Ball mill high-chrome cast iron liner plate with wear-resistant boss

Abstract

The utility model belongs to the technical field of ball mill, specifically is a kind of ball mill high-chromium cast iron lining plate with wear-resistant boss, including lining plate base plate, the middle part of lining plate base plate side wall is fixed with multiple boss body, multiple boss body is arranged on the lining plate base plate side wall in linear array rule, the middle part of lining plate base plate side wall is equipped with multiple bolt holes, the number of lining plate base plate can be increased or reduced to adapt to different diameter, different length ball mill barrel, without opening mould for each equipment separately, reduce mould cost, and for conical barrel, variable-diameter barrel and other non-standard structures, the angle and size of single lining plate base plate can be adjusted to realize splicing and fitting, adapt to special-shaped barrel, shorten construction period, meanwhile, ball mill shutdown and replacement lining plate can directly affect productivity, can be spliced design supports "local quick replacement", only need to remove the fixed bolt of worn module, without disassembling surrounding unworn module, reduce downtime loss.

Description

Technical Field

[0001] This utility model belongs to the field of ball mill technology, specifically a high-chromium cast iron liner for ball mills with wear-resistant bosses. Background Technology

[0002] A ball mill is a core industrial equipment that uses the impact and grinding action of grinding media (such as steel balls, steel segments, ceramic balls, etc.) to crush blocky and granular materials into fine or ultrafine powder. It is widely used in mining, building materials, chemical, metallurgy, power and other fields.

[0003] When a ball mill is working, the grinding media inside the cylinder will generate violent impacts as the cylinder rotates, and at the same time, high-intensity friction will occur between the grinding media and the cylinder wall. In addition, the materials themselves (such as ore and clinker) will also cause wear or corrosion to the cylinder wall. High-chromium cast iron liners, with their extremely high hardness and wear resistance, are fixed to the inner wall of the cylinder with bolts. They can directly "bear" the impact and friction between the grinding media and the materials, providing "physical isolation protection" for the cylinder steel plate and extending the service life of the ball mill body.

[0004] Through long-term use and observation, it was found that when installing high-chromium cast iron liners with wear-resistant bosses inside the ball mill, improper installation will accelerate the wear or cracking of the liners themselves, and significantly shorten their service life.

[0005] Therefore, this utility model provides a high-chromium cast iron liner for ball mills with wear-resistant bosses. Utility Model Content

[0006] To overcome the shortcomings of the prior art and solve at least one of the problems mentioned in the background art, a high-chromium cast iron liner for ball mills with wear-resistant bosses is proposed.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A high-chromium cast iron liner plate for a ball mill with wear-resistant bosses, comprising a liner plate base, a plurality of boss bodies fixedly connected to the middle of the side wall of the liner plate base, the plurality of boss bodies being arranged in a linear array on the side wall of the liner plate base, a plurality of bolt holes being opened in the middle of the side wall of the liner plate base, fixing bolts being threadedly connected to the middle of the inner side wall of the bolt holes, a splicing assembly being provided in the middle of the side wall of the liner plate base, the splicing assembly being able to splice multiple sets of liner plates into a shape tightly fitting the inner wall of the ball mill, a material guiding assembly being opened in the middle of the side wall of the liner plate base, the material guiding assembly being able to guide the flow of material embedded in the gaps of the liner plate base, the splicing assembly including a first fixing block, the first fixing block being fixedly connected to the side wall of the liner plate base, a pair of first connecting pieces being fixed in the middle of the side wall of the first fixing block, a second fixing block being fixedly connected to the middle of the side wall of the second fixing block, and a pair of second connecting pieces being fixed in the middle of the side wall of the second fixing block. The second connecting piece is correspondingly arranged with the first connecting piece. A third fixing block is fixedly connected to the middle of the side wall of the liner substrate. A pair of third connecting pieces are fixedly fixed to the middle of the side wall of the third fixing block. A fourth fixing block is fixedly connected to the middle of the side wall of the liner substrate. A pair of fourth connecting pieces are fixedly fixed to the middle of the side wall of the fourth fixing block. The fourth connecting pieces are correspondingly arranged with the third connecting pieces. The first, second, third, and fourth connecting pieces are all made of deformable material. This step can adapt to ball mill cylinders of different diameters and lengths by increasing or decreasing the number of liner substrates. There is no need to open molds for each machine separately, which reduces mold costs. For non-standard structures such as conical cylinders and variable diameter cylinders, splicing and fitting can be achieved by adjusting the angle and size of a single liner substrate to adapt to irregular cylinders and shorten the construction period. At the same time, the ball mill shutdown for liner replacement will directly affect the production capacity. The splicing design supports "partial quick replacement". Only the fixing bolts of the worn module need to be removed. There is no need to disassemble the surrounding unworn modules, reducing downtime losses.

[0008] Preferably, a first sealing gasket is fixed to the middle of the side wall of the first connecting piece, a second sealing gasket is fixed to the middle of the side wall of the second connecting piece, a third sealing gasket is fixed to the middle of the side wall of the third connecting piece, and a fourth sealing gasket is fixed to the middle of the side wall of the fourth connecting piece. The first, second, third, and fourth sealing gaskets are all made of elastic material. This step, by setting the first, second, third, and fourth sealing gaskets, can prevent materials from entering the gap between the liner and the inner wall of the ball mill cylinder, prevent wear on the back of the liner, extend the service life of the cylinder wall, and if fine particles are stuck in the splicing gap, they will repeatedly rub against the edge of the gap with the vibration of the liner, causing gaps and chipping at the splicing of the liner. The first, second, third, and fourth sealing gaskets can buffer the impact of materials through their own elasticity, while blocking the entry of fine materials and reducing the wear rate at the splicing of the liner.

[0009] Preferably, the material guiding assembly includes multiple material guiding grooves, which are formed on the side wall of the liner substrate and located between adjacent boss bodies. The material guiding grooves have an arc-shaped structure. This step, by setting the material guiding grooves, can evenly disperse the material on the entire working surface of the liner, improve the material coverage, reduce local under-grinding or over-grinding, and improve the finished product qualification rate. At the same time, the "recessed structure" of the arc-shaped material guiding groove can form a certain resistance to the material. When the cylinder rotates, the material enters the material guiding groove and slides slowly along the arc surface instead of sliding down quickly with the liner, which prolongs the "residence time" of the material in the grinding area, increases the number of times the material contacts the grinding media, and makes the grinding more thorough.

[0010] Preferably, a guide plate is installed between adjacent liner substrates. The guide plate has an arc-shaped structure. This step, by setting the guide plate with an arc-shaped structure, can guide the material to flow smoothly along the cylinder wall, guide the stagnant material to the effective working area of ​​the grinding media, so that the material has more sufficient contact with the grinding media and the impact is more uniform, thereby further improving the finished product qualification rate and grinding efficiency.

[0011] Preferably, a washer is slidably fitted in the middle of the side wall of the fixing bolt. The washer is made of elastic material. This step, by setting a washer with elastic deformation capability, can continuously maintain the "pre-tightening compensation force" on the fixing bolt during vibration. When vibration causes a small gap to appear in the thread pair, the rebound of the washer will quickly fill the gap, maintain the pre-tightening force of the fixing bolt, prevent the fixing bolt from loosening at the source, and reduce failures such as liner displacement and cylinder leakage caused by the loosening of the fixing bolt.

[0012] Preferably, the surface of the boss body is coated with a wear-resistant and anti-corrosion coating. This step, by spraying a wear-resistant and anti-corrosion coating on the outside of the boss body, can enhance the wear resistance of the boss body, resist extreme erosion and impact, and reduce the wear rate of the liner.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The high-chromium cast iron liner plate for ball mills with wear-resistant bosses described in this utility model can adapt to ball mill cylinders of different diameters and lengths by increasing or decreasing the number of liner plate substrates. This eliminates the need for separate molds for each machine, reducing mold costs. Furthermore, for non-standard structures such as conical cylinders and variable-diameter cylinders, splicing and fitting can be achieved by adjusting the angle and size of individual liner plate substrates, adapting to irregularly shaped cylinders and shortening the construction period. At the same time, ball mill shutdown for liner replacement directly affects production capacity. The splicing design supports "partial quick replacement," requiring only the removal of the fixing bolts of the worn module without disassembling the surrounding unworn modules, reducing downtime losses.

[0015] 2. The high-chromium cast iron liner for a ball mill with wear-resistant bosses described in this utility model, by setting a first sealing gasket, a second sealing gasket, a third sealing gasket, and a fourth sealing gasket, can prevent materials from entering the gap between the liner and the inner wall of the ball mill cylinder, prevent wear on the back of the liner, extend the service life of the cylinder wall, and if fine particles are stuck in the splicing gap, they will repeatedly rub against the edge of the gap with the vibration of the liner, causing gaps and chipping at the splice of the liner. The first sealing gasket, the second sealing gasket, the third sealing gasket, and the fourth sealing gasket can buffer the impact of materials through their own elasticity, while blocking the entry of fine materials and reducing the wear rate at the splice of the liner. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a schematic diagram of the mating structure of the liner plate, substrate, and guide groove in this utility model;

[0019] Figure 3 This is a schematic diagram of the mating structure of the liner plate, the base plate, and the fixing block in this utility model;

[0020] Figure 4 This is a schematic diagram of the mating structure of the gasket and the fixing bolt in this utility model;

[0021] Figure 5 This is a schematic diagram of the cooperation structure between the fixing block and the connecting piece in this utility model.

[0022] Legend:

[0023] 1. Liner base plate; 11. Boss body; 12. Bolt hole; 13. Fixing bolt; 2. First fixing block; 21. First connecting piece; 22. Second fixing block; 23. Second connecting piece; 24. Third fixing block; 25. Third connecting piece; 26. Fourth fixing block; 27. Fourth connecting piece; 3. First sealing gasket; 31. Second sealing gasket; 32. Third sealing gasket; 33. Fourth sealing gasket; 4. Guide groove; 5. Guide plate; 6. Gasket. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Specific implementation examples are given below.

[0026] like Figures 1 to 5 As shown in the figure, a high-chromium cast iron liner plate for a ball mill with wear-resistant bosses according to an embodiment of the present invention includes a liner plate base 1. Multiple boss bodies 11 are fixedly connected to the center of the side wall of the liner plate base 1. The multiple boss bodies 11 are arranged in a linear array on the side wall of the liner plate base 1. Multiple bolt holes 12 are opened in the center of the side wall of the liner plate base 1. Fixing bolts 13 are threadedly connected to the center of the inner side wall of the bolt holes 12. A splicing assembly is provided in the center of the side wall of the liner plate base 1. This splicing assembly can splice multiple sets of liner plates 1 into a shape that fits tightly against the inner wall of the ball mill. A material guiding assembly is opened in the center of the side wall of the liner plate base 1. This material guiding assembly can guide the material embedded in the seams of the liner plate base 1. During ball mill assembly, installers attach multiple sets of liner substrates 1 to the inner wall of the ball mill and use splicing components to splice them together, so that the multiple sets of liner substrates 1 are tightly attached to the shape of the inner wall of the ball mill. Then, multiple fixing bolts 13 are screwed into the corresponding bolt holes 12 to fix the liner substrates 1 to the ball mill. When the ball mill is used for grinding, the multiple protrusions 11 on the liner substrates 1 will impact and grind the material. The material that falls on the surface of the liner substrates 1 will fall to the bottom of the ball mill under the guidance of the material guiding components. Then, the workers will take out and collect the ground material from inside the ball mill.

[0027] like Figures 1 to 5As shown, the splicing assembly includes a first fixing block 2, which is fixed to the side wall of the substrate 1. A pair of first connecting pieces 21 are fixed to the middle of the side wall of the first fixing block 2. A second fixing block 22 is fixed to the middle of the side wall of the substrate 1. A pair of second connecting pieces 23 are fixed to the middle of the side wall of the second fixing block 22. The second connecting pieces 23 and the first connecting pieces 21 are correspondingly arranged. A third fixing block 24 is fixed to the middle of the side wall of the substrate 1. A pair of third connecting pieces 25 are fixed to the middle of the side wall of the third fixing block 24. A fourth fixing block 26 is fixed to the middle of the side wall of the substrate 1. A pair of fourth connecting pieces 27 are fixed to the middle of the side wall of the fourth fixing block 26. The fourth connecting pieces 27 and the third connecting pieces 25 are correspondingly arranged. The first connecting piece 21, the second connecting piece 23, the third connecting piece 25 and the fourth connecting piece 27 are all made of deformable material. Because the second connecting piece 23 and the first connecting piece 21 are correspondingly arranged, and the fourth connecting piece 27 and the third connecting piece 25 are correspondingly arranged, the installer can connect the fourth connecting piece 27 to the first connecting piece 21 on the side wall of the substrate 1 by pressing the first connecting piece 26 on the side wall of the substrate 1. The second connecting piece 23 is attached to the first connecting piece 21 on the side wall of another set of liner substrate 1. Then, the fourth connecting piece 27 on the side wall of this set of liner substrate 1 is attached to the third connecting piece 25 on the side wall of another set of liner substrate 1. At this time, multiple sets of liner substrate 1 can be spliced ​​together. Because the first connecting piece 21, the second connecting piece 23, the third connecting piece 25 and the fourth connecting piece 27 are all deformable materials, multiple sets of liner substrate 1 can be adjusted according to the inner wall of the ball mill. This step can adapt to ball mill cylinders of different diameters and lengths by increasing or decreasing the number of liner substrate 1. There is no need to open molds for each machine separately, which reduces mold costs. For non-standard structures such as conical cylinders and variable diameter cylinders, splicing and fitting can be achieved by adjusting the angle and size of a single liner substrate 1 to adapt to irregular cylinders and shorten the construction period. At the same time, the ball mill shutdown for liner replacement will directly affect the production capacity. The splicing design supports "partial quick replacement". Only the fixing bolts 13 of the worn module need to be removed. There is no need to disassemble the surrounding unworn modules, which reduces downtime losses.

[0028] like Figures 1 to 5As shown, a first sealing gasket 3 is fixed to the middle of the side wall of the first connecting piece 21, a second sealing gasket 31 is fixed to the middle of the side wall of the second connecting piece 23, a third sealing gasket 32 ​​is fixed to the middle of the side wall of the third connecting piece 25, and a fourth sealing gasket 33 is fixed to the middle of the side wall of the fourth connecting piece 27. The first sealing gasket 3, the second sealing gasket 31, the third sealing gasket 32, and the fourth sealing gasket 33 are all made of elastic material. This step, by setting the first sealing gasket 3, the second sealing gasket 31, the third sealing gasket 32, and the fourth sealing gasket 33, can prevent materials from entering the gap between the liner and the inner wall of the ball mill cylinder, prevent wear on the back of the liner, and extend the service life of the cylinder wall. If fine particles are stuck in the splicing gap, they will repeatedly rub against the edge of the gap with the vibration of the liner, causing gaps and chipping at the splicing of the liner. The first sealing gasket 3, the second sealing gasket 31, the third sealing gasket 32, and the fourth sealing gasket 33 can buffer the impact of materials through their own elasticity, while blocking the entry of fine materials and reducing the wear rate at the splicing of the liner.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the material guiding assembly includes multiple material guiding grooves 4, which are formed on the side wall of the liner substrate 1. The material guiding grooves 4 are located between adjacent boss bodies 11. The material guiding grooves 4 have an arc-shaped structure. When the material to be ground falls onto the side wall of the liner substrate 1 and is impacted and ground by the multiple boss bodies 11, some of the material will be embedded in the gap between adjacent boss bodies 11. At this time, the material guiding grooves 4 will guide the flow of the material, so that it can be fully ground. This step, by setting the material guiding grooves 4, can evenly disperse the material on the entire working surface of the liner, improve the material coverage, reduce the situation of local under-grinding or over-grinding, and improve the finished product qualification rate. At the same time, the "recessed structure" of the arc-shaped material guiding grooves 4 can form a certain obstruction for the material. When the cylinder rotates, the material enters the material guiding grooves 4 and will slide slowly along the arc surface instead of sliding down quickly with the liner, which prolongs the "residence time" of the material in the grinding area, increases the number of times the material contacts the grinding medium, and makes the grinding more thorough.

[0030] like Figure 1 and Figure 2 As shown, a guide plate 5 is installed between adjacent liner substrates 1. The guide plate 5 has an arc-shaped structure. After multiple sets of liner substrates 1 are spliced ​​together, the installer fixes the guide plate 5 between adjacent liner substrates 1. At this time, the arc-shaped guide plate 5 will guide the material flow. This step, by setting the arc-shaped guide plate 5, can guide the material to flow smoothly along the cylinder wall, guide the stagnant material to the effective working area of ​​the grinding media, so that the material has more sufficient contact with the grinding media and the impact is more uniform, further improving the finished product qualification rate and grinding efficiency.

[0031] like Figure 4As shown, a washer 6 is slidably fitted in the middle of the side wall of the fixing bolt 13. The washer 6 is made of elastic material. By setting the washer 6 with elastic deformation capability, this step can continuously maintain the "pre-tightening compensation force" on the fixing bolt 13 during vibration. When vibration causes a small gap to appear in the threaded pair, the rebound of the washer 6 will quickly fill the gap, maintain the pre-tightening force of the fixing bolt 13, prevent the fixing bolt 13 from loosening from the root, and reduce failures such as liner displacement and cylinder leakage caused by the loosening of the fixing bolt 13.

[0032] like Figures 1 to 5 As shown, the surface of the boss body 11 is coated with a wear-resistant and anti-corrosion coating. This step, by spraying a wear-resistant and anti-corrosion coating on the outside of the boss body 11, can enhance the wear resistance of the boss body 11, resist extreme erosion and impact, and reduce the wear rate of the liner.

[0033] Working principle: During ball mill assembly, installers attach multiple sets of liner base plates 1 to the inner wall of the ball mill and use splicing components to assemble them, ensuring the multiple sets of liner base plates 1 fit tightly into the shape of the inner wall of the ball mill. Then, multiple fixing bolts 13 are screwed into the corresponding bolt holes 12 to fix the liner base plates 1 to the ball mill. When the ball mill is used for grinding, the multiple protrusions 11 on the liner base plates 1 impact and grind the material. Material falling onto the surface of the liner base plates 1 is guided by the material guiding component to fall to the bottom of the ball mill. The ground material is then removed and collected from inside the ball mill. Because the second connecting piece 23 corresponds to the first connecting piece 21, and the fourth connecting piece 27 corresponds to the third connecting piece 25, the installers connect the second connecting piece 23 on the side wall of one set of liner base plates 1 to another set of liner base plates 1. The first connecting piece 21 on the side wall of the substrate 1 is attached, and then the fourth connecting piece 27 on the side wall of the substrate 1 and the third connecting piece 25 on the side wall of another substrate 1 are attached. At this time, multiple substrates 1 can be spliced ​​together. Because the first connecting piece 21, the second connecting piece 23, the third connecting piece 25 and the fourth connecting piece 27 are all deformable materials, multiple substrates 1 can be adjusted according to the inner wall of the ball mill. When the material to be ground falls on the side wall of the substrate 1 and is impacted and ground by multiple boss bodies 11, some material will be embedded in the gap between adjacent boss bodies 11. At this time, the guide groove 4 will guide the flow of the material so that it can be fully ground. After multiple substrates 1 are spliced ​​together, the installer fixes the guide plate 5 between adjacent substrates 1. At this time, the arc-shaped guide plate 5 will guide the flow of the material.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-chromium cast iron liner for a ball mill with wear-resistant bosses, comprising a liner substrate (1), characterized in that: The liner substrate (1) has multiple boss bodies (11) fixedly connected to the middle of its side wall. The multiple boss bodies (11) are arranged in a linear array on the side wall of the liner substrate (1). The liner substrate (1) has multiple bolt holes (12) in the middle of its side wall. The bolt holes (12) are threaded with fixing bolts (13) in the middle of their inner side walls. The liner substrate (1) has a splicing assembly in the middle of its side wall. This splicing assembly can splice multiple liner substrates (1) into a shape that fits tightly against the inner wall of the ball mill. The liner substrate (1) has a material guiding assembly in the middle of its side wall. This material guiding assembly can guide the flow of material embedded in the gaps of the liner substrate (1).

2. The high-chromium cast iron liner for a ball mill with wear-resistant bosses according to claim 1, characterized in that: The splicing assembly includes a first fixing block (2), which is fixed to the side wall of the substrate (1). A pair of first connecting pieces (21) are fixed in the middle of the side wall of the first fixing block (2). A second fixing block (22) is fixed in the middle of the side wall of the substrate (1). A pair of second connecting pieces (23) are fixed in the middle of the side wall of the second fixing block (22). The second connecting pieces (23) and the first connecting pieces (21) are correspondingly arranged. A pair of first connecting pieces (23) are fixed in the middle of the side wall of the substrate (1). Three fixing blocks (24), a pair of third connecting pieces (25) are fixed in the middle of the side wall of the third fixing block (24), a fourth fixing block (26) is fixed in the middle of the side wall of the substrate (1), a pair of fourth connecting pieces (27) are fixed in the middle of the side wall of the fourth fixing block (26), the fourth connecting pieces (27) and the third connecting pieces (25) are arranged correspondingly, and the first connecting piece (21), the second connecting piece (23), the third connecting piece (25) and the fourth connecting piece (27) are all made of deformable material.

3. A high-chromium cast iron liner for a ball mill with wear-resistant bosses according to claim 2, characterized in that: The first connecting piece (21) has a first sealing gasket (3) fixed in the middle of its side wall, the second connecting piece (23) has a second sealing gasket (31) fixed in the middle of its side wall, the third connecting piece (25) has a third sealing gasket (32) fixed in the middle of its side wall, and the fourth connecting piece (27) has a fourth sealing gasket (33) fixed in the middle of its side wall. The first sealing gasket (3), the second sealing gasket (31), the third sealing gasket (32) and the fourth sealing gasket (33) are all made of elastic material.

4. The high-chromium cast iron liner for a ball mill with wear-resistant bosses according to claim 1, characterized in that: The material guiding assembly includes multiple material guiding grooves (4), which are opened on the side wall of the liner substrate (1). The material guiding grooves (4) are located between adjacent boss bodies (11) and have an arc-shaped structure.

5. A high-chromium cast iron liner for a ball mill with wear-resistant bosses according to claim 4, characterized in that: A guide plate (5) is installed between adjacent substrates (1), and the guide plate (5) has an arc-shaped structure.

6. A high-chromium cast iron liner for a ball mill with wear-resistant bosses according to claim 1, characterized in that: A washer (6) is slidably fitted in the middle of the side wall of the fixing bolt (13), and the washer (6) is made of elastic material.

7. A high-chromium cast iron liner for a ball mill with wear-resistant bosses according to claim 4, characterized in that: The surface of the boss body (11) is covered with a wear-resistant and corrosion-resistant coating.

Images