Center disc lining plate of efficient quality-improving lattice type ball mill

Abstract

The utility model discloses a central disc lining plate of an efficient quality-improving grid type ball mill, which comprises an inner ring ball mill grid plate, grid plate screw holes, a grid plate pressing plate, grid plate flow guide holes and grid plate extension part pressing blocks, a grid plate cover plate is cast on the front surface of the inner ring ball mill grid plate, and the grid plate pressing plate is cast on the back surface of the inner ring ball mill grid plate; a grid plate fixing flat head bolt is assembled on the edge of one side of the grid plate cover plate, so that the grid plate cover plate is matched and connected with the grid plate pressing plate; a grid plate screw hole is formed in the edge of one side of the grid plate pressing plate and used for installation of the center disc grid lining plate. On the basis of keeping the structural form of the discharging end cover of the existing grid type ball mill, the grid plate and the central lining plate are optimally designed, and the discharging area of the grid plate is enlarged, so that the service life of the base is prolonged, and the discharging efficiency of the ball mill is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of ball mill technology, specifically to a center plate liner for a high-efficiency, high-quality grid-type ball mill. Background Technology

[0002] The grate ball mill is a key piece of equipment for crushing and grinding materials after they have been crushed. It is widely used in the production of cement, silicate products, new building materials, refractory materials, fertilizers, ferrous and non-ferrous metal ore beneficiation, and glass and ceramics.

[0003] The grate-type ball mill houses the main bearing housing, discharge hopper, and discharge screen within the hollow shaft journal-equipped end cover at the discharge end. The normal discharge end cover consists of a central liner, grate liners, and scoop-shaped liners. Several radial ribs are cast into the inner wall of the end cover, dividing it into several sector-shaped chambers. A scoop-shaped liner is installed in each sector and secured to the end cover with screws. Then, grate liners are installed on each sector formed by the scoop liners. There are two structural forms for the grate liners: one consists of two pieces joined together and pressed together by wedges, which are then secured to the end cover with screws passing through the ribs. The central portion is supported by a stop on the central liner to prevent tilting and detachment; the other consists of two pieces joined together and directly secured with screws. The central liner is star-shaped and consists of two pieces fixed to the ribs with screws.

[0004] Material enters the interior of the grate-type ball mill through the feeding section, and the interior contains grinding media of a specific shape and size. As the ball mill rotates, the grinding media, under the influence of centrifugal force and friction with the liner surface of the inner wall of the mill, adhere to the liner surface and rotate with the mill, being carried to a certain height. Under gravity, they fall freely, impacting and crushing the material at the bottom like projectiles. This rising and falling motion of the grinding media is a continuous cycle. Additionally, during the rotation of the ball mill, the media inside also experience sliding and rolling phenomena, resulting in friction between the grinding media, the liner, and the material, thus achieving the grinding process.

[0005] With continuous material feeding, the material level difference between the feed and discharge ends forces the material to flow. The axial thrust generated by the falling grinding media also forces the material to flow. At the same time, the airflow inside the ball mill also helps the material flow until it reaches the grate plate and passes through the discharge guide hole at the top of the grate plate, and is discharged to the ball mill discharge screen. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a high-efficiency, high-quality grid-type ball mill center plate liner. This solves the problem in existing technologies where the continuous grinding of materials within the ball mill cylinder and the ball's cascading motion constantly impact the center plate at the discharge end cover. Conventional center plates, secured with screws or wedges, often detach after half their lifespan, leading to severe ball slippage. This invention also addresses the issues of short service life and low discharge efficiency of existing ball mill discharge end center plates.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a center disc liner for a high-efficiency, high-quality-improving grate-type ball mill, comprising an inner ring ball mill grate plate, grate plate screw holes, grate plate pressure plate, grate plate guide holes, and grate plate extension pressure block.

[0010] The inner ring of the ball mill grid plate has a grid plate cover plate cast in front and a grid plate pressure plate cast on the back.

[0011] One edge of the grating cover plate is fitted with a grating fixing flat head bolt to achieve a mating connection with the grating pressure plate; one edge of the grating pressure plate is fitted with a grating screw hole for the installation of the central plate grating liner; the size of the grating screw hole and the grating fixing flat head bolt are matched; by passing the grating fixing flat head bolt through the grating screw hole, the grating pressure plate and the grating cover plate are tightly fitted together;

[0012] The inner ring ball mill grid plate is fixed to the discharge end cover of the grid-type ball mill by grid plate fixing flat head bolts;

[0013] The lower end of the inner ring ball mill grid plate is provided with a grid plate extension, which is located in the central disk of the grid-type ball mill, thereby expanding the discharge area of ​​the grid plate;

[0014] The grate plate guide holes are regularly distributed on the inner ring ball mill grate plate and the grate plate extension to accelerate the output rate;

[0015] The lattice extension pressing block is fitted into the gap between the lattice pressing plate and the lattice cover plate during assembly.

[0016] Preferably, the grid plate extension pressure block is a side-covered rubber, and its back is fitted with a pressure block back rubber sponge pad. The pressure block back rubber sponge pad is located at the end of the liner plate and is in direct contact with the ball mill cylinder and end cover.

[0017] Preferably, the inner ring ball mill grid plate has a fan-shaped structure and is made of wear-resistant layer or wear-resistant metal integral casting to ensure that it is smooth and seamless; the grid plate is fixed to the discharge end cover of the grid-type ball mill by fixing flat head bolts, which facilitates the discharge of the ground material.

[0018] Preferably, the screw holes of the grid plate are assembly holes that are not closed at one end, and their function is to realize the mutual installation between the inner ring ball mill grid plates and the connection with the discharge end cover.

[0019] Preferably, the grid plate fixing flat head bolt is customized according to the bolt hole size and the reserved size of the grid plate pressure plate, and is integrally processed from 35CrMo material. The top is elliptical countersunk, the front end of the bolt is designed as a smooth cylinder according to the length of the end cover, and the rear end is equipped with a thread of appropriate nominal diameter. Through the cooperation of the steel cup sealing ring and the bolt, the bolt can be firmly fixed to the outside of the discharge end cover of the ball mill.

[0020] Preferably, the grid plate extension is customized according to the dimensions of the inner ring ball mill grid plate and the original central liner plate, and the original fan-shaped structure is changed into an externally tangent circle triangular structure, which is integrally cast with the inner ring ball mill grid plate; it is integrally cast using wear-resistant and impact-resistant materials.

[0021] Preferably, the grid plate pressure plate and the grid plate cover plate are tightly fitted together, and the overall thickness after fitting is consistent with the thickness of the inner ring ball mill grid plate, and the installation gap between the grid plates is 5-15mm.

[0022] Preferably, the pressure block of the grid plate extension is made of wear-resistant rubber material and is arranged at the bottom end of one side of the grid plate pressure plate during the installation of the central plate grid liner, thereby reducing the gaps in the original central plate liner and enhancing its wear-resistant structure.

[0023] Preferably, the rubber sponge pad on the back of the pressure block is made of wear-resistant rubber. During the overall installation process, it is arranged on the side in contact with the inside of the ball mill cylinder and end cover. The sponge pad is used for contact with the cylinder. The adsorption of the sponge reduces the scouring of the cylinder by the slurry. A layer of rubber is added between the liner and the sponge pad to avoid excessive wear between the ball mill liner and the ball mill cylinder.

[0024] (III) Beneficial Effects

[0025] This invention provides a high-efficiency, high-quality grate-type ball mill center disc liner. It features the following:

[0026] Beneficial effects:

[0027] While maintaining the existing structure of the discharge end cover of the grate ball mill, the grate plate and the central liner plate have been optimized. By increasing the discharge area of ​​the grate plate, the discharge efficiency of the ball mill has been effectively improved. At the same time, it is more convenient for daily fastening and maintenance. The one-piece casting design method and the application of the grate plate extension pressure block combination have greatly extended the service life of the central plate. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of the central disk liner of a grid-type ball mill;

[0029] Figure 2 A structural side view of the installation of the center disc liner of a grid-type ball mill;

[0030] Figure 3 This is a structural diagram of the installation of the center disc liner of a grid-type ball mill.

[0031] Figure 4 A three-dimensional view of the central grid liner;

[0032] In the diagram: 1. Inner ring ball mill grid plate; 2. Grid plate screw holes; 3. Grid plate pressure plate; 4. Grid plate guide holes; 5. Grid plate extension pressure block.

[0033] 11. Grid board extension, 22. Grid board fixing flat head bolt, 33. Grid board cover plate, 55. Rubber sponge pad on the back of the pressure block. Detailed Implementation

[0034] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figure 1-4 This utility model provides a technical solution: a center plate liner for a high-efficiency and high-quality grate-type ball mill, including an inner ring ball mill grate plate 1, grate plate screw holes 2, grate plate pressure plate 3, grate plate guide holes 4 and grate plate extension pressure block 5. A grate plate cover plate 33 is cast on the front of the inner ring ball mill grate plate 1, and a grate plate pressure plate 3 is cast on its back.

[0036] One edge of the grating cover plate 33 is fitted with a grating fixing flat head bolt 22 to achieve a mating connection with the grating pressure plate 3; one edge of the grating pressure plate 3 is fitted with a grating screw hole 2 for the installation of the central plate grating liner; the dimensions of the grating screw hole 2 and the grating fixing flat head bolt 22 are matched; by passing the grating fixing flat head bolt 22 through the grating screw hole 2, the grating pressure plate 3 and the grating cover plate 33 are tightly fitted together;

[0037] The inner ring ball mill grid plate 1 is fixed to the discharge end cover of the grid-type ball mill by grid plate fixing flat head bolts 22;

[0038] The lower end of the inner ring ball mill grid plate 1 is provided with a grid plate extension 11, which is located in the central disk of the grid-type ball mill, thereby expanding the discharge area of ​​the grid plate;

[0039] The grate plate guide holes 4 are regularly distributed on the inner ring ball mill grate plate 1 and grate plate extension 11 to accelerate the discharge rate;

[0040] When the lattice extension pressure block 5 is assembled with the lattice pressure plate 3 and the lattice cover plate 33, it is fitted into the gap between them.

[0041] The grid plate extension pressure block 5 is a side-covered rubber, and its back is fitted with a pressure block back rubber sponge pad 55. The pressure block back rubber sponge pad 55 is located at the end of the liner plate and is in direct contact with the ball mill cylinder and end cover.

[0042] The inner ring ball mill grate plate 1 has a fan-shaped structure and is made of wear-resistant layer or wear-resistant metal integral casting to ensure that it is smooth and seamless. It is fixed to the discharge end cover of the grate-type ball mill by grate plate fixing flat head bolts 22. This structure facilitates the discharge of the ground material.

[0043] The screw hole 2 of the grid plate is an assembly hole that is not closed at one end. Its function is to realize the mutual installation between the inner ring ball mill grid plates 1 and the connection with the discharge end cover.

[0044] The grid plate fixing flat head bolt 22 is customized according to the bolt hole size and the reserved size of the grid plate pressure plate 3. It is made of 35CrMo material as a whole. The top is elliptical countersunk head. The front end of the bolt is designed as a smooth cylinder according to the length of the end cover, while the rear end is equipped with a thread of appropriate nominal diameter. Through the cooperation of the steel cup sealing ring and the bolt, the bolt can be firmly fixed to the outside of the discharge end cover of the ball mill.

[0045] The grid plate extension 11 is customized according to the dimensions of the inner ring ball mill grid plate 1 and the original central liner plate. The original fan-shaped structure is changed into an externally tangent circle triangular structure, which is integrally cast with the inner ring ball mill grid plate 1. It is integrally cast using wear-resistant and impact-resistant materials.

[0046] The grid plate pressure plate 3 and the grid plate cover plate 33 fit together tightly. After fitting, the overall thickness is the same as the thickness of the inner ring ball mill grid plate 1. The installation gap between the grid plates is 5-15mm.

[0047] The grid plate extension pressure block 5 is made of wear-resistant rubber. During the installation of the central plate grid liner, it is placed at the bottom of one side of the grid plate pressure plate 3 to reduce the gaps in the original central plate liner and enhance its wear-resistant structure.

[0048] The rubber sponge pad 55 on the back of the briquette is made of wear-resistant rubber. During the overall installation process, it is placed on the side that contacts the inside of the ball mill cylinder and end cover. The sponge pad is used for contact with the cylinder. The adsorption of the sponge reduces the scouring of the cylinder by the slurry. A layer of rubber is added between the liner and the sponge pad to avoid excessive wear between the ball mill liner and the ball mill cylinder.

[0049] In this embodiment, during operation, the slurry product after passing through the hydrocyclone for sand removal enters the grate-type ball mill cylinder. The cylinder is filled with rubber sponge pads 55 to protect the mill cylinder and end caps. Under the crushing action of the grinding media in the ball mill cylinder, the fine-particle slurry product gradually flows to the discharge liner position along with the rotation of the cylinder and the height difference of the liquid level. It first flows through the outer ring grate plate and then through the inner ring grate plate 1 and the ball mill grate plate extension component 11. The central plate liner obtained by this combination can improve the forced discharge efficiency of the ball mill, and the ore turnover in the cylinder is fast, with less over-grinding, which is beneficial to improving the capacity of the grinding mill. Meanwhile, the grate plate guide holes 4 can also block some large particles from returning to the cylinder for further grinding. In closed-circuit grinding, since a coarser fineness is required, short or medium-length mills are usually combined with classifying equipment to form a closed-circuit system. This structure not only improves the mill discharge efficiency, but also facilitates daily fastening and maintenance. At the same time, the integrated casting design method and the combined application of the rubber pressure block 5 on the side of the grate plate extension greatly extend the service life of the central plate.

[0050] In summary, this utility model optimizes the design of the grid plate and the central liner plate while maintaining the existing structure of the discharge end cover of the grid-type ball mill. By increasing the discharge area of ​​the grid plate, the discharge efficiency of the ball mill is effectively improved. At the same time, it is more convenient for daily fastening and maintenance. The integrated casting design method and the application of the grid plate extension pressure block combination greatly extend the service life of the central plate.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency upgrading lattice-type ball mill center disc lining plate, comprising an inner ring ball mill lattice plate (1), a lattice plate screw hole (2), a lattice plate pressing plate (3), a lattice plate flow guide hole (4), and a lattice plate extension pressing block (5), characterized in that: The inner circle ball mill lattice plate (1) is cast with a lattice plate cover plate (33) in front, and a lattice plate pressing plate (3) in back; One side edge of the lattice plate cover plate (33) is equipped with a lattice plate fixed flat head bolt (22) to realize the matched connection with the lattice plate pressing plate (3); one side edge of the lattice plate pressing plate (3) is equipped with a lattice plate screw hole (2) for the installation of the center disc lattice lining plate; the size of the lattice plate screw hole (2) and the lattice plate fixed flat head bolt (22) are matched with each other; the lattice plate fixed flat head bolt (22) passes through the lattice plate screw hole (2), so that the lattice plate pressing plate (3) and the lattice plate cover plate (33) are tightly matched; The inner circle ball mill lattice plate (1) is fixed on the discharge end cover of the lattice type ball mill through the lattice plate fixed flat head bolt (22); The inner circle ball mill lattice plate (1) is provided with a lattice plate extension part (11) at the lower end, which is located in the center disc of the lattice type ball mill, and expands the discharge area of the lattice plate; The lattice plate flow guide holes (4) are regularly distributed on the inner circle ball mill lattice plate (1) and the lattice plate extension part (11) to accelerate the discharge rate; The lattice plate extension part pressing block (5) is assembled in the gap between the lattice plate pressing plate (3) and the lattice plate cover plate (33) when they are assembled.

2. The center disc liner plate of a high-efficiency upgrading lattice-type ball mill according to claim 1, characterized in that: The lattice plate extension part pressing block (5) is covered with rubber on one side, and is equipped with a pressing block back rubber sponge pad (55) on the back, which is located in the direct contact between the lining plate end and the ball mill cylinder and end cover.

3. The center disc liner plate of a high-efficiency upgrading lattice-type ball mill according to claim 1, characterized in that: The inner circle ball mill lattice plate (1) is in a fan-shaped structure, and is integrally cast with a wear-resistant layer or a wear-resistant metal to ensure that it is smooth and seamless as a whole; the inner circle ball mill lattice plate (1) is fixed on the discharge end cover of the lattice type ball mill through the lattice plate fixed flat head bolt (22), and this structure is beneficial to the discharge of the ground material.

4. The center disc liner plate of a high-efficiency upgrading lattice-type ball mill according to claim 1, characterized in that: The lattice plate screw hole (2) is an open assembly hole at one end, which realizes the mutual installation of the inner circle ball mill lattice plates (1) and the connection with the discharge end cover.

5. The center disc liner plate of a high-efficiency upgrading lattice-type ball mill according to claim 1, characterized in that: The lattice plate fixed flat head bolt (22) is customized according to the size of the bolt hole and the size reserved for the lattice plate pressing plate (3), and is integrally processed with 35CrMo material, and the top is in an oval countersunk shape, the front end of the bolt is designed as a smooth cylinder according to the length of the end cover, and the rear end is equipped with a thread with a proper nominal diameter, and the bolt can be firmly fixed on the outside of the discharge end cover of the ball mill through the cooperation of the steel bowl sealing ring and the bolt.

6. A high efficiency attrition mill center disc liner plate as claimed in claim 1, wherein: The lattice plate extension part (11) is customized according to the size of the inner circle ball mill lattice plate (1) and the original center lining plate, and the original fan-shaped structure is changed into an excircle triangle structure, which is integrally cast with the inner circle ball mill lattice plate (1); and is integrally cast with a wear-resistant and impact-resistant material.

7. The center disc liner plate of a high-efficiency upgrading lattice-type ball mill according to claim 1, characterized in that: The lattice plate pressing plate (3) and the lattice plate cover plate (33) are tightly matched, and the overall thickness after matching is consistent with the thickness of the inner circle ball mill lattice plate (1), and the installation gap between the lattice plates is 5-15 mm.

8. The center disc liner plate of a high-efficiency upgrading lattice-type ball mill according to claim 1, characterized in that: The lattice plate extension block (5) is made of wear-resistant rubber material, arranged at the bottom end of one side of the lattice plate pressing plate (3) during the installation of the center disc lattice lining plate, reduces the gap of the original center disc lining plate, and enhances the wear-resistant structure.

9. The center disc liner plate of a high-efficiency upgrading lattice-type ball mill according to claim 2, characterized in that: The back rubber sponge pad (55) is made of wear-resistant rubber material, arranged in contact with the inside of the ball mill cylinder and end cover during the overall installation, the sponge pad is used for indirect contact with the cylinder, the sponge absorbs the scouring of the slurry on the cylinder, a layer of rubber is added between the lining plate and the sponge pad to avoid excessive wear between the ball mill lining plate and the ball mill cylinder.

Images