Acid resistant ball mill system

Abstract

The utility model relates to an acid -resistant ball mill system, including feeding mechanism, ball mill and cylinder screen, feeding mechanism includes sand feeding device, belt feeding chute and buffer feed bin, and the outlet of sand feeding device and belt feeding chute all are connected with the bin communication of buffer feed bin, and the inner wall of sand feeding device and buffer feed bin all is provided with rubber lining, and the chute of belt feeding chute is the structure of bottom wall thick sidewall thin, the ball mill cylinder inner wall is provided with three layers of acid -resistant anticorrosive sheet, the ball mill feed inlet, ball mill discharge port and cylinder screen screen frame all are stainless steel framework and anticorrosive rubber layer integration composite and form, and anticorrosive rubber layer is sprayed in the inner surface of stainless steel framework, the utility model discloses through the overall reconstruction feeding mechanism, ball mill and cylinder screen, has improved the durability, operating stability and maintenance convenience of equipment under the acidic medium environment obviously, provides an economic, efficient, stable ball mill system for acid material.

Description

Technical Field

[0001] This utility model relates to the field of ball milling technology, specifically to an acid-resistant ball milling system. Background Technology

[0002] Ball milling systems are widely used in industries such as mineral processing, building materials, and chemicals for crushing and grinding materials. However, traditional ball milling systems suffer from problems such as high energy consumption, rapid liner wear, and poor acid resistance during operation, especially when processing ores containing acidic media.

[0003] However, process optimization revealed that adding extraction liquid to the ball mill during the ball milling stage allows the acid to play its role, ensuring the ore comes into full contact with the acid while being ground, achieving pre-leaching. This reduces the amount of sulfuric acid used in subsequent stirred leaching and effectively decreases the amount of fresh water entering the production system, thus alleviating the tailings dam expansion problem. Based on these process considerations, the ball milling system needs to meet the requirements of acid corrosion resistance and wear resistance.

[0004] However, existing ball milling systems made of carbon steel cannot meet the requirements of acidic environments (pH=1-2) and are easily corroded by acid contact. Therefore, this application aims to provide an acid-resistant ball milling system to enhance the acid resistance and wear resistance of the equipment. Utility Model Content

[0005] This invention provides an acid-resistant ball milling system.

[0006] The specific technical solution of this utility model is: an acid-resistant ball mill system, including a feeding mechanism, a ball mill and a cylindrical screen. The feeding mechanism includes a sand feeding device, a belt feeding chute and a buffer feeding bin. The outlets of the sand feeding device and the belt feeding chute are connected to the bin of the buffer feeding bin. The inner walls of the sand feeding device and the buffer feeding bin are provided with rubber liners. The belt feeding chute has a structure with a thick bottom and thin side walls.

[0007] The inner walls of the ball mill cylinder and the inlet and outlet end caps are all equipped with three layers of acid-resistant and anti-corrosion plates; the ball mill's inlet, outlet, and cylindrical screen frame are all integrally composited with a stainless steel frame and an anti-corrosion rubber layer, and the anti-corrosion rubber layer is sprayed on the inner surface of the stainless steel frame.

[0008] Furthermore, preferably, the three-layer acid-resistant and corrosion-resistant plate includes a rubber plate, a protective plate, and a rubber liner. The rubber plate is in close contact with the inner wall of the cylinder and the inlet and outlet end caps. The protective plate is laid on the inner side of the rubber plate, and the rubber liner is laid on the inner side of the protective plate. The protective plate is composed of a stainless steel plate and a vulcanized rubber layer, and the stainless steel plate side faces the rubber plate when it is laid.

[0009] Furthermore, preferably, the rubber sheet is 3mm thick and is adhered to the inner wall of the ball mill cylinder using acid-resistant adhesive.

[0010] Furthermore, preferably, the protective plate is composed of a 3mm stainless steel plate and a 3mm vulcanized rubber layer.

[0011] Furthermore, preferably, the rubber sheet is bonded to the inner wall of the ball mill cylinder and the inlet and outlet end caps using acid-resistant adhesive. The rubber sheet, the protective plate, and the rubber liner are also provided with corresponding bolt holes, which can be bolted to the inner wall of the ball mill cylinder and the inlet and outlet end caps.

[0012] Furthermore, preferably, the rubber liner is provided with raised lifting strips, and the rubber liner laid on the inner wall of the ball mill cylinder and the lifting strips are integrally formed.

[0013] Furthermore, preferably, the rubber sheet, protective plate and rubber liner laid on the inner wall of the ball mill cylinder are connected to the inner wall of the cylinder by sealing bolts. The sealing bolts include bolts, sealing sleeves, cup-shaped sealing rings, cup-shaped washers and locking nuts. The sealing sleeves are made of acid-resistant rubber material and have outwardly extending annular pressing edges at both ends.

[0014] Furthermore, preferably, the bottom surface of the rubber liner plate laid on the inner wall of the ball mill cylinder is provided with a raised frame around its perimeter, and a raised ring is provided on the outer edge of the bolt hole on the bottom surface, the raised ring being at the same height as the raised frame.

[0015] Furthermore, preferably, the sand settling feeding device includes a feeding hopper, and the top of the feeding hopper is provided with a detachable sand settling box cover.

[0016] Furthermore, preferably, the sand settling tank cover is connected to a feed pipe, the side wall of the feed hopper is connected to a discharge bend, the discharge bend is connected to a buffer feed bin, and the inner walls of the feed pipe and the discharge bend are lined with acid-resistant and wear-resistant rubber.

[0017] Furthermore, preferably, the belt feed chute is composed of a hopper, an upper buffer box, a lower buffer box, several intermediate feed chutes and an end feed chute connected in sequence; the lower buffer box, several intermediate feed chutes and the end feed chute are all of the structure with thick bottom and thin side walls, and each of the intermediate feed chutes is provided with a detachable chute cover plate on its top surface.

[0018] Furthermore, preferably, the buffer feed hopper includes a hopper, and the second rubber liner at the bottom of the hopper has an undulating shape.

[0019] Furthermore, preferably, the top of the hopper is provided with a removable cover.

[0020] Furthermore, preferably, the side wall of the hopper is connected to a feeding bend, and the inner wall of the feeding bend is lined with an acid-resistant and wear-resistant rubber liner.

[0021] Furthermore, preferably, the anti-corrosion rubber layer of the ball mill's feed inlet, discharge outlet, and the cylindrical screen frame has undergone vulcanization treatment.

[0022] Furthermore, preferably, the screen frame is also provided with a screen cover, the inner wall of the screen cover is lined with a rubber layer, and a third rubber liner is laid on top of the rubber layer at the bottom.

[0023] Furthermore, preferably, the rubber layer on the inner wall of the screen cover is 6 mm thick.

[0024] Furthermore, preferably, the inner wall of the screen frame is lined with a screen plate, and the screen plate is made of acid-resistant and wear-resistant rubber material.

[0025] The beneficial effects of this utility model are as follows: By comprehensively modifying the feeding mechanism, ball mill, and cylindrical screen, this utility model enables it to effectively cope with the corrosion of acidic media, significantly improving the durability, operational stability, and maintenance convenience of the equipment in acidic media environments. It provides an economical, efficient, and stable ball milling system for acidic materials. The specific beneficial effects are as follows:

[0026] (1) Enhanced wear and corrosion resistance of the equipment: By reasonably setting acid-resistant and wear-resistant rubber lining in the feeding mechanism, setting triple sealing acid-resistant and anti-corrosion layer in the ball mill cylinder, using stainless steel frame and anti-corrosion rubber spray coating as an integrated composite material for the ball mill inlet and outlet and cylindrical screen frame, and setting acid-resistant and wear-resistant rubber material in the screen plate and screen cover, the overall wear and corrosion resistance of the ball mill system is enhanced, making it suitable for long-term ball milling and pre-leaching operations in acidic media.

[0027] (2) Improved equipment stability: The added buffer feed hopper in the feeding mechanism can effectively buffer the impact of the front-end feeding device, reduce the direct impact of materials on the ball mill inlet, and reduce equipment wear; the three-layer acid-resistant and corrosion-resistant layer inside the cylinder is made of acid-resistant rubber material and is connected with bolts to ensure the sealing of the connection points and prevent acidic media leakage. These designs help ensure the reliability and stability of equipment operation.

[0028] (3) Improved ease of maintenance and replacement: The design concept of detachable cover plate and segmented chute in the feeding mechanism greatly facilitates the maintenance and replacement of the equipment, which helps to reduce operating and maintenance costs and reduce maintenance time.

[0029] (4) Improved overall work efficiency: The modification of the feeding mechanism can ensure that acidic materials are supplied to the ball mill in a stable and uniform manner, thereby improving the ball milling efficiency and product quality; the anti-corrosion rubber coating of the ball mill's inlet, outlet and cylindrical screen is made in an integrated manner, which can improve the overall performance and operating efficiency of the equipment and reduce downtime caused by equipment failure. Attached Figure Description

[0030] Figure 1 This is an overall structural diagram of an acid-resistant ball milling system according to the present invention;

[0031] Figure 2 This is a schematic diagram of the grit feeding device;

[0032] Figure 3 This is a longitudinal cross-sectional view of the grit feeding device;

[0033] Figure 4 This is a schematic diagram of the structure of a belt feed chute;

[0034] Figure 5 This is a longitudinal cross-sectional view of the belt feed chute;

[0035] Figure 6 This is a schematic diagram of the structure of the buffer feed hopper;

[0036] Figure 7 This is a longitudinal cross-sectional view of the buffer feed hopper;

[0037] Figure 8 This is a schematic diagram of the ball mill feed inlet.

[0038] Figure 9 This is a longitudinal cross-sectional view of the ball mill feed inlet;

[0039] Figure 10 A schematic diagram of the ball mill discharge port;

[0040] Figure 11 This is a longitudinal cross-sectional view of the ball mill discharge port;

[0041] Figure 12 This is a longitudinal cross-sectional view of the ball mill cylinder;

[0042] Figure 13 This is a cross-sectional view of the feed end or discharge end of the ball mill cylinder;

[0043] Figure 14 This is a front view of the rubber liner.

[0044] Figure 15 This is a structural diagram of a rubber liner (the right image shows the middle rubber liner, and the left image shows the edge rubber liner).

[0045] Figure 16 This is a view of the back of the rubber liner.

[0046] Figure 17 for Figure 12 Cross-sectional view at point C;

[0047] Figure 18 This is a schematic diagram of the sealing bolt structure;

[0048] Figure 19 for Figure 13 Cross-sectional view of the connection structure of the lifting strip and the three-layer acid-resistant and anti-corrosion plate;

[0049] Figure 20 This is a schematic diagram of the structure of a cylindrical sieve;

[0050] Figure 21 This is a cross-sectional view of the cylindrical screen and screen cover;

[0051] Figure 22 This is a right view of the sieve cover;

[0052] Figure 23 for Figure 22 DD cross-section;

[0053] Figure 24 for Figure 22 EE cross-section;

[0054] In the picture:

[0055] 1-Sand feeding device 1, 11-Feeding hopper, 12-Sand box cover plate, 13-Infeed pipe, 14-Discharge elbow, 15-First rubber liner;

[0056] 2-Belt feed chute, 21-Hopper, 22-Upper buffer box, 23-Lower buffer box, 24-First end feed chute, 25-Secondary feed chute, 251-Chute cover plate, 26-End feed chute;

[0057] 3-Buffer feed hopper, 31-hopper, 311-removable cover plate, 32-feeding bend, 33-second rubber liner;

[0058] 5-Feed inlet, 51-Stainless steel frame, 52-Anti-corrosion rubber layer;

[0059] 6-Ball mill, 61-Rubber plate, 62-Guard plate, 63-Rubber liner, 631-Raised frame, 632-Bolt hole, 633-Raised ring, 64-Lifting bar, 65-Sealing bolt, 651-Bolt, 652-Sealing sleeve, 653-Bowl-shaped sealing ring, 654-Bowl-shaped washer, 655-Locking nut, 66-T-bolt;

[0060] 7-Discharge port; 8-Cylindrical screen; 81-Screen frame; 82-Screen plate; 83-Guide plate; 9-Screen cover; 91-Rubber layer; 92-Third rubber liner. Detailed Implementation

[0061] To make the technical problems and solutions solved by this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0062] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0063] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0064] like Figure 1 As shown in the figure, this embodiment provides an acid-resistant ball milling system, including a feeding mechanism, a ball mill 6, and a cylindrical screen 8. The feeding mechanism is connected to the feed inlet 5 of the ball mill, and the cylindrical screen 8 is connected to the discharge outlet 7 of the ball mill. This system, through a comprehensive modification of the feeding mechanism, ball mill 6, and cylindrical screen 8, enables it to effectively cope with the corrosion of acidic media, thereby significantly improving the durability and ease of maintenance of the equipment, and providing a complete ball milling treatment system for acidic materials.

[0065] The feeding mechanism includes a sand feeding device 1, a belt feed chute 2, and a buffer feed bin 3. The outlets of the sand feeding device 1 and the belt feed chute 2 are both connected to the hopper of the buffer feed bin 3, and the outlet of the buffer feed bin 3 is connected to the ball mill inlet 5. The feeding mechanism provided in this embodiment modifies the traditional sand feeding device 1 and belt feed chute 2 to provide a stable and uniform supply of acidic materials to the ball mill. Furthermore, by adding a buffer feed bin 3 between the sand feeding device 1 and the belt feed chute 2 and the ball mill inlet 5, the feeding from the two front-end feeding devices is effectively buffered, reducing the impact of materials directly entering the ball mill inlet 5.

[0066] like Figure 2 Figure 3As shown, the sand settling feeding device 1 includes a feeding hopper 11, and a sand settling box cover 12 is provided on the top of the feeding hopper 11. The sand settling box cover 12 is bolted to the top of the feeding hopper 11 for easy disassembly and maintenance. A feed pipe 13 is connected to the sand settling box cover 12, and a discharge bend 14 is connected to the side wall of the feeding hopper 11, which is connected to the buffer feeding bin 3. A first rubber liner 15 is provided on the inner wall of the feeding hopper 11, and the first rubber liner 15 is bolted to the feeding hopper 11 for easy disassembly and replacement; the inner walls of the feed pipe 13 and the discharge bend 14 are lined with acid-resistant and wear-resistant rubber liners. The sand settling feeding device 1 provided in this embodiment transforms the traditional integrated feeding hopper into a detachable sand settling box cover 12, which facilitates the replacement and maintenance of the first rubber liner 15 inside the feeding hopper 11. Meanwhile, the first rubber liner 15 and the acid-resistant and wear-resistant rubber liner can respectively protect the feed hopper 11, the feed pipe 13 and the discharge bend 14 to prevent corrosion by acidic media.

[0067] like Figure 4 Figure 5 As shown, the belt feed chute 2 consists of a hopper 21, an upper buffer box 22, a lower buffer box 23, several intermediate feed chutes 24, and an end feed chute 25 connected in sequence. The specific number of intermediate feed chutes 24 is flexibly configured according to the feeding distance. Several intermediate feed chutes 25 are connected and positioned between the lower buffer box 23 and the end feed chute 25, with the end feed chute 25 connected to the hopper of the buffer feed bin 3. The lower buffer box 23, intermediate feed chutes 24, and end feed chutes 25 all have a thick bottom wall and thin side wall structure. Each intermediate feed chute 24 has a removable chute cover plate 241 on its top surface, which is connected by bolts. Compared to the traditional structure of a feed hopper plus conveying pipe (usually a plastic or iron pipe), the belt feed chute 2 provided in this embodiment firstly adds two buffer boxes below the feed hopper to provide initial buffering for the material; secondly, it adopts a segmented chute design, which is conducive to subsequent segmented maintenance and replacement, reducing material costs; finally, the chute cover plate 241 at the top of the intermediate feed chute 24 is designed to facilitate chute dredging and cleaning, solving the common problem of pipe blockage.

[0068] like Figure 6 Figure 7 As shown, the buffer feed bin 3 includes a hopper 31 and a feed bend 32 connected to its outlet. The top of the hopper 31 is designed with a removable cover plate 311, and the inner wall is provided with a second rubber liner 33. The second rubber liner 33 at its bottom has a concave-convex shape, which can enhance wear resistance and buffering effect. The inner wall of the feed bend 32 is lined with an acid-resistant and wear-resistant rubber liner. The second rubber liner 15 and the acid-resistant and wear-resistant rubber liner can respectively protect the buffer feed bin 3 and the feed bend 32 from acidic media corrosion.

[0069] like Figures 8 to 11As shown, the ball mill inlet 5 and outlet 7 are integrally formed by a stainless steel frame 51 and an anti-corrosion rubber layer 52, with the anti-corrosion rubber layer 52 sprayed onto the inner surface of the stainless steel frame. During manufacturing, the frame for the ball mill inlet 5 and outlet 7 is first welded from stainless steel. Then, the anti-corrosion rubber layer is sprayed onto the inner surface of the frame. After spraying, it undergoes vulcanization in a vulcanizing tank, transforming the unvulcanized anti-corrosion rubber layer (raw rubber) into a cured rubber with physical and mechanical properties and chemical stability, thereby improving the quality and acid and wear resistance of the ball mill inlet 5 and outlet 7. This embodiment uses an integrated stainless steel frame with an anti-corrosion rubber coating to manufacture the inlet 5 and outlet 7. Compared to traditional rubber-lined inlet and outlet structures, this method offers superior performance and quality, with better corrosion and abrasion resistance.

[0070] like Figures 12 to 18 As shown, the inner walls of the ball mill cylinder 6 and the inlet and outlet end caps are provided with three layers of acid-resistant and corrosion-resistant plates. The three layers of acid-resistant and corrosion-resistant plates include a rubber plate 61, a protective plate 62, and a rubber liner 63. The rubber plate 61 is tightly attached to the inner walls of the cylinder and the inlet and outlet end caps. The protective plate 62 is laid on the inner side of the rubber plate 61, and the rubber liner 63 is laid on the inner side of the protective plate 62. This arrangement from the outside to the inside forms a triple acid-resistant and corrosion-resistant protection for the cylinder, enabling the ball mill to adapt well to the ball milling and pre-leaching of acidic materials. The rubber sheet 61 is 6mm thick and is glued to the inner wall with acid-resistant adhesive. After the rubber sheet 61 is glued, a protective plate 62 is laid on its inner side. The protective plate 62 is 6mm thick and has the same length and width as the rubber sheet 61. The protective plate 62 is composed of a 3mm stainless steel plate and a 3mm vulcanized rubber layer. When laying it, the stainless steel plate side faces the rubber sheet 61. After the protective plate 62 is laid, a rubber lining plate 63 is laid on its inner side.

[0071] like Figure 17 As shown, the rubber plate 61, the protective plate 62, and the rubber liner 63 are all provided with corresponding bolt holes, which can be used for bolts to pass through. During the laying process, bolts can be used to pass through the rubber liner 63, the protective plate 62, the rubber plate 61 and the cylinder or the inlet / outlet end cover from the inside out, and finally lock and fix the three-layer acid-resistant and anti-corrosion plate to the cylinder or the inlet / outlet end cover.

[0072] like Figure 12 Figure 13 As shown, the top surface of the rubber liner 63 is provided with a raised lifting strip 64.

[0073] like Figures 14 to 15 As shown, the rubber liner 63 and the lifting strip 64 inside the ball mill cylinder 6 are integrally formed structures.

[0074] like Figure 16As shown, the rubber liner 63 laid inside the ball mill cylinder 6 has raised frames 631 around its bottom surface, and two bolt holes 632 are provided on the side away from the lifting bar 64. Raised rings 633 are provided on the outer edge of the bolt holes 632 on the same side as the raised frames 631, and the height of the raised rings 633 is the same as that of the raised frames 631. The raised frames 631 and raised rings 633 create a large-area groove structure on the bottom surface of the rubber liner 63. This groove structure provides a certain compression space between the rubber liner 63 and the guard plate 62 when they are connected, ensuring that the inner flatness of all rubber liners 63 is basically consistent after installation, thus guaranteeing the sealing performance of the installation.

[0075] like Figure 17 Figure 18 As shown, the rubber plate 61, guard plate 62, and rubber liner 63 laid on the inner wall of the ball mill cylinder 6 are connected to the inner wall of the cylinder by sealing bolts 65. The sealing bolt 65 includes a bolt 651, a sealing sleeve 652, a cup-shaped sealing ring 653, a cup-shaped washer 654, and a locking nut 655. The sealing sleeve 652 is made of acid-resistant rubber material, and its two ends are provided with outwardly extending annular pressing edges. When using this sealing bolt 65 for connection, the sealing sleeve 652 is first passed from the inside to the outside of the cylinder through the rubber liner 63, guard plate 62, rubber plate 61, and cylinder. At this time, the annular pressing edges at both ends of the sealing sleeve 652 can fit against the inner side of the rubber liner 63 and the outer side of the cylinder, respectively. Then, the bolt 651 is inserted into the sealing sleeve 652. After the bottom end of the bolt 651 extends out of the cylinder, the cup-shaped sealing ring 653 and the cup-shaped washer 654 are successively fitted on it, and then the locking nut 655 is screwed in to lock it. The sealing sleeve 652 effectively ensures the sealing of the bolt connection point, preventing leakage.

[0076] like Figure 19As shown, the rubber liner 63 and lifting strip 64 inside the inlet and outlet end covers of the ball mill 6 are separate structures. The rubber plate 61, guard plate 62, and rubber liner 63 inside the inlet and outlet end covers of the ball mill 6 are connected to the end cover by T-bolts 66. The bottom of the lifting strip 64 on the inlet and outlet end cover has a through groove 67 for the T-bolt 66 to pass through. The T-bolt 66 includes a bolt 651, a sealing sleeve 652, a cup-shaped sealing ring 653, a cup-shaped washer 654, and a locking nut 655. The sealing sleeve 652 is made of acid-resistant rubber material, and its two ends have outwardly extending annular pressing edges. When using the T-bolt 66 for connection, first pass the sealing sleeve 652 from the inside to the outside through the rubber liner 63, the protective plate 62, the rubber plate 61 and the end cap. At this time, the annular pressing edges at both ends of the sealing sleeve 652 can fit against the inner side of the rubber liner 63 and the outer side of the end cap, respectively. Then, insert the bolt 651 into the sealing sleeve 652. After the bottom end of the bolt 651 extends out of the cylinder, put the cup-shaped sealing ring 653 and the cup-shaped washer 654 on it in sequence, and then screw in the lock nut 655 to lock it.

[0077] like Figure 20 Figure 21 As shown, the cylindrical screen 8 includes a screen frame 81, a screen plate 82, and a guide plate 83. The screen plate 82 is bolted to the inner wall of the screen frame 81, and the guide plate 83 is bolted to the inner side of the screen plate 82. The screen frame 81 is integrally composited with a stainless steel skeleton and an anti-corrosion rubber layer, with the anti-corrosion rubber layer sprayed onto the inner surface of the stainless steel skeleton. During manufacturing, the skeleton of the screen frame is first welded from stainless steel, and then the anti-corrosion rubber layer is sprayed onto the inner surface of the skeleton. After spraying, it is vulcanized in a vulcanizing tank to transform the unvulcanized anti-corrosion rubber layer (raw rubber) into a cured rubber with physical and mechanical properties and chemical stability, forming an integrated rubber screen frame, which can significantly improve the quality and acid and wear resistance of the cylindrical screen. The screen plate 82 is made of acid-resistant and wear-resistant rubber material.

[0078] like Figures 21 to 23 As shown, a screen cover 9 is also provided on the outside of the screen frame 81. The inner wall of the screen cover 9 is lined with a 6mm thick rubber layer 91, and a third rubber liner 92 is laid on the bottom above the rubber layer 91. Specifically, the third rubber liner 92 is bolted to the inner wall of the bottom of the screen cover 9 to further enhance wear resistance and corrosion resistance.

[0079] This ball mill system, through its innovative feeding mechanism design, triple-sealed acid-resistant and corrosion-resistant layer on the cylinder, integrated composite design of key component steel structure and anti-corrosion rubber, and application of acid-resistant and wear-resistant materials, significantly improves the service life and operational stability of the entire ball mill equipment in acidic media environments, providing a scientific and effective solution for ball milling and pre-leaching of acidic materials. Simultaneously, its detachable and segmented design greatly facilitates equipment maintenance and replacement, reducing operating costs.

[0080] The present invention has been described in detail above through specific and preferred embodiments. However, those skilled in the art should understand that the present invention is not limited to the embodiments described above. Any modifications or equivalent substitutions made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An acid-resistant ball milling system, comprising a feeding mechanism, a ball mill (6), and a cylindrical screen (8), characterized in that: The feeding mechanism includes a sand feeding device (1), a belt feeding chute (2) and a buffer feeding bin (3). The outlets of the sand feeding device (1) and the belt feeding chute (2) are connected to the bin of the buffer feeding bin (3). The inner walls of the sand feeding device (1) and the buffer feeding bin (3) are provided with rubber liners. The chute of the belt feeding chute (2) has a structure with a thick bottom and thin side walls. The inner walls of the cylinder and the inlet and outlet end caps of the ball mill (6) are provided with three layers of acid-resistant and anti-corrosion plates; the inlet (5), outlet (7) and the screen frame (81) of the ball mill (6) are all made of stainless steel frame and anti-corrosion rubber layer in an integrated composite, and the anti-corrosion rubber layer is sprayed on the inner surface of the stainless steel frame.

2. The acid-resistant ball milling system according to claim 1, characterized in that: The three-layer acid-resistant and corrosion-resistant plate includes a rubber plate (61), a protective plate (62), and a rubber liner (63). The rubber plate (61) is in close contact with the inner wall of the cylinder and the inlet and outlet end caps. The protective plate (62) is laid on the inner side of the rubber plate (61), and the rubber liner (63) is laid on the inner side of the protective plate (62). The protective plate (62) is composed of a stainless steel plate and a vulcanized rubber layer, and the stainless steel plate side faces the rubber plate (61) when it is laid.

3. The acid-resistant ball milling system according to claim 2, characterized in that: The rubber plate (61) is bonded to the inner wall of the cylinder and the inlet and outlet end cap of the ball mill (6) with acid-resistant adhesive. Bolt holes are also provided on the rubber plate (61), the guard plate (62) and the rubber liner (63), which can be connected to the inner wall of the cylinder and the inlet and outlet end cap of the ball mill (6) by bolts.

4. An acid-resistant ball milling system according to any one of claims 2-3, characterized in that: The rubber liner (63) is provided with raised lifting strips (64), and the rubber liner (63) and lifting strips (64) laid on the inner wall of the ball mill (6) cylinder are integrally formed.

5. The acid-resistant ball milling system according to claim 4, characterized in that: The rubber plate (61), the guard plate (62) and the rubber liner (63) laid on the inner wall of the ball mill (6) are connected to the inner wall of the cylinder by sealing bolts (65). The sealing bolts (65) include bolts (651), sealing sleeves (652), cup-shaped sealing rings (653), cup-shaped washers (654) and locking nuts (655). The sealing sleeves (652) are made of acid-resistant rubber material and have outwardly extending annular pressing edges at both ends.

6. The acid-resistant ball milling system according to claim 5, characterized in that: The bottom of the rubber liner (63) laid on the inner wall of the ball mill (6) is provided with a raised frame (631) around the four sides, and a raised ring (633) is provided on the outer edge of the bolt hole (632) on the bottom surface. The raised ring (633) is at the same height as the raised frame (631).

7. An acid-resistant ball milling system according to any one of claims 1-3 or 5-6, characterized in that: The settling feeder (1) includes a feed hopper (11), and the top of the feed hopper (11) is provided with a detachable settling box cover (12).

8. The acid-resistant ball milling system according to claim 1, characterized in that: The belt feed chute (2) is composed of a hopper (21), an upper buffer box (22), a lower buffer box (23), several intermediate feed chutes (24) and an end feed chute (25) connected in sequence; the lower buffer box (23), several intermediate feed chutes (24) and the end feed chute (25) are all structures with thick bottom walls and thin side walls, and each intermediate feed chute (24) is provided with a detachable chute cover plate (241) on its top surface.

9. An acid-resistant ball milling system according to claim 1 or 8, characterized in that: The buffer feed hopper (3) includes a hopper (31), the top of the hopper (31) is provided with a detachable cover plate (311), and the second rubber liner (33) at the bottom of the hopper (31) is concave-convex.

10. The acid-resistant ball milling system according to claim 1, characterized in that: The screen frame (81) is also provided with a screen cover (9) on the outside. The inner wall of the screen cover (9) is lined with a rubber layer (91), and a third rubber liner (92) is laid on top of the rubber layer (91) at its bottom.

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