the side walls of the screen barrel is smaller than the powder particle threshold of the grinding material, and the outer side of the hole in the discharge liner is connected to the storage bin.

[0015] Furthermore, the sorting component also includes a Venturi tube, a Roots blower and a conveying pipe. The bottom opening of the storage bin is connected to the Venturi tube, one end of the Venturi tube is connected to the Roots blower, and the other end of the Venturi tube is connected to the conveying pipe.

[0016] The present invention provides an ultrafine powder ball mill with reduced wear, which has the following beneficial effects:

[0017] 1. During the use of the present invention, the aperture of the stainless steel screen of the present invention can be customized according to the steel balls of different specifications, and the aperture of the screen is always ensured to be smaller than the diameter of the steel balls in the normal state, so that the crushed residues and debris mixed in the steel balls can pass through the holes of the screen and be discharged out of the mill cylinder through the inspection port. In addition, during the sorting process, the mill cylinder can be controlled to swing slightly left and right, so that the screen maintains an inclined angle, which is convenient for sliding screening of the steel balls. After the sorting is completed, the mill cylinder is reset so that the inspection port is at the top again. At this time, a sling is used to hook the lifting ear in the middle of the screen, and the wire rope is pulled to pull the screen. The lower screen is bent and deformed, so that the sliders connected to the four corners of the screen are reset to the inside of the guard cover in the middle of the side groove. After the stop gaskets are installed to lock the positions of the adjacent sliders, the screen is removed and the cover is closed to complete the sorting and cleaning of the broken steel balls and debris in the mill cylinder. This application uses a stainless steel screen to sort the steel balls in the mill cylinder through an innovative design. There is no need to use traditional power elements such as motors and electric push rods to complete the deployment and folding of the screen, and the broken steel balls can be quickly sorted by relying on the rotation of the mill cylinder itself, without taking out the steel balls to improve the sorting efficiency.

[0018] 2. During the use of the present invention, materials are put into the feed port at one end of the mill cylinder, and the driving motor drives the pinion to rotate through the reducer, and further drives the mill cylinder to rotate through the meshing of the pinion and the large gear ring at the rear end of the mill cylinder. When in use, the rotation of the mill cylinder drives the steel ball to rotate inside the mill cylinder, and the material is crushed by the impact and rolling of the steel ball on the material. During operation, the Roots blower generates a high-pressure air flow and generates a negative pressure when passing through the Venturi tube, and the top of the Venturi tube is further connected to the discharge end of the mill cylinder through the storage bin to realize pneumatic conveying of the powder material. The present application can perform preliminary screening of the powder raw materials entering the storage bin from the mill cylinder by adding a screen barrel on the inner side of the discharge liner, and the gap between the side walls of the screen barrel is smaller than the powder particle threshold of the grinding material. The powder raw materials that do not meet the particle size cannot pass through the screen barrel and are retained in the mill cylinder until they are completely crushed, which can reduce the steps of subsequent material sorting and re-grinding, is more efficient and energy-saving, and at the same time reduces equipment investment and has low operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall external structure of the device of the present invention;

[0020] Figure 2 It is a schematic diagram of the mill cylinder structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the maintenance component of the present invention;

[0022] Figure 4 It is a schematic diagram of the overall internal structure of the device of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the components of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the screen in the folded state of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the screen in the unfolded state of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the sorting component of the present invention.

[0027] In the figure: 1. mill body; 2. large gear ring; 3. end flange; 4. feed port; 5. bearing bracket; 6. base; 7. drive motor; 8. reducer; 9. pinion; 10. bridge bearing; 11. maintenance assembly; 1101. maintenance port; 1102. cover plate; 1103. handle; 1104. through-hole pin; 1105. latch; 12. unfolding assembly; 1201. side groove; 1202. buffer pad; 1203, protective cover; 1204, slider; 1205, spring; 1206, connecting rod; 1207, stop washer; 1208, locking nut; 13, screen; 14, connecting pin; 15, wire rope; 16, lifting ear; 17, sorting assembly; 1701, discharge lining plate; 1702, screen barrel; 1703, storage bin; 1704, venturi tube; 1705, Roots blower; 1706, conveying pipe. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are further described in detail with reference to the accompanying drawings and examples. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] See also Figures 3 to 7The present invention provides a technical solution: a superfine powder ball mill with reduced wear, comprising a mill cylinder 1 and an expansion component 12, wherein an inspection component 11 is arranged at the middle of the top of the mill cylinder 1, and the inspection component 11 comprises an inspection port 1101, a cover plate 1102 and a handle 1103, wherein the inspection port 1101 is arranged at the middle of the top of the mill cylinder 1, and the cover plate 1102 is nested at the opening of the inspection port 1101, and handles 1103 are welded and fixed on both sides of the cover plate 1102, and the inspection component 11 also comprises a through hole The inspection port 1101 is provided with a through-hole pin 1104 fixed around the opening, and the through-hole pin 1104 is plugged with a plug 1105 fastened by bolts, and the plug 1105 is pressed and matched with the cover plate 1102. The inner walls of both sides of the mill cylinder 1 are provided with an expansion component 12, and the expansion component 12 includes a side groove 1201, a buffer pad 1202, a shield 1203, a slider 1204, a spring 1205, a connecting rod 1206, a stop washer 1207 and a locking nut 1 208, the side grooves 1201 are symmetrically arranged on the inner walls of both sides of the mill cylinder 1, and the two ends of the side grooves 1201 are embedded with buffer pads 1202, and the inner side of the middle of the side grooves 1201 is welded and fixed with a shield 1203, the two sides of the side grooves 1201 are slidably matched with sliders 1204, and the opposite surfaces of the sliders 1204 on both sides are elastically connected by springs 1205, and the inner sides of the sliders 1204 on both sides are integrally fixed with connecting rods 1206, and the middle part of the connecting rod 1206 is clamped with a stop gasket 1207, and the connecting rod 120 6 The end of the slider 1204 is threadedly fixed with a locking nut 1208, the inner side of the slider 1204 is connected to a stainless steel screen 13 through a connecting rod 1206, and the mesh size of the screen 13 is smaller than the diameter of the grinding ball, and connecting pins 14 are fixed at the four corners of the screen 13, and the middle hole of the connecting pin 14 is plugged into the connecting rod 1206 and fastened by a nut, and a steel wire rope 15 is fixedly connected to the inner side of the connecting pin 14, and the intersection of the steel wire rope 15 at four places is connected with a lifting lug 16, and the lifting lug 16 is connected to the lifting device through the inspection port 1101;

[0030] The specific operation is as follows: when it is necessary to sort and clean the broken steel balls and debris in the mill cylinder 1, the mill cylinder 1 is rotated and its inspection port 1101 is kept at the top when it is stopped. At this time, the steel balls are accumulated at the bottom of the mill cylinder 1. The operator pulls out the latch 1105 from the through-hole pin 1104 and lifts the cover plate 1102 away from the inspection port 1101 through the handle 1103. Thereafter, the operator enters the mill cylinder 1 through the inspection port 1101 and connects the connecting pins 14 around the screen 13 to the connecting rod 1206 on the inner side of the slider 1204 respectively. After preparation, the stop gasket 1207 is removed so that The two adjacent sliders 1204 are unlocked, and under the action of the reset force of the spring 1205, the adjacent sliders 1204 move back to back until the end of the side groove 1201. At this time, the screen 13 that was originally in a folded state is stretched straight and placed horizontally in the middle of the mill cylinder 1. Thereafter, the operator exits the mill cylinder 1, and the mill cylinder 1 slowly rotates 180 degrees so that the steel balls originally accumulated at the bottom of the cylinder slide to the surface of the screen 13. At this time, the inspection port 1101 in the open state is moved to the bottom of the mill cylinder 1. The aperture of the stainless steel screen 13 of the present application can be customized according to steel balls of different specifications, and the screen is always guaranteed. The aperture of 13 is smaller than the diameter of the steel ball in the normal state, so that the crushed residues and debris mixed in the steel balls can pass through the holes of the screen 13 and be discharged from the mill cylinder 1 through the inspection port 1101. In addition, during the sorting process, the mill cylinder 1 can be controlled to swing slightly left and right, so that the screen 13 maintains an inclined angle, which is convenient for sliding screening of the steel balls. After the sorting is completed, the mill cylinder 1 is reset so that the inspection port 1101 is at the top again. At this time, the lifting device is used to hook the lifting ear 16 in the middle of the screen 13. Under the traction of the wire rope 15, the screen 13 is bent and deformed, so that the sliders 1204 connected to the four corners of the screen 13 Reset to the inside of the shield 1203 in the middle of the side groove 1201, install the stop gasket 1207 to lock the position of the adjacent slider 1204, remove the screen 13 and close the cover 1102 to complete the sorting and cleaning of the broken steel balls and debris in the mill cylinder 1. The present application uses the innovative design of the stainless steel screen 13 to sort the steel balls in the mill cylinder 1. It does not need to use traditional power elements such as motors and electric push rods to complete the deployment and folding of the screen 13. In addition, the rotation of the mill cylinder 1 itself can complete the rapid sorting of the broken steel balls, and there is no need to take out the steel balls to improve the sorting efficiency.

[0031] See also Figure 1 to Figure 2A large gear ring 2 is coaxially fixed to the rear end of the mill cylinder 1, and end flanges 3 are integrally fixed to both ends of the mill cylinder 1, and the front end flange 3 of the mill cylinder 1 is fixed to the feed port 4 by bolts, and the feed port 4 is rotatably mounted inside the bearing bracket 5, and the root of the bearing bracket 5 is bolted to the base 6, and a driving motor 7 is fixed to the rear end of the base 6, and the output end of the driving motor 7 is connected to a reducer 8 through a coupling, and the output end of the reducer 8 is rotatably connected to a pinion 9, and the pinion 9 is rotatably mounted inside the bridge bearing 10, and the pinion 9 is meshed with the large gear ring 2 for transmission;

[0032] The specific operation is as follows: the material is fed into the mill cylinder 1 through the feed port 4, and the driving motor 7 drives the pinion 9 to rotate through the reducer 8, and further drives the mill cylinder 1 to rotate through the engagement of the pinion 9 with the large gear ring 2 at the rear end of the mill cylinder 1. When in use, the rotation of the mill cylinder 1 drives the steel balls to rotate inside the mill cylinder 1, and the materials are crushed by the impact and rolling of the steel balls on the materials;

[0033] See also Figure 8 The rear end of the mill cylinder 1 is fastened with a sorting assembly 17 by bolts through the end flange 3. The sorting assembly 17 includes a discharge liner 1701, a screen barrel 1702 and a storage bin 1703. The screen barrel 1702 is fastened with bolts on the inner side of the hole of the discharge liner 1701, and the gap between the side walls of the screen barrel 1702 is smaller than the powder particle threshold of the ground material, and the outer side of the hole of the discharge liner 1701 is connected with the storage bin 1703. The sorting assembly 17 also includes a venturi tube 1704, a roots blower 1705 and a conveying pipe 1706. The bottom opening of the storage bin 1703 is connected with the venturi tube 1704, and one end of the venturi tube 1704 is connected with the roots blower 1705, and the other end of the venturi tube 1704 is connected with the conveying pipe 1706;

[0034] The specific operation is as follows. During the working process, the Roots blower 1705 generates a high-pressure air flow and generates a negative pressure when passing through the Venturi tube 1704, and the top of the Venturi tube 1704 is further connected to the discharge end of the mill cylinder 1 through the storage bin 1703 to realize pneumatic conveying of the powder material. The present application installs a screen barrel 1702 on the inner side of the discharge liner 1701, and the side wall gap of the screen barrel 1702 is smaller than the powder particle threshold of the grinding material. The powder raw material entering the storage bin 1703 from the mill cylinder 1 can be preliminarily screened. The powder raw material that does not meet the particle size cannot pass through the screen barrel 1702 and is retained in the mill cylinder 1 until it is completely crushed, which can reduce the subsequent material sorting and re-grinding steps, is more efficient and energy-saving, and at the same time reduces equipment investment and low operating costs.

[0035] In summary, when using the ultrafine powder ball mill with reduced wear, the material is put into the mill cylinder 1 through the feed port 4, and the driving motor 7 drives the pinion 9 to rotate through the reducer 8, and further drives the mill cylinder 1 to rotate through the engagement of the pinion 9 with the large gear ring 2 at the rear end of the mill cylinder 1. When in use, the rotation of the mill cylinder 1 drives the steel balls to rotate inside the mill cylinder 1, and the impact and crushing of the materials by the steel balls are used to crush the materials. During the working process, the Roots blower 1705 generates a high-pressure air flow and generates a negative pressure when passing through the Venturi tube 1704, and the top of the Venturi tube 1704 is further connected to the discharge end of the mill cylinder 1 through the storage bin 1703, so as to realize the pneumatic conveying of the powder material. The present application achieves pneumatic conveying of the powder material by installing a Roots blower 1705 on the inner side of the discharge liner 1701. There is a screen barrel 1702, and the gap between the side walls of the screen barrel 1702 is smaller than the powder particle threshold of the grinding material, so that the powder raw materials entering the storage bin 1703 from the mill cylinder 1 can be preliminarily screened. The powder raw materials that do not meet the particle size cannot pass through the screen barrel 1702 and are retained in the mill cylinder 1 until they are completely crushed, which can reduce the steps of subsequent material sorting and re-grinding, making it more efficient and energy-saving, while reducing equipment investment and low operating costs. When it is necessary to sort and clean the broken steel balls and debris in the mill cylinder 1, the mill cylinder 1 is rotated and its inspection port 1101 is kept at the top when it is shut down. At this time, the steel balls are accumulated at the bottom of the mill cylinder 1, and the operator pulls out the latch 1105 from the through-hole pin 1104 and lifts the cover plate 1102 away for inspection through the handle 1103 Opening 1101, then the operator enters the mill cylinder 1 through the inspection opening 1101, connects the connecting pins 14 around the screen 13 to the connecting rod 1206 on the inner side of the slider 1204 respectively, and after preparation is completed, removes the stop gasket 1207 to make the two adjacent sliders 1204 disengage from the lock, and under the action of the reset force of the spring 1205, the adjacent sliders 1204 move back to back until the end of the side groove 1201. At this time, the screen 13 originally in the folded state is straightened and placed horizontally in the middle of the mill cylinder 1, and then the operator exits the mill cylinder 1, and the mill cylinder 1 slowly rotates 180 degrees to make the steel balls originally accumulated at the bottom of the cylinder slide to the surface of the screen 13. At this time, the inspection opening 1101 in the open state is displaced to the bottom of the mill cylinder 1, and this application does not The aperture of the stainless steel screen 13 can be customized according to steel balls of different specifications, and the aperture of the screen 13 is always ensured to be smaller than the diameter of the steel balls in a normal state, so that the crushed residues and debris mixed in the steel balls can pass through the holes of the screen 13 and be discharged from the mill cylinder 1 through the inspection port 1101. In addition, during the sorting process, the mill cylinder 1 can be controlled to swing slightly left and right, so that the screen 13 maintains an inclined angle, which is convenient for sliding screening of the steel balls. After the sorting is completed, the mill cylinder 1 is reset so that the inspection port 1101 is at the top again. At this time, a sling is used to hook the ear 16 in the middle of the screen 13. Under the traction of the wire rope 15, the screen 13 is bent and deformed, so that the sliders 1204 connected to the four corners of the screen 13 are reset to the inside of the shield 1203 in the middle of the side groove 1201.After installing the stop gasket 1207 to lock the position of the adjacent slider 1204, remove the screen 13 and close the cover 1102 to complete the sorting and cleaning of the broken steel balls and debris in the mill cylinder 1. This application uses the stainless steel screen 13 to sort the steel balls in the mill cylinder 1. The innovative design does not require the use of traditional power elements such as motors and electric push rods to complete the deployment and folding of the screen 13. The broken steel balls can be quickly sorted by the rotation of the mill cylinder 1 itself, and the sorting efficiency is improved without taking out the steel balls.

[0036] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various implementations with various modifications suitable for specific uses.

Claims

1. A superfine powder ball mill with reduced wear, characterized in that: The invention comprises a mill cylinder (1) and an expansion component (12), wherein the inner walls on both sides of the mill cylinder (1) are provided with the expansion component (12), and the expansion component (12) comprises a side groove (1201), a buffer pad (1202), a shield (1203), a slider (1204), a spring (1205), a connecting rod (1206), a stop washer (1207) and a locking nut (1208), wherein the side groove (1201) is symmetrically arranged on the inner walls on both sides of the mill cylinder (1), and the buffer pads (1202) are embedded at both ends of the side groove (1201), and the shield (1203) is welded and fixed on the inner side of the middle of the side groove (1201), and the sliders (1204) are slidably matched at both sides of the side groove (1201), and the sliders (1204) on both sides are ) are elastically connected by springs (1205), and connecting rods (1206) are integrally fixed to the inner sides of the sliders (1204) on both sides, a stop gasket (1207) is snap-fitted to the middle of the connecting rod (1206), and a locking nut (1208) is threadedly fixed to the end of the connecting rod (1206), an inspection component (11) is arranged at the middle end of the top of the mill cylinder (1), and the inspection component (11) comprises an inspection port (1101), a cover plate (1102) and a handle (1103), the inspection port (1101) is opened at the middle end of the top of the mill cylinder (1), and the cover plate (1102) is embedded in the opening of the inspection port (1101), and handles (1103) are welded and fixed on both sides of the cover plate (1102), the inspection port (1101) is provided with a cover plate (1102) and a handle (1103) is provided at the middle end of the top of the mill cylinder (1). The component (11) further comprises a through-hole pin (1104) and a latch (1105), the through-hole pin (1104) being fixed around the opening of the inspection port (1101), and the latch (1105) being inserted into the through-hole pin (1104) and fastened by bolts, and the latch (1105) is pressed and fitted with the cover plate (1102), the inner side of the slider (1204) is connected to a stainless steel screen (13) via a connecting rod (1206), and the mesh size of the screen (13) is smaller than the diameter of the grinding ball, the four corners of the screen (13) are fixed with connecting pins (14), and the through-hole in the middle of the connecting pin (14) is plugged and fitted with the connecting rod (1206) and fastened by nuts, the inner side of the connecting pin (14) is fixedly connected to a steel wire rope (15), and the four corners of the connecting pin (14) are fixed with a steel wire rope (15), and the connecting pin (14) is fixed and fastened by nuts. A lifting lug (16) is connected to the intersection of the steel wire rope (15), and the lifting lug (16) is connected to the lifting device through the inspection port (1101). When it is necessary to sort and clean the damaged steel balls and debris in the mill cylinder (1), the mill cylinder (1) is rotated and its inspection port (1101) is kept at the top when it is shut down. At this time, the steel balls are accumulated at the bottom of the mill cylinder (1). The operator removes the latch (1105) from the through-hole pin (1104) and lifts the cover plate (1102) away from the inspection port (1101) through the handle (1103). Thereafter, the operator enters the mill cylinder (1) through the inspection port (1101) and connects the connecting pins (14) around the screen (13) to the connecting rods (1206) on the inner side of the slider (1204).After the preparation is completed, the stop gasket (1207) is removed to disengage the two adjacent sliders (1204). Under the reset force of the spring (1205), the adjacent sliders (1204) move in opposite directions until they reach the end of the side groove (1201). At this time, the sieve (13) that was originally in a folded state is stretched straight and placed horizontally in the middle of the mill cylinder (1). After that, the operator exits the mill cylinder (1), and the mill cylinder (1) slowly rotates 180 degrees so that the particles originally accumulated on the mill cylinder (1) are released. The steel balls at the bottom of the cylinder slide onto the surface of the screen (13). At this time, the inspection port (1101) in the open state moves to the bottom of the mill cylinder (1). The aperture of the screen (13) can be customized according to steel balls of different specifications, and the aperture of the screen (13) is always ensured to be smaller than the diameter of the steel balls in the normal state, so that the crushed residues and debris mixed in the steel balls can pass through the holes of the screen (13) and be discharged from the mill cylinder (1) through the inspection port (1101).

2. The ultrafine powder ball mill with reduced wear according to claim 1, characterized in that: A large gear ring (2) is coaxially fixed to the rear end of the mill cylinder (1), and end flanges (3) are integrally fixed to both ends of the mill cylinder (1), and the front end flange (3) of the mill cylinder (1) is fixed to the feed port (4) by means of bolts.

3. The ultrafine powder ball mill with reduced wear according to claim 2, characterized in that: The feed port (4) is rotatably mounted inside the bearing bracket (5), and the root of the bearing bracket (5) is fixed to the base (6) by bolts.

4. The ultrafine powder ball mill with reduced wear according to claim 3, characterized in that: A driving motor (7) is fixed to the rear end of the base (6), and the output end of the driving motor (7) is connected to a reducer (8) via a coupling, and the output end of the reducer (8) is rotationally connected to a pinion (9), and the pinion (9) is rotationally mounted inside a bridge bearing (10), and the pinion (9) is meshed with the large gear ring (2) for transmission.

5. The ultrafine powder ball mill with reduced wear according to claim 1, characterized in that: The rear end of the mill cylinder (1) is bolted with a sorting component (17) via an end flange (3), and the sorting component (17) comprises a discharge liner (1701), a screen barrel (1702) and a storage bin (1703). The screen barrel (1702) is bolted to the inner side of the hole of the discharge liner (1701), and the gap between the side walls of the screen barrel (1702) is smaller than the powder particle threshold of the grinding material, and the outer side of the hole of the discharge liner (1701) is connected to the storage bin (1703).

6. The ultrafine powder ball mill with reduced wear according to claim 5, characterized in that: The sorting component (17) further comprises a venturi tube (1704), a Roots blower (1705) and a conveying pipe (1706); the bottom opening of the storage bin (1703) is connected to the venturi tube (1704), one end of the venturi tube (1704) is connected to the Roots blower (1705), and the other end of the venturi tube (1704) is connected to the conveying pipe (1706).

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