A grinding cylinder of a dry ball mill

Abstract

The utility model provides a kind of grinding cylinder of dry process ball mill belongs to ball mill technical field.Its structure includes: end cap is equipped in the both ends of grinding cylinder, respectively equipped with feed pipe and discharge pipe, several short protruding ribs and several long protruding ribs are equipped on end cap inner wall, short protruding rib and long protruding rib all extend along the radial direction of grinding cylinder, several short protruding ribs and several long protruding ribs are arranged mutually spaced, lining plate is fixedly connected on the inner wall of grinding cylinder, lining plate includes several fixed lining plate strip, flange is equipped on the both sides of the bottom of fixed lining plate strip, adjacent fixed lining plate strip and its flange jointly enclose insertion slot, movable lining plate strip is inserted in insertion slot, bolt penetrates the wall of grinding cylinder and flange and is tightly connected to movable lining plate strip.The utility model improves integral lining plate to lining plate strip plug-in structure, and local replacement can be carried out to wear position;Meanwhile, protruding rib is additionally arranged in end cap inside, and it plays the role of stirring to material at the end of grinding cylinder;In addition, the utility model uses multi-cylinder segment axial butt joint structure, which is convenient for installation and disassembly.

Description

Technical Field

[0001] This utility model relates to the field of ball mill technology, specifically to a grinding cylinder for a dry ball mill. Background Technology

[0002] Dry ball milling refers to the process of grinding materials using only grinding media (such as grinding balls) without the participation of solvents. Specifically, dry ball milling involves the material being impacted, squeezed, and rubbed by the high-speed movement of the grinding media within a ball mill, thereby achieving the crushing and grinding of the material. Dry ball milling technology is widely used for grinding dry materials such as ores and refractory materials.

[0003] In a typical dry ball mill structure, the main components include a cylindrical grinding cylinder, end caps, bearings, and a large transmission gear ring. The grinding cylinder, which is the space where the grinding process takes place, is the core component of the ball mill. The grinding cylinder is generally made of welded or riveted steel, with both ends closed and end caps made of cast iron. The inside of the grinding cylinder is equipped with stepped or corrugated liners to guide the movement of the steel balls and prevent wear on the cylinder wall. In existing technology, the end position of a conventional grinding cylinder has limited effect on the grinding balls, resulting in insufficient movement of the grinding balls at this position. This not only affects the local ball milling effect but also the uniformity of the overall ductile iron process. Furthermore, conventional liners are a one-piece structure; if local wear occurs, the entire liner needs to be replaced, making rapid localized maintenance difficult. Summary of the Invention

[0004] The first technical problem that this utility model aims to solve is: how to improve the effect of the grinding cylinder on the grinding balls.

[0005] The second technical problem to be solved by this utility model is: how to achieve rapid replacement of localized wear when the grinding cylinder liner is locally worn.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0007] A grinding cylinder for a dry ball mill includes a grinding cylinder, flanges, end caps, a feed pipe, a discharge pipe, short ribs, long ribs, liners, fixed liner strips, flanges, slots, and movable liner strips. The grinding cylinder comprises several cylinder sections, each with a flange at its end. The cylinder sections are joined end-to-end along the axial direction, and adjacent sections are fastened together by flanges, bolts, and nuts. End caps are located at both ends of the grinding cylinder; a feed pipe is located on one end cap, and a discharge pipe is located on the other end cap. The tube has several short and long protrusions on the inner wall of the end cap. Both the short and long protrusions extend radially along the grinding cylinder. The short and long protrusions are arranged at intervals. A liner is fixedly connected to the inner wall of the grinding cylinder. The liner includes several fixed liner strips. Flanges are provided on both sides of the bottom of the fixed liner strips. Adjacent fixed liner strips and their flanges together form a slot. The movable liner strip is inserted into the slot. Bolts pass through the cylinder wall and flanges of the grinding cylinder to securely connect the movable liner strip.

[0008] Preferably, the top of the movable lining strip is an arched wall, and the bottom surface of the movable lining strip is a flat surface.

[0009] Preferably, a groove is provided at the bottom of the flat part, and the groove is fastened to the movable liner strip by a number of U-bolts.

[0010] Preferably, a protrusion is provided between adjacent fixed liner strips, and the protrusion is inserted into the groove at the bottom of the movable liner strip.

[0011] Preferably, wing plates are provided on both sides of the trough, and the wing plates are in contact with the flanges.

[0012] Preferably, the cylindrical section includes two half-cylinder sections, left and right, with the left half-cylinder section and the right half-cylinder section being spliced ​​together by a pin head and a matching pin groove.

[0013] Preferably, the material of the liner is ZG20Cr9NiMo, ZGMn13Cr2 or ZG40CrMoNiRE.

[0014] In the above technical solution, the grinding cylinder is the main structure of this utility model, and can also be called the cylinder body; the flange is used to realize the end docking of each cylinder section. Based on this segmented design, it is easy to install and disassemble, and provides convenience for internal maintenance and liner replacement; the end cover is the end structure of the grinding cylinder, and the feed pipe and discharge pipe can be used for feeding and discharging materials; this utility model adds short and long protruding ridges that are spaced apart on the inner wall of the end cover. During the overall rotation of the grinding cylinder, the protruding ridges can play a pushing role on the material at both ends of the grinding cylinder; the liner is lined on the inner wall of the grinding cylinder, including fixed liner strips and movable liner strips arranged at intervals. Adjacent fixed liner strips form slots as the insertion space for movable liner strips. The flange at the bottom of the fixed liner strip is used to support the movable liner strip and also as the force point of the bolt, so that the bolt fixes the fixed liner strip while fixing the grinding cylinder and the movable liner strip.

[0015] This invention provides a grinding cylinder for a dry ball mill. The technical solution improves the integral liner to a liner strip insert structure, allowing for localized replacement of worn areas. Simultaneously, a protruding rib is added to the inner side of the end cover to guide the material at the end of the grinding cylinder. Furthermore, this invention adopts a multi-section axially connected structure, facilitating installation and disassembly, and providing convenience for internal maintenance and liner replacement. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention in a sectional state;

[0017] Figure 2 This is the first perspective view of the fixed liner strip and the movable liner strip in this utility model;

[0018] Figure 3 This is the second perspective view of the fixed liner strip and the movable liner strip in this utility model;

[0019] Figure 4 This is a perspective view of the movable lining strip in this utility model;

[0020] Figure 5 This is a perspective view of the movable liner strip and the groove in this utility model;

[0021] In the picture:

[0022] Detailed Implementation

[0023] The specific embodiments of this utility model will be described in detail below. To avoid excessive and unnecessary details, well-known structures or functions will not be described in detail in the following embodiments. The approximate language used in the following embodiments can be used for quantitative descriptions, indicating that a certain degree of variation in quantity is permissible without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art to which this utility model pertains.

[0024] Example 1

[0025] A grinding cylinder for a dry ball mill, such as Figures 1-5 As shown, the grinding cylinder includes a grinding cylinder 1, flange 2, end caps 3, feed pipe 4, discharge pipe 5, short rib 6, long rib 7, liner plate 8, fixed liner strip 9, flange 10, slot 11, and movable liner strip 12. The grinding cylinder 1 comprises several cylindrical sections, each with a flange 2 at its end. These sections are joined end-to-end along the axial direction, and adjacent sections are fastened together by flanges 2, bolts, and nuts. End caps 3 are located at both ends of the grinding cylinder 1. A feed pipe 4 is located on one end cap 3, and a discharge pipe 5 is located on the other end cap 3. The inner wall is provided with a number of short protrusions 6 and a number of long protrusions 7. Both the short protrusions 6 and the long protrusions 7 extend radially along the grinding cylinder 1. The short protrusions 6 and the long protrusions 7 are arranged at intervals. A liner plate 8 is fixedly connected to the inner wall of the grinding cylinder 1. The liner plate 8 includes a number of fixed liner strips 9. Flanges 10 are provided on both sides of the bottom of the fixed liner strips 9. Adjacent fixed liner strips 9 and their flanges 10 together form a slot 11. A movable liner strip 12 is inserted into the slot 11. Bolts pass through the cylinder wall and flanges 10 of the grinding cylinder 1 to fasten the movable liner strip 12.

[0026] In the above technical solution, the grinding cylinder 1 is the main structure of this utility model, and can also be called the cylinder body; the flange 2 is used to realize the end docking of each cylinder section. Based on this segmented design, it is easy to install and disassemble, and provides convenience for internal maintenance and replacement of the liner plate 8; the end cover 3 is the end structure of the grinding cylinder 1, and the feed pipe 4 and the discharge pipe 5 can be used for feeding and discharging materials; this utility model adds short protruding ribs 6 and long protruding ribs 7 that are spaced apart on the inner wall of the end cover 3. During the overall rotation of the grinding cylinder 1, the protruding ribs can play a pushing role on the material at both ends of the grinding cylinder 1; the liner plate 8 is lined on the inner wall of the grinding cylinder 1, including fixed liner plate strips 9 and movable liner plate strips 12 arranged at intervals. Adjacent fixed liner plate strips 9 form slots 11, which serve as the insertion space for the movable liner plate strips 12. The flange 10 at the bottom of the fixed liner plate strip 9 is used to support the movable liner plate strip 12 and also as the force point of the bolt, so that the bolt fixes the fixed liner plate strip 9 at the same time as fixing the grinding cylinder 1 and the movable liner plate strip 12.

[0027] Example 2

[0028] A grinding cylinder for a dry ball mill, such as Figures 1-5 As shown, the grinding cylinder includes a grinding cylinder 1, flange 2, end caps 3, feed pipe 4, discharge pipe 5, short rib 6, long rib 7, liner plate 8, fixed liner strip 9, flange 10, slot 11, and movable liner strip 12. The grinding cylinder 1 comprises several cylindrical sections, each with a flange 2 at its end. These sections are joined end-to-end along the axial direction, and adjacent sections are fastened together by flanges 2, bolts, and nuts. End caps 3 are located at both ends of the grinding cylinder 1. A feed pipe 4 is located on one end cap 3, and a discharge pipe 5 is located on the other end cap 3. The inner wall is provided with several short protruding ribs 6 and several long protruding ribs 7, both of which extend radially along the grinding cylinder 1. The short protruding ribs 6 and several long protruding ribs 7 are arranged at intervals. A liner plate 8 is fixedly connected to the inner wall of the grinding cylinder 1. The liner plate 8 includes several fixed liner strips 9. Flanges 10 are provided on both sides of the bottom of the fixed liner strips 9. Adjacent fixed liner strips 9 and their flanges 10 together form a slot 11. A movable liner strip 12 is inserted into the slot 11. Bolts pass through the cylinder wall of the grinding cylinder 1 and the flanges 10 to fasten the movable liner strip 12. The top of the movable liner strip 12 is an arched wall 13, and the bottom surface of the movable liner strip 12 is a flat part 14. A groove 16 is provided at the bottom of the flat part 14. The groove 16 is fastened to the movable liner strip 12 by several U-bolts 15. A protruding strip is provided between adjacent fixed liner strips 9, and the protruding strip is inserted into the groove 16 at the bottom of the movable liner strip 12. Flanges 17 are provided on both sides of the groove 16, and the flanges 17 are in contact with the flanges 10. The cylindrical section includes two half-cylinder sections, left and right, which are connected to each other by pins 18 and matching pin slots. The liner 8 is made of ZG20Cr9NiMo, ZGMn13Cr2, or ZG40CrMoNiRE.

[0029] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of this utility model application should be included within the protection scope of this utility model.

Claims

1. A grinding cylinder for a dry ball mill, characterized in that... The grinding cylinder (1) includes a grinding cylinder (1), a flange (2), an end cap (3), a feed pipe (4), a discharge pipe (5), a short rib (6), a long rib (7), a liner (8), a fixed liner strip (9), a flange (10), a slot (11), and a movable liner strip (12). The grinding cylinder (1) comprises several cylindrical sections, with flanges (2) at the ends of each section. These sections are joined end-to-end along the axial direction, and adjacent sections are fastened together by flanges (2) and bolts and nuts. End caps (3) are located at both ends of the grinding cylinder (1). A feed pipe (4) is located on one end cap (3), and a discharge pipe (5) is located on the other end cap (3). The inner wall is provided with several short protrusions (6) and several long protrusions (7). Both the short protrusions (6) and the long protrusions (7) extend radially along the grinding cylinder (1). The short protrusions (6) and the long protrusions (7) are arranged at intervals. A liner (8) is fixedly connected to the inner wall of the grinding cylinder (1). The liner (8) includes several fixed liner strips (9). Flanges (10) are provided on both sides of the bottom of the fixed liner strips (9). The adjacent fixed liner strips (9) and their flanges (10) together form a slot (11). The movable liner strip (12) is inserted into the slot (11). Bolts pass through the cylinder wall and flanges (10) of the grinding cylinder (1) to fasten the movable liner strip (12).

2. The grinding cylinder of a dry ball mill according to claim 1, characterized in that, The top of the movable lining strip (12) is an arched wall (13), and the bottom surface of the movable lining strip (12) is a flat part (14).

3. The grinding cylinder of a dry ball mill according to claim 2, characterized in that, A groove (16) is provided at the bottom of the flat part (14), and the groove (16) is fastened to the movable liner strip (12) by a number of U bolts (15).

4. The grinding cylinder of a dry ball mill according to claim 3, characterized in that, A protrusion is provided between adjacent fixed liner strips (9), and the protrusion is inserted into the groove (16) at the bottom of the movable liner strip (12).

5. The grinding cylinder of a dry ball mill according to claim 4, characterized in that, Wings (17) are provided on both sides of the trough (16), and the wings (17) and the flanges (10) fit together.

6. The grinding cylinder of a dry ball mill according to claim 1, characterized in that, The cylinder section includes two half-cylinder sections, left and right. The left half-cylinder section and the right half-cylinder section are connected to each other by a pin (18) and a matching pin groove.

7. The grinding cylinder of a dry ball mill according to claim 1, characterized in that, The material of the liner (8) is ZG20Cr9NiMo, ZGMn13Cr2 or ZG40CrMoNiRE.

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