Lining plate structure of ball mill

Abstract

The utility model provides a ball mill lining plate structure which comprises a sleeve, a plurality of lining plates are circumferentially distributed on the inner wall of the sleeve in the axial direction, spacing ribs are arranged between every two adjacent lining plates, every two adjacent lining plates clamp and fix the spacing ribs, a first limiting protrusion is arranged at one axial end of each lining plate, and a second limiting protrusion is arranged at the other axial end of each lining plate. According to the lining plate structure of the ball mill, the lining plates are circumferentially arranged on the inner wall of the sleeve in the axial direction, so that the lining plates and the spacing ribs are sequentially and alternately arranged to form the lining layer of the ball mill, and the structure is firm and reliable; the interval ribs are made of heat dissipation materials, heat dissipation channels in the interval ribs can achieve multiple effects such as sufficient and rapid heat dissipation, and the situation that heat is generated to damage equipment and the ore pulp environment is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of mineral processing equipment technology, and relates to ball mills, and more particularly to a ball mill liner structure. Background Technology

[0002] In mineral processing, the task of grinding is to completely or substantially separate the valuable components in the ore into individual particles, while minimizing over-grinding, and to provide the beneficiation process with a suitable feed slurry (particle size and mass fraction) to create conditions for better recovery of the valuable components from the ore. The quality of the beneficiation results largely depends on the quality of the grinding product. Grinding ore is typically carried out in a grinding mill. Ball mills are widely used in mineral processing plants to grind various ores.

[0003] A ball mill typically consists of a horizontal cylindrical body, hollow inlet and outlet shafts, and grinding heads. The cylindrical body is a long cylinder with liners fixed inside. It contains a considerable number of steel balls. As the cylinder rotates, centrifugal force and friction propel the steel balls to higher positions. As friction decreases, the balls fall back down, impacting the minerals on the bottom wall of the inner chamber, continuously crushing them until they reach the desired particle size. However, the constant impact of the steel balls against the inner wall generates a significant amount of heat. Excessive heat can cause mineral deterioration, negatively impacting the machine's operation and lifespan.

[0004] In existing ball mill technology, cooling is mainly achieved through heat exchange between the outer wall and cooling water, such as by spraying the cooling medium directly onto the ball mill body using a spray device. However, during ball mill operation, heat is concentrated inside, and heat exchange solely through the outside is inefficient and has limited heat dissipation effect. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, this utility model proposes a ball mill liner structure to solve the technical problem that the ball mill cannot quickly and fully dissipate heat during operation.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A ball mill liner structure includes a sleeve, wherein multiple liners are arranged circumferentially along the inner wall of the sleeve, and a spacer rib is provided between two adjacent liners. The two adjacent liners clamp and fix the spacer rib. A first limiting protrusion is provided at one axial end of the liner, and a second limiting protrusion is provided at the other axial end of the liner.

[0008] This utility model also has the following technical features:

[0009] The liner is composed of a first outer arc surface, a first inner arc surface and first oblique cut surfaces on both sides. The first inner arc surfaces of two adjacent liners are connected to each other, and the first outer arc surface of the liner is in contact with the inner wall of the sleeve.

[0010] The arc length of the first outer arc surface is less than the arc length of the first inner arc surface, and the cross-section of the liner is a fan shape that contracts outward and expands inward.

[0011] The first inner arc surfaces of the multiple liners are connected to each other to form a cylindrical inner cavity of the ball mill.

[0012] The spacer rib is composed of a central angle, a second outer arc surface, and second oblique cut surfaces on both sides. The second oblique cut surfaces on both sides of the spacer rib are in contact with the first oblique cut surfaces on both sides of the liner. The central angle of the spacer rib is in contact with the first inner arc surface of the liner. The second outer arc surface of the spacer rib is in contact with the inner wall of the sleeve.

[0013] The sleeve is provided with an end mounting plate at its left end. The end mounting plate has multiple mounting grooves that are closed on the left and open on the right. Each mounting groove is provided with a spring element and an elastic block in sequence. One end of the elastic block is in contact with the spring element to push the spring element. The other end of the elastic block has a limiting groove that cooperates with the first limiting protrusion. The other end face of the elastic block protrudes from the right opening of the mounting groove.

[0014] The right end of the sleeve is provided with an end mating plate, and the end mating plate has multiple mating grooves that are closed on the right and open on the left. The mating grooves cooperate with the second limiting protrusion.

[0015] The end mounting plate and the sleeve are fixedly connected to each other or integrally formed; the end mating plate and the sleeve are fixedly connected to each other or integrally formed.

[0016] Multiple mounting countersunk holes are formed on the outer wall of the sleeve, and fasteners are placed in the mounting countersunk holes. The fasteners pass through the sleeve and are fastened to the liner.

[0017] The spacer bars are provided with heat dissipation channels.

[0018] The first and second limiting protrusions are rectangular block structures.

[0019] Compared with the prior art, the present invention has the following beneficial technical effects:

[0020] (I) This utility model proposes a ball mill liner structure, which adopts a liner arranged axially and circumferentially on the inner wall of the sleeve, so that the liner and the spacer ribs are arranged in an alternating order to form the inner liner of the ball mill. The structure is firm and reliable. The spacer ribs are made of heat dissipation material and the heat dissipation channels in the spacer ribs can achieve multiple effects such as sufficient and rapid heat dissipation, avoiding heat damage to the equipment and slurry environment.

[0021] (II) This utility model adopts a combination structure of liner plate and spacer ribs, which makes the stress more stable and can reduce the entry of impurities into the gaps, thus improving the service life of the ball mill.

[0022] (III) The ball mill liner structure proposed in this utility model is easy to install. It can be installed by elastic compression and pressing, and can be completed with the help of a robot, reducing labor costs. It is easy to replace and wear out. Attached Figure Description

[0023] Figure 1 This is a cross-sectional schematic diagram of the novel ball mill structure.

[0024] Figure 2 This is a schematic diagram of the ball mill liner structure.

[0025] Figure 3 This is a schematic diagram of the end face of the ball mill liner structure.

[0026] The meanings of the labels in the figure are as follows: 1-sleeve, 2-liner, 3-spacer rib, 4-first limiting protrusion, 5-second limiting protrusion, 6-inner cavity, 7-end mounting plate, 8-end mating plate, 9-matting groove, 10-mounting countersunk hole, 11-fastener.

[0027] 201 - First outer arc surface, 202 - First inner arc surface, 203 - First oblique cut surface.

[0028] 301 - Central angle, 302 - Second outer arc surface, 303 - Second oblique tangent surface.

[0029] 701-Mounting groove, 702-Spring element, 703-Elastic pressure block, 704-Limiting groove.

[0030] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, all equipment and components in this utility model are based on equipment and components known in the prior art.

[0032] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0033] Example:

[0034] This embodiment proposes a ball mill liner structure, including a sleeve 1, such as... Figures 1 to 3 As shown, multiple liner plates 2 are arranged circumferentially along the inner wall of the sleeve 1. A spacer rib 3 is provided between two adjacent liner plates 2. The two adjacent liner plates 2 clamp and fix the spacer rib 3. A first limiting protrusion 4 is provided at one axial end of the liner plate 2, and a second limiting protrusion 5 is provided at the other axial end of the liner plate 2.

[0035] like Figure 2 and Figure 3 As shown, the liner 2 is composed of a first outer arc surface 201, a first inner arc surface 202 and first oblique cut surfaces 203 on both sides. The first inner arc surfaces 202 of two adjacent liners 2 are connected to each other, and the first outer arc surface 201 of the liner 2 is in contact with the inner wall of the sleeve 1.

[0036] like Figure 2 and Figure 3 As shown, the arc length of the first outer arc surface 201 is less than the arc length of the first inner arc surface 202, and the cross-section of the liner 2 is a fan shape that is contracted outward and expanded inward.

[0037] like Figure 2 As shown, the first inner arc surfaces 202 of multiple liner plates 2 are interconnected to form the cylindrical inner chamber 6 of the ball mill.

[0038] like Figure 2 and Figure 3 As shown, the spacer rib 3 is composed of a central angle 301, a second outer arc surface 302, and second oblique cut surfaces 303 on both sides. The second oblique cut surfaces 303 on both sides of the spacer rib 3 are attached to the first oblique cut surfaces 203 on both sides of the liner plate 2. The central angle 301 of the spacer rib 3 is attached to the junction of the first inner arc surface 202 of the liner plate 2. The second outer arc surface 302 of the spacer rib 3 is attached to the inner wall of the sleeve 1.

[0039] like Figure 1 As shown, an end mounting plate 7 is provided at the left end of the sleeve 1. Multiple mounting grooves 701 with the left side closed and the right side open are provided in the end mounting plate 7. A spring element 702 and an elastic pressure block 703 are arranged in sequence in each mounting groove 701. One end of the elastic pressure block 703 contacts the spring element 702 to push the spring element 702. The other end of the elastic pressure block 703 is provided with a limiting groove 704. The limiting groove 704 cooperates with the first limiting protrusion 4. The other end face of the elastic pressure block 703 protrudes from the right opening of the mounting groove 601.

[0040] like Figure 1 As shown, the right end of the sleeve 1 is provided with an end mating plate 8, and the end mating plate 8 has multiple mating grooves 9 that are closed on the right and open on the left. The mating grooves 9 cooperate with the second limiting protrusion 5 on the right side of the liner 2.

[0041] like Figure 1 As shown, the end mounting plate 7 is fixedly connected to the sleeve 1 or integrally formed; the end mating plate 8 is fixedly connected to the sleeve 1 or integrally formed.

[0042] like Figure 1 As shown, multiple mounting countersunk holes 10 are formed on the outer wall of the sleeve 1. Fasteners 11 are installed in the mounting countersunk holes 10. The fasteners 11 pass through the sleeve 1 and are fastened to the liner 2, so that the liner 2 is firmly fixed to the inner wall of the sleeve 1 in the axial direction. Two adjacent liners 2 are fixed to the inner wall of the sleeve 1, and the spacer rib 3 between them is pressed tightly against the inner wall of the sleeve 1. The liner 2 and the spacer rib 3 together constitute the inner lining layer of the sleeve 1.

[0043] In this embodiment, preferably, the spacer rib 3 has a honeycomb structure inside, and a heat dissipation channel is provided inside the spacer rib 3. The heat dissipation channel uses a sound-absorbing material, such as a sound-insulating pad, which can reduce the noise of the ball mill. Preferably, the heat dissipation channel uses a magnetic material, such as a magnet block, which can improve the grinding effect by utilizing the magnetic field effect.

[0044] In this embodiment, preferably, the first limiting protrusion 4 and the second limiting protrusion 5 are cuboid block structures, and the first limiting protrusion 4 and the second limiting protrusion 5 are located at the center of the left and right end faces of the liner plate 2.

[0045] In this specific embodiment, when installing the new ball mill, the liner 2 and the spacer ribs 3 are first installed inside the sleeve 1. A first limiting protrusion 4 and a second limiting protrusion 5 are provided at both axial ends of the liner 2 body, protruding from the end face of the liner 2 body. One end of the liner 2 first moves towards the mounting groove 701 of the end mounting plate 7, at which point the liner 2 and the sleeve 1 are at a slightly inclined angle. The first limiting protrusion 4 on the end face of the liner 2 contacts the elastic pressure block 703 and forms a pressing action. The elastic pressure block 703 acts on the spring element 702, and the limiting groove 704 on the elastic pressure block 703 forms a limiting fit with the first limiting protrusion 4. Then, the liner 2 squeezes the extra space formed by the elastic pressure block 703, causing the second limiting protrusion 5 at the other axial end of the liner 2 to engage with the mating groove 9 on the end mating plate 8. When the second limiting protrusion 5 is inserted from the outside of the end mating plate 8 into the mating groove 9, a plug-in fit is formed. Next, spacer ribs 3 and liner plates 2 are added in an alternating sequence, with the liner plates 2 and spacer ribs 3 arranged alternately and abutting against the inner wall of the sleeve 1. The first inner arc surfaces 202 of multiple liner plates 2 are interconnected to form a cylindrical inner chamber 6 of the ball mill. Finally, the liner plates 2 are axially and firmly fixed to the inner wall of the sleeve 1. Several mounting countersunk holes 10 are provided on the outer wall of the sleeve 1. Fasteners 11 are installed in the mounting countersunk holes 10. The fasteners 11 extend from the outer wall of the sleeve 1 into the mounting countersunk holes 10, pass through the sleeve 1, and form a threaded fastening fit with the liner plates 2 inside the sleeve 1, thereby firmly fixing the liner plates 2 axially to the inner wall of the sleeve 1. Adjacent liner plates 2 are fixed to the inner wall of the sleeve 1, while the spacer ribs 3 in between are tightly pressed against the inner wall of the sleeve 1. The liner plates 2 and spacer ribs 3 together constitute the inner lining layer of the sleeve 1. The liner 2 and the spacer ribs 3 are arranged in an alternating sequence to form the inner liner of the ball mill. The structure is solid and reliable. The spacer ribs 3 are made of heat-dissipating material and the heat dissipation channels in the spacer ribs 3 can achieve multiple effects such as sufficient and rapid heat dissipation, avoiding heat damage to the equipment and slurry environment.

Claims

1. A ball mill liner structure comprising a sleeve (1), characterized in that, The inner wall of the sleeve (1) is provided with a plurality of lining plates (2) in the axial circumferential direction, and a spacing rib (3) is arranged between two adjacent lining plates (2), the two adjacent lining plates (2) clamping and fixing the spacing rib (3), one end of the lining plate (2) in the axial direction is provided with a first limiting protrusion (4), and the other end of the lining plate (2) in the axial direction is provided with a second limiting protrusion (5). The spacing rib (3) is internally provided with a heat dissipation channel.

2. The mill liner structure of claim 1, wherein, The lining plate (2) is composed of a first outer arc surface (201), a first inner arc surface (202), and first bevel surfaces (203) on both sides, the first inner arc surfaces (202) of two adjacent lining plates (2) are connected to each other, and the first outer arc surface (201) of the lining plate (2) is attached to the inner wall of the sleeve (1). The arc length of the first outer arc surface (201) is smaller than that of the first inner arc surface (202), and the cross section of the lining plate (2) is a fan-shaped structure with an outer shrinkage and an inner expansion. The first inner arc surfaces (202) of the plurality of lining plates (2) are connected to each other to form a cylindrical inner chamber (6) of the ball mill.

3. The mill liner structure of claim 1, wherein, The spacing rib (3) is composed of a central angle (301), a second outer arc surface (302), and second bevel surfaces (303) on both sides, the second bevel surfaces (303) on both sides of the spacing rib (3) are attached to the first bevel surfaces (203) on both sides of the lining plate (2), the central angle (301) of the spacing rib (3) is attached to the connection part of the first inner arc surface (202) of the lining plate (2), and the second outer arc surface (302) of the spacing rib (3) is attached to the inner wall of the sleeve (1).

4. The mill liner structure of claim 1, wherein, The left end of the sleeve (1) is provided with an end mounting plate (7), a plurality of left-closed right-open mounting grooves (701) are formed in the end mounting plate (7), a spring element (702) and an elastic pressing block (703) are sequentially arranged in each mounting groove (701), one end of the elastic pressing block (703) is in contact with the spring element (702) for pushing the spring element (702), the other end of the elastic pressing block (703) is provided with a limiting groove (704), the limiting groove (704) is matched with the first limiting protrusion (4), and the other end surface of the elastic pressing block (703) protrudes from the right opening of the mounting groove (701). The right end of the sleeve (1) is provided with an end matching plate (8), a plurality of right-closed left-open matching grooves (9) are formed in the end matching plate (8), and the matching grooves (9) are matched with the second limiting protrusions (5).

5. The mill liner structure of claim 4, wherein, The end mounting plate (7) and the sleeve (1) are fixedly connected or integrally formed; and the end matching plate (8) and the sleeve (1) are fixedly connected or integrally formed.

6. The mill liner structure of claim 1, wherein, A plurality of mounting counterbores (10) are formed in the outer wall of the sleeve (1), and fasteners (11) are arranged in the mounting counterbores (10), the fasteners (11) pass through the sleeve (1) and are fastened to the lining plates (2).

7. The mill liner structure of claim 1, wherein The first limiting protrusion (4) and the second limiting protrusion (5) are block-shaped structures of rectangular parallelepiped.

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