An automatic ball charging ball mill

Abstract

The application relates to an automatic ball-adding ball mill, and belongs to the technical field of metallurgical and mining equipment. The automatic ball-adding ball mill comprises a base plate, a feeding mechanism, a screening mechanism, a quantitative mechanism, a lifting mechanism and a ball returning pipe. The base plate is located above the ball mill, and the base plate is provided with the feeding mechanism for adding steel balls. The feeding mechanism is connected with the screening mechanism for screening the steel balls. The base plate is also provided with the quantitative mechanism corresponding to the screening mechanism and the lifting mechanism corresponding to the feeding mechanism. The quantitative mechanism and the lifting mechanism are connected through the ball returning pipe. The feeding mechanism is arranged to reduce the manual operation link, thereby reducing the labor intensity. The screening mechanism is used for sorting the steel balls, so that the mistake of adding the steel balls is avoided. Meanwhile, the quantitative mechanism is used for guaranteeing the accuracy of the weight of the added steel balls, thereby guaranteeing the working efficiency of the ball mill.

Description

Technical Field

[0001] The invention relates to a ball mill with automatic ball adding function, belonging to the technical field of ore-smelting equipment. Background Art

[0002] In the mineral smelting process, ball mills are mainly used to grind small pieces of crushed ore into powder to facilitate subsequent mineral flotation. When grinding ore, abrasives need to be added to the ball mill. Through the rotation of the ball mill, the ore inside it and the abrasives collide and rub against each other, turning the ore into mineral powder. Currently, the abrasives used with ore are generally steel balls, and there are three commonly used steel ball sizes: 90mm, 70mm, and 50mm. The larger the average size of the ore, the larger the size of the steel balls added to ensure the grinding effect. During the grinding process, the ore is mainly crushed by the impact force of the steel balls. During this process, if the size of the steel balls does not match the average size of the ore, the grinding effect is easily reduced, because the addition of steel balls to the ball mill is determined by the total mass. If the size of the steel balls is too large, the number of steel balls of the same mass will be reduced, resulting in a smaller impact area of ​​the steel balls on the ore. Large-sized steel balls have a stronger impact force, which can easily cause uneven ore particle size distribution. Mineral particles in areas with more impact are small, while mineral particles in areas with less impact are large, thus affecting subsequent production. Conversely, if the steel balls are too small, there will be insufficient impact force, resulting in substandard grinding quality. In addition, the weight of the steel balls added must be accurate. If the mass of the added steel balls is insufficient, the ball mill filling rate will be low, which may lead to insufficient grinding and affect subsequent production. If too many steel balls are added, it will not only easily destroy the normal falling trajectory of the steel balls in the ball mill, resulting in reduced grinding efficiency, but also easily cause overlap between the steel balls, causing some steel balls to fall before they can reach the required height, failing to fully exert the crushing capacity of each steel ball, resulting in unnecessary waste of resources.

[0003] The traditional method of adding steel balls is mainly manual. The staff first weighs the steel balls with a scale and then adds the corresponding weight of steel balls into the ball mill. This method is not only inefficient and labor-intensive for the staff, but also prone to omissions and mistakes in manual addition, which leads to a mismatch between the ore and the steel balls and affects the grinding efficiency of the ball mill. Summary of the Invention

[0004] In order to overcome the problems existing in the background technology, the present invention reduces the manual operation links by setting a feeding mechanism, thereby reducing labor intensity, and sorts the steel balls through the screening mechanism to avoid accidental addition. At the same time, the quantitative mechanism ensures the accuracy of the added steel balls and ensures the working efficiency of the ball mill.

[0005] In order to overcome the problems existing in the background technology, the present invention is implemented through the following technical solutions:

[0006] The ball mill with automatic ball adding includes a base plate, a feeding mechanism, a screening mechanism, a quantitative mechanism, a lifting mechanism, and a ball return tube. The base plate is located above the ball mill, and a feeding mechanism for adding steel balls is installed on the base plate. The feeding mechanism is connected to the screening mechanism for screening steel balls. The base plate is also equipped with a quantitative mechanism corresponding to the screening mechanism and a lifting mechanism corresponding to the feeding mechanism. The quantitative mechanism and the lifting mechanism are connected through the ball return tube.

[0007] Preferably, the feeding mechanism includes a base, a first telescopic rod, and a feeding box. The first telescopic rod is vertically mounted on the base, and the feeding box is mounted at the end of the first telescopic rod.

[0008] Preferably, the screening mechanism includes a screening box, a screening rod, a guide trough, a slide, and a storage box. The screening box is fixedly mounted on a base plate, and a screening rod is installed in the screening box. The end of the screening rod is connected to the guide trough, and the guide trough is connected to the storage box through a slide.

[0009] Preferably, screening rods are installed in the screening box. The screening rods are rod-shaped structures with parallel ends and inclined middle sections. The screening rods are provided in three groups: upper, middle and lower. The spacing between the groups decreases from top to bottom. A sundry drawer is also slidably connected to the bottom of the screening box, and a handle is provided on the sundry drawer.

[0010] Preferably, a discharge plate is slidably connected to the side of the storage box, the discharge plate is connected to the second telescopic rod, and a discharge chute corresponding to the quantitative mechanism is also installed on the side of the storage box.

[0011] Preferably, the quantitative mechanism includes a weighing frame, a weighing sensor, a bracket, a hopper, and a limit assembly. The weighing frame is connected to the bracket through the weighing sensor, the bottom of the bracket is fixedly connected to the hopper, a ball return port is provided on the side of the hopper, and a first limit assembly for improving the ball adding accuracy is installed at the ball return port. The bottom of the hopper is also provided with a second limit assembly for limiting the discharge of steel balls.

[0012] Preferably, the first limiting assembly includes a third telescopic rod and a first baffle. The third telescopic rod is fixedly mounted on the side of the hopper, and the end of the third telescopic rod is fixed with the first baffle corresponding to the ball return port.

[0013] Preferably, the second limiting assembly includes a fourth telescopic rod and a second baffle, the fourth telescopic rod is fixedly installed at the bottom of the hopper, and the end of the fourth telescopic rod is connected to the second baffle, and the second baffle is slidably connected to the outlet of the hopper.

[0014] Preferably, the lifting mechanism includes a lifting frame, a lifting motor, a steel cable, a lifting plate, and a directional track. The lifting frame is installed on a base plate, and a lifting motor is installed on the lifting frame. The lifting motor is connected to the lifting plate through a steel cable. A directional track is also provided on the side of the lifting plate, and the lifting plate is slidably connected to the directional track.

[0015] Preferably, a ball return box is provided on the lifting plate, and the ball return port is connected to the ball return box through a ball return tube.

[0016] The beneficial effects of the present invention are:

[0017] The invention reduces manual operation links by setting up a feeding mechanism, thereby reducing labor intensity; the steel balls are sorted by a screening mechanism to remove debris in the steel balls, preventing the debris from entering the grinder, thereby ensuring product purity; at the same time, the quantitative mechanism ensures the accuracy of the added steel ball weight and the working efficiency of the ball mill; the excess steel balls can be recycled through the ball return pipe, while ensuring the utilization rate of the steel balls, and the steel balls can be screened again by the screening mechanism to prevent the mixing of steel balls of different sizes, thereby ensuring the accuracy of steel ball addition. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the ball mill structure with automatic ball adding;

[0019] Figure 2 Schematic diagram of the internal structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the local structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the local structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the local structure of the present invention;

[0023] Figure 6 It is an enlarged schematic diagram of a local structure of the present invention;

[0024] Figure 7 It is an enlarged schematic diagram of the local structure of the present invention.

[0025] The numbers in the figure are: 1-ball mill, 101-hollow feed pipe, 2-base plate, 3-feeding mechanism, 301-base, 302-first telescopic rod, 303-load plate, 304-fixing bolt, 305-feeding box, 4-screening mechanism, 401-screening box, 402-screening rod, 403-guide trough, 404-sundry drawer, 405-handle, 406-slide, 407-storage box, 408-second telescopic rod, 409-discharge plate, 410-discharge trough, 5-quantitative mechanism, 501-weighing frame, 502-weighing sensor, 5 03-bracket, 504-hopper, 505-discharge port, 506-ball return port, 507-third telescopic rod, 508-first baffle, 509-mounting frame, 510-fourth telescopic rod, 511-second baffle, 6-lifting mechanism, 601-lifting frame, 602-lifting motor, 603-steel cable, 604-lifting plate, 605-directional track, 606-ball return box, 7-controller, 8-side panel, 801-feed port, 802-directional slot, 9-ball return tube, 10-connector, 11-hose, 12-clip, 13-fixed frame. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions, achieved objectives and effects of the present invention clear and easy to understand, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that technicians can understand them.

[0027] It should be noted that in the description of the present invention, unless otherwise specified or defined, the terms “installed”, “connected”, “connected”, “connected”, etc. should be understood in a broad sense, that is, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0028] like Figure 1-7 As shown, the ball mill for automatic ball addition includes a base plate 2, a feeding mechanism 3, a screening mechanism 4, a quantitative mechanism 5, a lifting mechanism 6, and a ball return tube 9. Since the addition of steel balls mainly relies on gravity, the device is divided into two layers, the lower layer is the ball mill 1, and the upper layer is the automatic ball addition device. The base plate 2 is located above the ball mill 1, and a feeding mechanism 3 for adding steel balls is installed on the base plate 2. The feeding mechanism 3 is connected to the screening mechanism 4 for screening steel balls. A quantitative mechanism 5 corresponding to the screening mechanism 4 is also installed on the base plate 2. The steel balls can be weighed by the quantitative mechanism 5 to ensure the accuracy of the weight of the steel balls when added. The quantitative mechanism is connected to the lifting mechanism 6 through the ball return tube 9. The excess steel balls enter the lifting mechanism 6 through the ball return tube 9. The recovered steel balls are sent back to the feeding mechanism 3 through the lifting mechanism 6 to ensure the utilization rate of the steel balls and avoid waste of resources.

[0029] In this embodiment, the feeding mechanism 3 includes a base 301, a first telescopic rod 302, and a feeding box 305. The base 301 is located below the base plate 2 and is fixedly installed on the ground. The first telescopic rod 302 is fixedly installed on the base 301 in the vertical direction. The first telescopic rod 302 uses a hydraulic cylinder, and after the end of the first telescopic rod 302 passes through the base plate 2, it is fixedly connected to the load plate 303. On the base 2, a side plate 8 is welded and fixed to the side of the load plate 303. One side of the load plate 303 is fitted with the side plate 8 to form a placement groove. The feeding box 305 is installed in the placement groove. The feeding box 305 is slidably connected to the side plate 8. To ensure the stability of the sliding process of the feeding box 305, directional grooves 802 are provided on both sides of the side plate 8, and the load plate 303 is provided with a fixing bolt 304 at the end away from the side plate 8. By rotating the fixing bolt 304, the feeding box 305 can be pressed against the side plate 8 to ensure the stability of the feeding process. At the same time, a feed port 801 is formed on the side panel 8. To facilitate the steel balls to slide into the feed port 801, the bottom surface of the feeding box 305 is inclined, with one end near the feed port 801 being lower and the other end being higher. When feeding, steel balls of any size are simply poured into the feeding box 305. The first telescopic rod 302 extends, driving the load plate 303 upward, causing the feeding box 305 to slide upward. When the steel balls reach the feed port 801, they roll into the screening mechanism 4 under the action of gravity.

[0030] In this embodiment, the screening mechanism 4 includes a screening box 401, a screening rod 402, a guide trough 403, a slide 406, and a storage box 407. One side of the side panel 8 is the feeding mechanism 3, and the other side is the screening mechanism 4. The screening box 401 is welded to the side panel 8, and three groups of screening rods 402 are installed from top to bottom in the screening box 401. The spacing between them decreases successively and corresponds to three commonly used sizes of steel balls respectively.

[0031] The screening rod 402 is parallel at both ends and tilted in the middle. The parallel ends facilitate welding of the screening rod, thereby ensuring stability. The tilted middle section provides power for the steel balls, preventing them from accumulating on the screening rod 402. At the same time, the flat tail section reduces the kinetic energy of the balls, reduces the impact of the steel balls, and increases the service life of the screening box 401. A guide groove 403 is provided at the end of the screening rod 402. The guide groove 403 is fixedly connected to the screening box 401 and is connected to a storage box 407 via a slide 406. There are three storage boxes 407, corresponding to the three groups of screening rods 402, for collecting steel balls of different sizes.

[0032] The storage box 407 has an opening on its side, to which a discharge plate 409 is slidably connected. The discharge plate 409 is connected to a second telescopic rod 408, which can be an electric telescopic rod or a pneumatic cylinder. The second telescopic rod 408 controls the left and right translation of the discharge plate, thereby controlling whether the steel balls flow out of the storage box 407. A discharge chute 410 corresponding to the metering mechanism 5 is also fixedly mounted at the opening.

[0033] The bottom of the screening box 401 is also slidably connected to a debris drawer 404 and a handle 405 is installed on the debris drawer 404. When the steel balls in the feeding box 305 are added to the screening box 401 from the feeding port 801, the largest steel balls remain in the upper layer, the middle-sized steel balls remain in the middle layer, and the smallest steel balls fall into the lower layer. The debris added along with the steel balls falls into the debris drawer, thereby preventing the debris from entering the ball mill and ensuring the purity of the product. At the same time, screening out the debris during screening can also improve the accuracy of the quantitative mechanism 5 when weighing, and avoid the debris affecting the weighing results.

[0034] In this embodiment, the quantitative mechanism 5 includes a weighing frame 501, a weighing sensor 502, a bracket 503, a hopper 504, and a position limiting assembly. The weighing frame 501 is connected to the bracket 503 via the weighing sensor 502, which is a tensile type. The bottom of the bracket 503 is fixedly connected to the hopper 504. The hopper 504 is funnel-shaped to facilitate the rolling out of the steel balls. The hopper 504 has a ball return port 506 on its side. The ball return port 506 is installed at the first position limiting assembly to improve the ball adding accuracy. The bottom of the hopper 504 is also provided with a second position limiting assembly to limit the discharge of the steel balls.

[0035] The first limiting assembly includes a third telescopic rod 507 and a first baffle 508. The third telescopic rod 507 is fixedly mounted on the side of the hopper 504. The third telescopic rod 507 is electrically powered, and a first baffle 508 corresponding to the ball return port 506 is fixed to the end of the third telescopic rod 507. The third telescopic rod 507 controls the movement of the first baffle 508, thereby controlling the steel balls from rolling out of the ball return port 506. The size of the ball return port 506 is 1.2 times the size of the largest steel ball. By using a small diameter ball return port 506, a large amount of steel balls can be prevented from rolling out during the ball return process, thereby ensuring accurate weighing.

[0036] The second limiting assembly includes a fourth telescopic rod 510 and a second baffle 511. A mounting bracket 509 is welded to the discharge port 505 of the hopper 504. A fourth telescopic rod 510 is fixed to both the left and right sides of the mounting bracket 509. The fourth telescopic rod 510 is an electric telescopic rod, and the ends of the fourth telescopic rod 510 are fixedly connected to the second baffle 511. The second baffle 511 is slidably connected to the discharge port 505. The fourth telescopic rod 510 can control the opening and closing of the second baffle 511, thereby controlling whether steel balls are added to the ball mill 1.

[0037] The specific process is as follows: Steel balls roll out of storage box 407 and into hopper 504. When the weight reaches the specified value, discharge plate 409 closes, stopping the addition of balls. However, some steel balls remain in discharge chute 410 and roll toward hopper 504. If these balls were added directly, the weight of the steel balls would be too high, thus affecting the efficiency of ball mill 1. When all the steel balls have fallen into hopper 504, the value of load cell 502 will exceed the set value. At this time, the third telescopic rod 507 opens the ball return port 506, and a small amount of steel balls are discharged from the ball return port 506. When the value of load cell 502 drops to the set value, the ball return port 506 closes, and the fourth telescopic rod 510 opens the discharge port 505, allowing steel balls to enter ball mill 1 through hollow feed tube 101, ensuring accurate addition. Excess steel balls pass through ball return port 506 and into lifting mechanism 6 via ball return tube 9.

[0038] In this embodiment, the lifting mechanism 6 includes a lifting frame 601, a lifting motor 602, a steel cable 603, a lifting plate 604, and a directional rail 605. The lifting frame 601 is welded and fixed on the base plate 2, and a lifting motor 602 is installed on the lifting frame 601. The lifting motor 602 is connected to the lifting plate 604 through a steel cable 603. A directional rail 605 is also provided on the side of the lifting plate 604, and the lifting plate 604 is slidably connected to the directional rail 605. The directional rail 605 prevents the lifting plate 604 from shaking, thereby ensuring the stability of the lifting process. At the same time, the lifting mechanism 6 can also be used to transport production materials.

[0039] Generally, a ball return box 606 is placed on the lifting plate 605. A buckle 12 is provided on the side of the ball return box 606, and a ball return tube 9 is connected to the ball return port 506. The ball return tube 9 is a hard pipe, and the ball return tube 9 is connected to the bottom of the base plate 2 through a fixing frame 13, thereby increasing the stability of the ball return tube 9. The end of the ball return tube 9 is connected to the hose 11 through a connector 10, and the hose 11 is connected to the buckle 12. Excess steel balls roll from the ball return tube 9 into the ball return box 606. Because the size of the steel balls added each time may be different, the sizes of the steel balls in the ball return box 606 are different. When the ball return box 606 is full, the hose 11 is removed, and the steel balls are sent back to the feeding box 305 by the lifting motor 602. While ensuring the recycling of the steel balls, they are re-screened to prevent the mixing of steel balls of different specifications.

[0040] On the basis of the above embodiment, the first telescopic rod 302 , the second telescopic rod 408 , the third telescopic rod 507 , the fourth telescopic rod 510 , the lifting motor 602 , and the weighing sensor 502 are all connected to the controller 7 .

[0041] The working process of the present invention is as follows: the staff adds steel balls to the feeding box 305, the first telescopic rod 302 drives the feeding box 305 to rise, so that the steel balls enter the screening box 401 from the feeding port 801, and after being sorted by the screening rod 402, the steel balls of each size roll into the corresponding storage box 407, and the debris falls into the debris drawer 404. The storage box 407 is opened by the second telescopic rod 408, and the steel balls roll into the hopper 504. When the weighing sensor 502 detects that the weight meets the standard, the storage box is closed, and wait for a while until all the steel balls fall into the hopper 504. The ball return port 506 is opened by the third telescopic rod 507 to discharge the excess steel balls, and finally the discharge port 505 is opened by the fourth telescopic rod 510 to add the steel balls to the ball mill 1.

[0042] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A ball mill with automatic ball adding, characterized in that: The automatic ball-adding ball mill comprises a base plate (2), a feeding mechanism (3), a screening mechanism (4), a quantitative mechanism (5), a lifting mechanism (6), and a ball return tube (9). The base plate (2) is located above the ball mill (1), and a feeding mechanism (3) for adding steel balls is installed on the base plate (2). The feeding mechanism (3) is connected to the screening mechanism (4) for screening the steel balls. The base plate (2) is also equipped with a quantitative mechanism (5) corresponding to the screening mechanism (4) and a lifting mechanism (6) corresponding to the feeding mechanism (3). The quantitative mechanism (5) and the lifting mechanism (6) are connected via the ball return tube (9). The screening mechanism (4) comprises a screening box (401), a screening rod (402), a guide trough (403), a slideway (406), and a storage box (407); the screening box (401) is fixedly mounted on the base plate (2); a screening rod (402) is mounted in the screening box (401); an end of the screening rod (402) is connected to the guide trough (403); and the guide trough (403) is connected to the storage box (407) via the slideway (406); The screening box (401) is provided with screening rods (402), which are rod-shaped structures with parallel ends and an inclined middle section. The screening rods (402) are provided with three groups of upper, middle and lower groups, and the spacing between the groups decreases from top to bottom. The bottom of the screening box (401) is also slidably connected to a sundry drawer (404), and the sundry drawer (404) is provided with a handle (405); The storage box (407) is slidably connected to a discharge plate (409) on the side thereof, the discharge plate (409) being connected to the second telescopic rod (408), and a discharge chute (410) corresponding to the quantitative mechanism (5) is also installed on the side of the storage box (407); The quantitative mechanism (5) comprises a weighing frame (501), a weighing sensor (502), a bracket (503), a hopper (504), and a position limiting assembly. The weighing frame (501) is connected to the bracket (503) via the weighing sensor (502). The bottom of the bracket (503) is fixedly connected to the hopper (504). A ball return port (506) is provided on the side of the hopper (504). A first position limiting assembly for improving the ball adding accuracy is installed at the ball return port (506). A second position limiting assembly for limiting the discharge of steel balls is also provided at the bottom of the hopper (504). The lifting mechanism (6) comprises a lifting frame (601), a lifting motor (602), a steel cable (603), a lifting plate (604), and a directional track (605); the lifting frame (601) is mounted on the base plate (2); the lifting motor (602) is mounted on the lifting frame (601); the lifting motor (602) is connected to the lifting plate (604) via the steel cable (603); a directional track (605) is further provided on the side of the lifting plate (604), and the lifting plate (604) is slidably connected to the directional track (605); A ball return box (606) is provided on the lifting plate (604), and the ball return port (506) is connected to the ball return box (606) via a ball return tube (9).

2. The automatic ball-adding ball mill according to claim 1, characterized in that: The feeding mechanism (3) comprises a base (301), a first telescopic rod (302), and a feeding box (305); the first telescopic rod (302) is mounted vertically on the base (301), and the feeding box (305) is mounted at the end of the first telescopic rod (302).

3. The automatic ball-adding ball mill according to claim 1, characterized in that: The first limiting assembly comprises a third telescopic rod (507) and a first baffle (508); the third telescopic rod (507) is fixedly mounted on the side of the hopper (504); and the first baffle (508) corresponding to the ball return port (506) is fixed to the end of the third telescopic rod (507).

4. The automatic ball-adding ball mill according to claim 3, characterized in that: The second limiting assembly comprises a fourth telescopic rod (510) and a second baffle (511); the fourth telescopic rod (510) is fixedly mounted on the bottom of the hopper (504); an end of the fourth telescopic rod (510) is connected to the second baffle (511); and the second baffle (511) is slidably connected to the outlet of the hopper (504).

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