Steel ball screening device for ball mill

Abstract

A steel ball screening device for a ball mill comprises a range tolerance screening mechanism, a material collecting mechanism and a steel ball feeding mechanism. The range tolerance screening mechanism comprises an upper adjusting rail, a lower adjusting rail and a vertical support, a plurality of upper rail base plates are arranged on the upper adjusting rail and are parallel to one another, and the distance between the upper rail base plates can be adjusted; a plurality of upper rail base plates are arranged on the upper adjusting rail, a plurality of lower rail base plates are arranged on the lower adjusting rail and are parallel to one another, the distance between the lower rail base plates can be adjusted, the distance between the upper rail base plates determines the diameter upper limit of the screened steel balls, and the distance between the lower rail base plates determines the diameter lower limit of the screened steel balls. The upper and lower limits of the size of the screened steel balls are controlled by adjusting the distance between the upper track base plates and the distance between the lower track base plates, so that the steel balls in a tolerance range are screened, and the steel ball screening device can also be used for screening steel balls in a certain size range.

Description

Technical Field

[0001] The invention belongs to the technical field of casting steel ball sorting equipment, and specifically refers to a steel ball screening device for a ball mill. Background Art

[0002] Cast steel balls are consumables used in ball mills. When tumbling in the ball mill, the cast steel balls grind the materials to be crushed into fine powder. Ball mills of different specifications require steel balls of different sizes. Therefore, when producing cast steel balls, it is necessary to control the size of the steel balls and separate steel balls of different sizes.

[0003] There is a reasonable tolerance in the size of cast steel balls during production. Existing steel ball screening equipment uses a screen to screen the steel balls. The screen can only screen steel balls of a single size and it is difficult to screen steel balls within a specific tolerance range. Screens of multiple sizes are required for screening, which makes the equipment structure complicated and occupies more space. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a steel ball screening device for a ball mill to at least partially solve the above technical problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a steel ball screening device for a ball mill, including a range tolerance screening mechanism, a material collection mechanism and a steel ball feeding mechanism. The range tolerance screening mechanism is arranged between the material collection mechanism and the steel ball feeding mechanism, and the range tolerance screening mechanism includes an upper adjustment track, a lower adjustment track and a vertical bracket, and the upper adjustment track and the lower adjustment track are fixed on the vertical bracket, and the upper adjustment track is provided with a plurality of upper track pads, and the plurality of upper track pads are parallel to each other, and the distance d1 between the plurality of upper track pads is adjustable; the lower adjustment track is provided with a plurality of lower track pads, and the plurality of lower track pads are parallel to each other, and the distance d2 between the plurality of lower track pads is adjustable; the lower track pads are located directly below the upper track pads, and the distance d2 between the lower track pads is smaller than the distance d1 between the upper track pads.

[0006] Furthermore, an upper telescopic connecting rod is provided on the upper adjusting rail, the upper rail pad is connected to the upper telescopic connecting rod, a compression spring is provided on the upper adjusting rail, and two ends of the compression spring are respectively connected to the upper rail pad and the upper adjusting rail.

[0007] Furthermore, a limit column is provided on the upper adjustment rail, the length of the limit column is adjustable, a limit adjustment knob is provided on the limit column, and the limit adjustment knob controls the length of the limit column; the position of the limit column corresponds to the position of the upper rail pad.

[0008] Furthermore, a reinforcing rib is provided on the fixed end of the upper telescopic link, the reinforcing rib is provided between the upper telescopic link and the upper adjustment track, and the reinforcing rib is located on the lower surface of the upper telescopic link.

[0009] Furthermore, a lower telescopic link is provided on the lower adjustment track, a telescopic adjustment knob is provided on the lower telescopic link, the lower track pad is arranged on the lower adjustment track through the lower telescopic link, and the telescopic adjustment knob controls the telescopic amount of the lower telescopic link.

[0010] Furthermore, the material collecting mechanism includes a defective product collecting tray, which is arranged on the ground and is located directly below the lower track pad. The projection of the lower track pad on the horizontal plane always falls on the defective product collecting tray.

[0011] Furthermore, the material collecting mechanism includes a defective product collecting cabin, on which a defective product chute is provided, and the defective product chute is connected to the interior of the defective product collecting cabin; the position of the defective product chute corresponds to the lower end of the upper track pad, and the height of the lower end of the upper track pad is greater than the height of the position where the defective product chute is located.

[0012] Furthermore, the material collecting mechanism includes a good product collecting cabin, which is provided with a good product inlet, which is connected to the interior of the good product collecting cabin, and the position of the good product inlet corresponds to the lower end of the lower track pad, and the height of the lower end of the lower track pad is greater than the height of the position where the good product inlet is located.

[0013] Furthermore, a discharge port is provided on the steel ball feeding mechanism, and the steel ball feeding mechanism discharges the steel balls through the discharge port. The position of the discharge port corresponds to the higher end of the upper track pad, and the height of the higher end of the upper track pad is less than the height of the discharge port.

[0014] Furthermore, a rubber buffer layer is attached to the surface of the upper track pad and the lower track pad.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The distance between the upper rail pads of the present invention determines the upper limit of the diameter of the screened steel balls, and the distance between the lower rail pads determines the lower limit of the diameter of the screened steel balls. The upper and lower limits of the size of the screened steel balls are controlled by adjusting the distance between the upper rail pads and the distance between the lower rail pads, thereby completing the screening of steel balls within the tolerance range. It can also be used for the screening of steel balls within a certain size range.

[0016] 2. The present invention limits the size range of the steel balls by adjusting the distance between the upper track pads and the distance between the lower track pads. Compared with the existing non-adjustable screens, the adjustment is more convenient and can be flexibly adjusted according to actual conditions. The structure is simpler and the use is more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a steel ball screening device for a ball mill provided in an embodiment of the present invention; Figure 2 A front view of a steel ball screening device for a ball mill provided in an embodiment of the present invention; Figure 3 A left side view of a steel ball screening device for a ball mill provided in an embodiment of the present invention; Figure 4 A three-dimensional diagram of a range tolerance screening mechanism of a steel ball screening device for a ball mill proposed in an embodiment of the present invention; Figure 5 for Figure 4 The enlarged view at center Ⅰ; Figure 6 A left side view of a range tolerance screening mechanism of a steel ball screening device for a ball mill provided in an embodiment of the present invention; Figure 7 for Figure 6 Magnified view at center II; Figure 8 A three-dimensional diagram of a material collecting mechanism of a steel ball screening device for a ball mill provided in an embodiment of the present invention.

[0018] Among them, 1100, range tolerance screening mechanism, 200, material collecting mechanism, 300, steel ball feeding mechanism, 101, upper adjustment track, 102, lower adjustment track, 103, vertical bracket, 111, upper telescopic connecting rod, 112, upper track pad, 113, compression spring, 114, limit column, 115, reinforcement rib, 116, limit adjustment knob, 121, lower telescopic connecting rod, 122, lower track pad, 123, telescopic adjustment knob, 201, defective product collection tray, 202, defective product collection cabin, 203, good product collection cabin, 204, defective product slide, 205, good product inlet, 301, discharge port.

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] like Figure 1-Figure 8 As shown, this embodiment provides a steel ball screening device for a ball mill, including a range tolerance screening mechanism 100, a material collecting mechanism 200 and a steel ball feeding mechanism 300, wherein the range tolerance screening mechanism 100 is arranged between the material collecting mechanism 200 and the steel ball feeding mechanism 300, wherein the steel ball feeding mechanism 300 transports steel balls of different sizes mixed together to the range tolerance screening mechanism 100, and the range tolerance screening mechanism 100 screens out steel balls with sizes within a specific tolerance range, and the screened out steel balls are used as good products, and the remaining steel balls and impurities are used as defective products, and the material collecting mechanism 200 has multiple storage locations, and the screened out good products and defective products are collected and stored separately in the material collecting mechanism 200.

[0023] The range tolerance screening mechanism 100 includes an upper adjustment rail 101, a lower adjustment rail 102 and a vertical bracket 103, the upper adjustment rail 101 and the lower adjustment rail 102 are fixed on the vertical bracket 103, a plurality of upper rail pads 112 are arranged on the upper adjustment rail 101, the plurality of upper rail pads 112 are parallel to each other, and the distance between the plurality of upper rail pads 112 is adjustable; a plurality of lower rail pads 122 are arranged on the lower adjustment rail 102, the plurality of lower rail pads 122 are parallel to each other, and the distance between the plurality of lower rail pads 122 is adjustable; the lower rail pads 122 are located directly below the upper rail pads 112, the distance between the lower rail pads 122 is smaller than the distance between the upper rail pads 112, the steel ball can roll between the two upper rail pads 112 or between the two lower rail pads 122, and when the diameter of the steel ball is smaller than the distance between the two upper rail pads 112 or the two lower rail pads 122, the steel ball will fall.

[0024] The steel balls conveyed by the steel ball feeding mechanism 300 first contact the upper track pad 112 on the upper adjustment track 101, and the steel balls with a diameter smaller than the distance between the upper track pads 112 fall onto the lower adjustment track 102, and the steel balls with a diameter larger than the upper track pad 112 roll on the upper track pad 112 and fall into the material collecting mechanism 200 for collection; the steel balls that fall onto the lower adjustment track 102 contact the lower track pad 122, at which time the lower track pad 122 performs secondary screening on the steel balls, and the steel balls with a diameter smaller than the distance between the lower track pads 122 and other fine impurities fall from between the lower track pads 122 to the material collecting mechanism 200 for collection, and the steel balls with a size larger than the distance between the lower track pads 122 roll on the lower track pad 122 and fall into the material collecting mechanism 200 for separate collection.

[0025] The distance d1 between the upper rail pads 112 determines the upper limit of the diameter of the screened steel balls, and the distance d2 between the lower rail pads 122 determines the lower limit of the diameter of the screened steel balls. The upper and lower limits of the size of the screened steel balls are controlled by adjusting the distance between the upper rail pads 112 and the distance between the lower rail pads 122, thereby completing the screening of steel balls within the tolerance range. It can also be used for screening steel balls within a certain size range.

[0026] When this embodiment is used in practice, the distance d1 between the upper rail pads 112 is adjusted according to actual conditions, so that the distance d1 between the upper rail pads 112 is equal to the maximum diameter of the required steel balls, and then the distance d2 between the lower rail pads 122 is adjusted, so that the distance d2 between the lower rail pads 122 is equal to the minimum diameter of the required steel balls, so that the steel balls within this size range can be screened out.

[0027] This embodiment limits the size range of the steel balls by adjusting the distance between the upper track pads 112 and the distance between the lower track pads 122. Compared with the existing non-adjustable screens, the adjustment is more convenient and can be flexibly adjusted according to actual conditions. The structure is simpler and the use is more flexible and convenient.

[0028] The upper adjustment rail 101 of the present embodiment is provided with a plurality of upper telescopic links 111, and the upper rail pad 112 is connected to the upper adjustment rail 101 via the upper telescopic links 111. At the same time, the upper rail pad 112 changes the distance between the upper rail pad 112 and the upper adjustment rail 101 via the upper telescopic links 111, thereby changing the distance between the upper rail pads 112. When the present embodiment is used, the distance between the upper rail pads 112 can be changed by adjusting the telescopic amount of the upper telescopic links 111 according to the maximum diameter of the required steel balls.

[0029] At the same time, a plurality of compression springs 113 are arranged on the upper adjustment rail 101 of the present embodiment, and the two ends of the compression spring 113 are respectively connected to the upper adjustment rail 101 and the upper rail pad 112. When the distance between the upper rail pads 112 changes, the compression spring 113 is compressed or stretched accordingly. When the present embodiment is in use, the mixed steel balls roll on the upper rail pad 112, and the gravity of the steel balls themselves will push the upper rail pad 112 to move toward the upper adjustment rail 101, while compressing the compression spring 113. After the steel balls leave the upper rail pad 112, the compression spring 113 rebounds, causing the upper rail pad 112 to return to its initial position.

[0030] When in use, the distance between the upper track pads 112 is set to the maximum diameter of the required steel balls when the compression spring 113 is at the maximum compression amount. When mixed steel balls roll on the upper track pads 112, smaller steel balls directly pass through the upper track pads 112 and fall down, while larger steel balls need to push the upper track pads 112 away from each other before they can pass through the upper track pads 112, thereby slowing down the falling frequency of the steel balls and preventing a large number of steel balls from falling at the same time and squeezing each other, causing damage to the surface of the steel balls.

[0031] In this embodiment, a plurality of limit posts 114 are provided on the upper adjustment rail 101, and a limit adjustment knob 116 is provided on the limit post 114. The extension length of the limit post 114 is adjusted by the limit adjustment knob 116. When the upper rail pad 112 moves to the position of the limit post 114, the limit post 114 blocks the upper rail pad 112 from continuing to move. By adjusting the extension length of the limit post 114, the maximum distance between the upper rail pads 112 can be controlled, that is, the maximum diameter of the screened steel balls.

[0032] When in use, the steel ball of this embodiment rolls on the upper track pad 112, and the gravity of the steel ball pushes the upper track pad 112 to move toward the upper adjusting track 101, while compressing the upper telescopic link 111 and the compression spring 113. When the diameter of the steel ball is large enough to push the upper track pad 112 onto the limit column 114, the limit column 114 blocks the movement of the upper track pad 112. Therefore, the steel ball of this diameter cannot fall from between the upper track pads 112, and can only roll on the upper track pads 112 to the material collection mechanism 200 for collection as defective products with oversized dimensions.

[0033] In this embodiment, a reinforcing rib 115 is provided on the upper telescopic link 111, and the reinforcing rib 115 is connected to the upper adjustment track 101 below the upper telescopic link 111. When in use, the weight of a large number of steel balls acts on the upper telescopic link 111 through the upper track pad 112, and a downward torque is applied to the upper telescopic link 111. During long-term operation, the upper telescopic link 111 will be subjected to excessive force and fatigue, thereby reducing the service life of the upper telescopic link 111. Therefore, by providing the reinforcing rib 115 to reinforce the structure of the upper telescopic link 111, the downward torque applied to the upper telescopic link 111 can be withstood, and the torque is transmitted to the upper adjustment track 101, thereby improving the fatigue resistance of the upper telescopic link 111.

[0034] In this embodiment, a plurality of lower telescopic links 121 are arranged on the lower adjustment track 102, and a telescopic adjustment knob 123 for adjusting the telescopic amount of the lower telescopic links 121 is arranged on the lower telescopic links 121. The lower track pads 122 are connected to the lower telescopic links 121, and the distance between the lower track pads 122 can be adjusted by adjusting the telescopic amount of the lower telescopic links 121.

[0035] When in use, the telescopic adjustment knob 123 is used to adjust the telescopic amount of the lower telescopic link 121, thereby adjusting the distance between the lower track pads 122, and adjusting the distance between the lower track pads 122 to the minimum diameter of the required steel balls. When screening steel balls, steel balls with a diameter larger than the minimum diameter can roll on the lower track pads 122, and steel balls with a diameter smaller than the minimum diameter and other fine impurities pass through the lower track pads 122 and fall down, thereby achieving limited screening of the minimum diameter of the steel balls.

[0036] The material collecting mechanism 200 of this embodiment includes a defective product collecting tray 201, which is set on the ground. The defective product collecting tray 201 is located directly below the lower track pad 122. The projection of the lower track pad 122 on the horizontal plane always falls on the defective product collecting tray 201. The defective product collecting tray 201 is used to collect steel balls and other fine impurities with a diameter smaller than the minimum diameter. These steel balls and other fine impurities with a diameter smaller than the minimum diameter pass through the lower track pad 122 and fall into the defective product collecting tray 201 for collection.

[0037] The material collecting mechanism 200 of the present embodiment includes a defective product collecting cabin 202, on which a defective product chute 204 is provided, and the defective product chute 204 is connected to the interior of the defective product collecting cabin 202; the position of the defective product chute 204 corresponds to the lower end of the upper track pad 112, and the height of the lower end of the upper track pad 112 is greater than the height of the position of the defective product chute 204, and the steel balls transported by the steel ball feeding mechanism 300 first contact the upper track pad 112 on the upper adjusting track 101, and the steel balls with a diameter smaller than the distance between the upper track pads 112 fall onto the lower adjusting track 102, and the steel balls with a diameter larger than the upper track pad 112 roll on the upper track pad 112 to the lower end of the upper track pad 112, and then enter the defective product collecting cabin 202 through the defective product chute 204 for collection, that is, the defective products collected in the defective product collecting cabin 202 are steel balls with excessive diameters.

[0038] The material collecting mechanism 200 of the present embodiment includes a good product collecting cabin 203, on which a good product inlet 205 is provided, and the good product inlet 205 is connected to the interior of the good product collecting cabin 203, and the position of the good product inlet 205 corresponds to the lower end of the lower track pad 122, and the height of the lower end of the lower track pad 122 is greater than the height of the position where the good product inlet 205 is located. The steel balls transported by the steel ball feeding mechanism 300 first contact the upper track pad 112 on the upper adjusting track 101, and the steel balls with a diameter smaller than the distance between the upper track pads 112 fall onto the lower adjusting track 102, and the steel balls with a diameter larger than the distance between the upper track pads 112 fall onto the lower adjusting track 102. The steel balls roll on the upper track pad 112 and fall into the defective product collection compartment 202 for collection; the steel balls that fall on the lower adjustment track 102 touch the lower track pad 122, at which time the lower track pad 122 performs secondary screening on the steel balls, and the steel balls with diameters smaller than the distance between the lower track pads 122 and other fine impurities will fall from between the lower track pads 122 to the defective product collection tray 201 for collection, and the steel balls with sizes larger than the distance between the lower track pads 122 will roll on the lower track pad 122 to the lower end of the lower track pad 122, and then fall into the good product collection compartment 203 through the good product inlet 205 for separate collection.

[0039] The steel ball feeding mechanism 300 of the present embodiment is provided with a discharge port 301, and the steel ball feeding mechanism 300 discharges the steel balls through the discharge port 301. The position of the discharge port 301 corresponds to the higher end of the upper track pad 112, and the height of the higher end of the upper track pad 112 is less than the height of the discharge port 301. The steel ball feeding mechanism 300 discharges the mixed steel balls through the discharge port 301 and the mixed steel balls fall on the upper track pad 112, and then the steel balls roll downward on the upper track pad 112, and the upper adjusting track 101 and the lower adjusting track 102 cooperate to complete the screening of the steel balls.

[0040] In this embodiment, a rubber buffer layer is attached to the surface of the upper track pad 112 and the lower track pad 122, which can reduce the impact of the steel ball on the upper track pad 112 and the lower track pad 122 when falling, avoiding noise and shaking.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0043] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A steel ball screening device for a ball mill, characterized in that: It comprises a range tolerance screening mechanism (100), a material collecting mechanism (200) and a steel ball feeding mechanism (300), wherein the range tolerance screening mechanism (100) is arranged between the material collecting mechanism (200) and the steel ball feeding mechanism (300); The range tolerance screening mechanism (100) comprises an upper adjustment rail (101), a lower adjustment rail (102) and a vertical bracket (103); the upper adjustment rail (101) and the lower adjustment rail (102) are fixedly arranged on the vertical bracket (103); a plurality of upper rail pads (112) are arranged on the upper adjustment rail (101); the plurality of upper rail pads (112) are parallel to each other, and a distance d1 between the plurality of upper rail pads (112) is adjustable; A plurality of lower track pads (122) are provided on the lower adjustment track (102), the plurality of lower track pads (122) are parallel to each other, and a distance d2 between the plurality of lower track pads (122) is adjustable; The lower track pad (122) is located directly below the upper track pad (112), and the distance d2 between the lower track pads (122) is smaller than the distance d1 between the upper track pads (112), wherein d1-d2 is a range tolerance.

2. The steel ball screening device for ball mill according to claim 1, characterized in that: An upper telescopic connecting rod (111) is provided on the upper adjustment rail (101), the upper rail pad (112) is connected to the upper telescopic connecting rod (111), and a compression spring (113) is provided on the upper adjustment rail (101), with two ends of the compression spring (113) respectively connected to the upper rail pad (112) and the upper adjustment rail (101).

3. The steel ball screening device for ball mill according to claim 2, characterized in that: The upper adjustment rail (101) is provided with a limit column (114), the length of the limit column (114) is adjustable, and the limit column (114) is provided with a limit adjustment knob (116), and the limit adjustment knob (116) controls the length of the limit column (114); The position of the limiting column (114) corresponds to the position of the upper track pad (112).

4. The steel ball screening device for ball mill according to claim 3, characterized in that: A reinforcing rib (115) is provided on the fixed end of the upper telescopic link (111); the reinforcing rib (115) is provided between the upper telescopic link (111) and the upper adjustment track (101); the reinforcing rib (115) is located on the lower surface of the upper telescopic link (111).

5. The steel ball screening device for ball mill according to claim 1, characterized in that: The lower adjustment track (102) is provided with a lower telescopic connecting rod (121), and the lower telescopic connecting rod (121) is provided with a telescopic adjustment knob (123). The lower track pad (122) is arranged on the lower adjustment track (102) through the lower telescopic connecting rod (121), and the telescopic adjustment knob (123) controls the telescopic amount of the lower telescopic connecting rod (121).

6. The steel ball screening device for ball mill according to claim 1, characterized in that: The material collection mechanism (200) comprises a defective product collection tray (201), wherein the defective product collection tray (201) is arranged on the ground, and the defective product collection tray (201) is located directly below the lower track pad (122), and the projection of the lower track pad (122) on the horizontal plane always falls on the defective product collection tray (201).

7. The steel ball screening device for ball mill according to claim 1, characterized in that: The material collection mechanism (200) comprises a defective product collection chamber (202), a defective product slideway (204) being provided on the defective product collection chamber (202), and the defective product slideway (204) being connected to the interior of the defective product collection chamber (202); the position of the defective product slideway (204) corresponds to the lower end of the upper track pad (112), and the height of the lower end of the upper track pad (112) is greater than the height of the position where the defective product slideway (204) is located.

8. The steel ball screening device for ball mill according to claim 1, characterized in that: The material collection mechanism (200) comprises a good product collection chamber (203), the good product collection chamber (203) is provided with a good product inlet (205), the good product inlet (205) is communicated with the interior of the good product collection chamber (203), the position of the good product inlet (205) corresponds to the lower end of the lower track pad (122), and the height of the lower end of the lower track pad (122) is greater than the height of the position where the good product inlet (205) is located.

9. The steel ball screening device for ball mill according to claim 1, characterized in that: The steel ball feeding mechanism (300) is provided with a discharge port (301), and the steel ball feeding mechanism (300) discharges the steel balls through the discharge port (301). The position of the discharge port (301) corresponds to the higher end of the upper track pad (112), and the height of the higher end of the upper track pad (112) is less than the height of the discharge port (301).

10. The steel ball screening device for ball mill according to claim 1, characterized in that: A rubber buffer layer is attached to the surfaces of the upper track pad (112) and the lower track pad (122).

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