Ball mill lining plate for preparing superfine powder

Abstract

The utility model discloses a ball mill lining plate for preparing superfine powder, which comprises a lining plate bottom plate, the top surface of the lining plate bottom plate is a grinding working surface, the lining plate bottom plate is provided with at least two grinding working surfaces, each grinding working surface is an involute arc-shaped curved surface, each grinding working surface is provided with a grinding medium lifting flow guide strip, and the grinding medium lifting flow guide strips are arranged on the lining plate bottom plate. Reinforcing ribs are embedded in the lining plate bottom plate, and positioning through grooves and positioning strips are arranged on the two side faces, arranged in the axial direction of the ball mill, of the lining plate bottom plate correspondingly. Materials on the grinding working face make full contact with grinding media, grinding is carried out by making full use of sliding friction between the grinding media and the grinding working face, the grinding media lift the flow guide strips to promote self-circulation of the grinding media and the materials, the contact face with the grinding media is changed into line contact from point contact, the grinding area is increased, and the grinding efficiency is improved. And a positioning strip, a positioning through groove, a positioning pin and a positioning circular groove are arranged, so that the lining plate bottom can be quickly and accurately positioned and spliced.

Description

Technical Field

[0001] The utility model relates to the technical field of powder processing, and specifically relates to a ball mill liner for preparing ultrafine powder. Background Technique

[0002] The ultrafine powder industry is an emerging industry developed along with the development of modern high-tech and new material industries. After the material is ultrafinely pulverized, it exhibits peculiar properties different from macroscopic substances in terms of optics, thermology, magnetism, electricity, chemical activity, surface effect, etc. Making full use of these properties can maximize the role of materials and manufacture new materials with excellent performance.

[0003] Ball mills are widely used because of their better adaptability and adjustment space, and can effectively grind finer particle sizes. Liners for protecting the cylinder body and assisting in grinding are usually provided on the inner wall of the ball mill, so that the cylinder body is not directly impacted and rubbed by the grinding media and materials. At the same time, different forms of liners can be used to adjust the motion state of the grinding media to enhance the crushing effect of the grinding media on the materials, which helps to improve the grinding efficiency of the mill. However, the traditional ball mill liners and the grinding media usually have point contact, with a small contact area, resulting in low efficiency, and the circulation and mixing effects of the grinding media and the materials are not good, and the grinding requirements of ultrafine powder cannot be met. At the same time, during the assembly process of the traditional ball mill liners, it is often necessary to manually align each liner, and the liners often have misalignment and skew conditions, thus affecting the overall installation effect of the liners. Content of the Utility Model

[0004] The purpose of the utility model is to provide a ball mill liner for preparing ultrafine powder, which has the advantages of high grinding efficiency, good circulation and mixing effects of the grinding media and the materials, and convenient assembly, and solves the problems in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A ball mill liner for preparing ultrafine powder includes a liner bottom plate. The top surface of the liner bottom plate is a grinding working surface. There are no less than two grinding working surfaces on the liner bottom plate. The grinding working surfaces are involute-shaped arc surfaces. A grinding medium lifting and guiding strip is provided on each grinding working surface. A wear-resistant layer of hard alloy surfacing is provided on the surface of the grinding medium lifting and guiding strip. Reinforcing ribs are buried inside the liner bottom plate. Positioning through grooves and positioning strips are respectively provided on two side surfaces of the liner bottom plate arranged along the axial direction of the ball mill. The positioning through grooves match the positioning strips on adjacent liner bottom plates.

[0007] Preferably, the grinding medium lifting and guiding strip is an involute-shaped convex platform along the axial direction of the ball mill, and the involute direction is consistent with the material flow direction inside the ball mill. The grinding working surface and the grinding medium lifting and guiding strip are of an integral casting structure.

[0008] Preferably, an adaptive buffer layer is provided on the contact surface between the lining plate bottom plate and the inner wall of the ball mill, and the adaptive buffer layer is made of an elastic material.

[0009] Preferably, a mounting hole is provided in the middle position of the intersection line of the two grinding working surfaces, the mounting hole penetrates through the lining plate bottom plate and the adaptive buffer layer, and a fixed hole seat corresponding to the mounting hole is provided on the inner wall of the ball mill.

[0010] Preferably, the reinforcing ribs include transverse ribs and arc-shaped ribs. The transverse ribs are in the same extending direction as the rotating shaft of the ball mill. Two transverse ribs are provided in each lining plate bottom plate, and the ends of the two transverse ribs on the same side are connected by arc-shaped ribs respectively.

[0011] Preferably, a positioning circular groove is provided on one side surface of the lining plate bottom plate in the radial direction of the ball mill. The bottom surface of the positioning circular groove is the end surface of one side of the arc-shaped rib. The other end surface of the arc-shaped rib penetrates through the other side surface in the radial direction of the lining plate bottom plate, and the penetrating part of the arc-shaped rib forms a positioning pin, and the positioning pin matches with the positioning circular groove on the adjacent lining plate bottom plate.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The grinding working surface of the present utility model is an involute-shaped arc smooth curved surface, so that the materials on the grinding working surface are easy to be in full contact with the grinding medium, the grinding area is increased as much as possible, and the sliding friction between the grinding medium and the grinding working surface is fully utilized for grinding; the grinding medium lifting and guiding strip continuously drives and lifts the grinding medium, promotes the self-circulation of the grinding medium and the materials, and the contact surface with the grinding medium changes from point contact to line contact, increasing the grinding area, thereby strengthening the grinding effect and improving the processing efficiency of ultrafine powder.

[0014] 2. When the present utility model is installed, the positioning strip on the lining plate bottom plate is slid into the positioning through groove on the adjacent lining plate bottom plate, and then the positioning pin of the lining plate bottom plate is aligned and inserted into the adjacent positioning circular groove, so as to quickly and accurately position and splice the lining plate bottom, avoid the deviation caused by manual alignment, save time and improve the installation efficiency.

[0015] 3. The present utility model is provided with an adaptive buffer layer on the contact surface between the lining plate bottom plate and the ball mill, which can absorb the impact force of the grinding medium and the materials on the lining plate bottom plate during work, reduce direct wear; the transverse ribs and arc-shaped ribs are provided to further strengthen the stiffness of the lining plate bottom plate and avoid deformation during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the first axonometric view of the lining plate bottom plate of the present utility model;

[0017] Figure 2 is the axonometric view of the reinforcing ribs of the present utility model;

[0018] Figure 3 This is the second axonometric drawing of the lining plate bottom plate of the present utility model;

[0019] Figure 4 This is the assembly schematic diagram of the lining plate bottom plate of the present utility model.

[0020] In the figure: 1. Lining plate bottom plate; 2. Grinding working surface; 3. Grinding medium lifting and guiding strip; 4. Wear-resistant layer; 5. Positioning through groove; 6. Positioning strip; 7. Horizontal rib; 8. Arc rib; 9. Positioning circular groove; 10. Positioning pin; 11. Adaptive buffer layer; 12. Mounting hole. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0022] In order to solve the problems of low grinding efficiency, poor circulation and mixing effects of grinding media and materials, and inconvenient assembly existing in the prior art, the following technical solutions are given. Please refer to Figures 1-4 ;

[0023] A ball mill lining plate for preparing ultrafine powder includes a lining plate bottom plate 1. The top surface of the lining plate bottom plate 1 is a grinding working surface 2. The lining plate bottom plate 1 is provided with at least two grinding working surfaces 2. The grinding working surface 2 is an involute-shaped arc smooth surface, so that the materials on the grinding working surface 2 are easy to come into full contact with the grinding media, and the grinding area is increased as much as possible; since the grinding working surface 2 is a groove structure, there is always material between the grinding media and the lining plate bottom plate 1. Each grinding medium grinds and impacts within a certain angle range, avoiding direct metal contact, which can further improve the grinding and impact efficiency.

[0024] Each grinding working surface 2 is provided with a grinding medium lifting and guiding strip 3. The grinding medium lifting and guiding strip 3 is an involute-shaped convex platform cast on the grinding working surface 2 along the axial direction of the ball mill. When the ball mill runs, the grinding medium lifting and guiding strip 3 will lift the grinding media. At the same time, the grinding media slide down along the grinding medium lifting and guiding strip 3 and move towards the grinding head as a whole. The grinding media in the upper part will fill down, thereby promoting the self-circulation of the grinding media and strengthening the grinding effect.

[0025] The surface of the grinding medium lifting and guiding strip 3 is provided with a wear-resistant layer 4 of hard alloy surfacing, which can reduce the wear degree of the grinding medium lifting and guiding strip 3.

[0026] Reinforcing ribs are embedded inside the lining plate bottom plate 1. The reinforcing ribs include transverse ribs 7 and arc-shaped ribs 8. The transverse ribs 7 are in the same direction as the extension direction of the rotating shaft of the ball mill. There are two transverse ribs 7 in each lining plate bottom plate 1, and the ends of the two transverse ribs 7 on the same side are connected by arc-shaped ribs 8 respectively; the transverse ribs 7 and arc-shaped ribs 8 can enhance the overall rigidity and stability of the lining plate bottom plate 1, ensure that it does not deform under long-term high-load operation, and extend the service life.

[0027] Positioning through grooves 5 and positioning strips 6 are respectively arranged on two side surfaces of the lining plate bottom plate 1 arranged along the axial direction of the ball mill. The positioning through grooves 5 match the positioning strips 6 on the adjacent lining plate bottom plate 1. A positioning circular groove 9 is opened on one side surface of the lining plate bottom plate 1 in the radial direction of the ball mill. The bottom surface of the positioning circular groove 9 is the end surface of one side of the arc-shaped rib 8. The other end surface of the arc-shaped rib 8 penetrates through the other radial side surface of the lining plate bottom plate 1, and the penetrating part of the arc-shaped rib 8 forms a positioning pin 10. The positioning pin 10 matches the positioning circular groove 9 on the adjacent lining plate bottom plate 1; during installation, slide the positioning strip 6 on the lining plate bottom plate 1 into the positioning through groove 5 on the adjacent lining plate bottom plate 1, and then align and insert the positioning pin 10 of the lining plate bottom plate 1 into the adjacent positioning circular groove 9, so as to quickly and accurately position and splice the lining plate bottom plate 1, avoid the deviation caused by manual alignment, save time, and improve the installation efficiency; the positioning pins 10 are aligned and inserted into the adjacent positioning circular grooves 9 in sequence to make the arc-shaped ribs 8 connected into a circular whole, which can further enhance the rigidity and stability of the overall structure.

[0028] An adaptive buffer layer 11 is arranged on the contact surface between the lining plate bottom plate 1 and the inner wall of the ball mill. The adaptive buffer layer 11 is made of elastic material, which can absorb the impact force of the grinding medium and the material on the lining plate bottom plate 1 during work, reduce direct wear, and at the same time ensure good sealing performance to prevent powder leakage.

[0029] An installation hole 12 is opened in the middle position of the intersection line of the two grinding working surfaces 2. The installation hole 12 penetrates through the lining plate bottom plate 1 and the adaptive buffer layer 11. A fixed hole seat corresponding to the installation hole 12 is opened on the inner wall of the ball mill. The lining plate bottom plate 1 is fixed on the inner wall of the ball mill through the cooperation of bolts and the installation hole 12.

[0030] Working principle: The grinding working surface 2 is an involute-shaped arc-shaped smooth curved surface, so that the material on the grinding working surface 2 is easy to fully contact with the grinding medium, and the grinding area is increased as much as possible; the grinding working surface 2 is a groove structure, so that there is always material between the grinding medium and the lining plate bottom plate 1, which can further improve the grinding and impact efficiency; when the ball mill operates, the grinding medium lifting and guiding strip 3 will lift the grinding medium, promote the self-circulation of the grinding medium, and strengthen the grinding effect; during installation, slide the positioning strip 6 on the lining plate bottom plate 1 into the positioning through groove 5 on the adjacent lining plate bottom plate 1, and then align and insert the positioning pin 10 of the lining plate bottom plate 1 into the adjacent positioning circular groove 9, so as to quickly and accurately position and splice the lining plate bottom plate 1.

[0031] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ball mill liner for preparing ultrafine powders, comprising a liner bottom plate (1), characterized in that: The top surface of the liner bottom plate (1) is a grinding working surface (2). The liner bottom plate (1) is provided with no less than two grinding working surfaces (2). The grinding working surfaces (2) are involute arc-shaped curved surfaces. Each grinding working surface (2) is provided with a grinding medium lifting and guide strip (3). The surface of the grinding medium lifting and guide strip (3) is provided with a hard alloy surfacing wear-resistant layer (4). Reinforcing ribs are embedded inside the liner bottom plate (1). Positioning grooves (5) and positioning strips (6) are respectively provided on two side surfaces of the liner bottom plate (1) arranged along the axial direction of the ball mill. The positioning grooves (5) and the positioning strips (6) on the adjacent liner bottom plates (1) match each other.

2. A ball mill liner for preparing ultrafine powder according to claim 1, characterized in that: The grinding medium lifting guide strip (3) is an involute-type boss along the axial direction of the ball mill, the involute direction is consistent with the material flow direction in the ball mill, and the grinding working surface (2) and the grinding medium lifting guide strip (3) are an integrated casting structure.

3. A ball mill liner for preparing ultrafine powder according to claim 2, characterized in that: An adaptive buffer layer (11) is provided on the contact surface between the liner bottom plate (1) and the inner wall of the ball mill, and the adaptive buffer layer (11) is made of elastic material.

4. A ball mill liner for preparing ultrafine powder according to claim 3, characterized in that: A mounting hole (12) is provided at the middle of the intersection of the two grinding working surfaces (2); the mounting hole (12) penetrates the liner bottom plate (1) and the adaptive buffer layer (11); and a fixing hole seat corresponding to the mounting hole (12) is provided on the inner wall of the ball mill.

5. A ball mill liner for preparing ultrafine powder according to claim 4, characterized in that: The reinforcing ribs include transverse ribs (7) and arcuate ribs (8); the transverse ribs (7) extend in the same direction as the rotation axis of the ball mill; two transverse ribs (7) are provided in each liner bottom plate (1); the ends of the two transverse ribs (7) located on the same side are connected by arcuate ribs (8).

6. A ball mill liner for preparing ultrafine powder according to claim 5, characterized in that: The liner bottom plate (1) is provided with a positioning circular groove (9) on one radial side of the ball mill, the bottom surface of the positioning circular groove (9) is the end surface of one side of the arc-shaped rib (8), the other end surface of the arc-shaped rib (8) passes through the other radial side of the liner bottom plate (1), and the protruding portion of the arc-shaped rib (8) forms a positioning pin (10), and the positioning pin (10) matches the positioning circular groove (9) on the adjacent liner bottom plate (1).

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