Lining plate of tower mill

Abstract

The invention discloses a tower mill lining plate, and relates to the technical field of tower mill equipment, the tower mill lining plate comprises a spiral lining plate body spirally extending along the inner wall of a grinding cylinder, one end of the spiral lining plate body is provided with a first inclined part inclined upwards, and the other end of the spiral lining plate body is provided with a second inclined part inclined downwards. The inclination angle of the first inclined part is 15-45 degrees and is consistent with the spiral rising direction; and the inclination angle of the second inclined part is 10-30 degrees and is consistent with the spiral descending direction. The three are integrally formed by high-chromium cast iron, and a 0.5-2mm wear-resistant coating is arranged on the surface; the lead angle of the spiral lining plate body is 8-15 degrees, the screw pitch is 200-500 mm, and the lengths of the first inclined part and the second inclined part are 1 / 4-1 / 3 and 1 / 5-1 / 4 of the single-circle screw pitch respectively. The bidirectional inclined part is used for guiding materials to slowly climb and stably slide down, so that the materials are prevented from being accumulated or sliding down too fast, and the grinding efficiency and the product fineness uniformity are improved; the wear-resistant structure disperses impact, reduces concentrated wear and prolongs the service life of the lining plate; and the device can be installed without changing the host, and is high in practicability and popularization value.

Description

Technical Field

[0001] This invention relates to the field of tower mill equipment technology, specifically a tower mill liner. Background Technology

[0002] Tower mills, as highly efficient grinding equipment, are widely used in industries such as mining, metallurgy, and building materials. Their core working components include the grinding cylinder, the spiral agitator, and the liners. The liners, as protective components of the inner wall of the tower mill grinding cylinder, not only need to withstand the impact and wear of the grinding media and materials, but also need to work with the spiral agitator to guide the movement trajectory of the materials to ensure grinding efficiency and effect.

[0003] Existing tower mill liners mostly employ straight plate or single-inclined spiral liner structures. While straight plate liners are simple in structure, they offer poor material guidance, leading to localized material accumulation within the grinding cylinder, resulting in uneven grinding and low grinding efficiency. Single-inclined spiral liners, although providing some material guidance, are prone to excessively rapid material slippage or prolonged residence time during material ascent or descent, similarly affecting grinding performance and equipment operational stability. Furthermore, existing liners exhibit concentrated wear areas, resulting in short service life and frequent replacements, increasing equipment maintenance costs and downtime.

[0004] Therefore, developing a tower mill liner that can optimize material movement trajectory, improve grinding efficiency, and extend service life has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention aims to overcome the defects of existing tower mill liners, such as poor material guiding effect, low grinding efficiency, and short service life. It provides a tower mill liner that, by setting inclined portions with different inclination directions at both ends of the spiral liner, achieves precise control of the material movement trajectory, improves grinding efficiency and effect, and at the same time reduces liner wear and extends service life.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tower mill liner, comprising a spiral liner body, wherein the spiral liner body extends spirally along the inner wall of the tower mill grinding cylinder, characterized in that: one end of the spiral liner body is provided with an upwardly inclined first inclined portion, and the other end is provided with a downwardly inclined second inclined portion.

[0007] Furthermore, the tilt angle of the first inclined part is 15°-45°, and its tilt direction is consistent with the spiral upward direction of the spiral liner body. It is used to guide the material to slowly climb up along the inner wall of the grinding cylinder, thereby increasing the contact time between the material and the grinding medium.

[0008] Furthermore, the inclination angle of the second inclined part is 10°-30°, and its inclination direction is consistent with the spiral descent direction of the spiral liner body. This is used to guide the material to slide smoothly down the inner wall of the grinding cylinder and avoid material accumulation.

[0009] Furthermore, the spiral liner body, the first inclined portion, and the second inclined portion are integrally formed structures, made of high-chromium cast iron, and their surfaces are provided with a wear-resistant coating with a thickness of 0.5-2mm.

[0010] Furthermore, the spiral helix angle of the spiral liner body is 8°-15° and the pitch is 200-500mm, ensuring that the material can achieve continuous and stable movement under the guidance of the spiral liner.

[0011] Furthermore, the length of the first inclined portion is 1 / 4 to 1 / 3 of the pitch of a single turn of the spiral liner body, and the length of the second inclined portion is 1 / 5 to 1 / 4 of the pitch of a single turn of the spiral liner body, so as to ensure a smooth transition of material movement at the turning point.

[0012] Compared with the prior art, the present invention provides a tower mill liner with the following advantages:

[0013] 1. An upward-sloping first inclined section and a downward-sloping second inclined section are respectively set at both ends of the spiral liner. This can guide the material to achieve a continuous movement of "slowly climbing and smoothly sliding" in the grinding cylinder, avoiding the accumulation of material or the phenomenon of sliding too fast. This allows the material to fully contact the grinding media and grind evenly, significantly improving the grinding efficiency and the fineness uniformity of the ground product.

[0014] 2. Reduce liner wear: The one-piece molded high-chromium cast iron structure combined with the wear-resistant coating on the surface improves the overall strength and wear resistance of the liner; at the same time, the reasonable tilt angle and length design disperses the impact of materials on the liner, avoids the concentration of wear points, extends the service life of the liner, and reduces equipment maintenance costs and downtime.

[0015] 3. Simple structure and easy installation: The liner structure of this invention is reasonably designed and highly compatible with the existing tower mill grinding cylinder. It can be directly installed and used without modifying the main structure of the tower mill, and has strong practicality and promotional value.

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure in this invention where the liner is mounted on the tower mill shaft;

[0019] Figure 2 This is a schematic diagram of the liner plate in this invention.

[0020] In the figure: 1. Spiral liner body; 2. First inclined part; 3. Second inclined part. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-2 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0022] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Example 1

[0025] A tower mill liner includes a spiral liner body 1, which extends spirally along the inner wall of the tower mill grinding cylinder with a helix angle of 10° and a pitch of 300mm. One end of the spiral liner body 1 has an upward-sloping first inclined portion with an inclination angle of 30° and a length of 100mm (i.e., 1 / 3 of the pitch per turn), the inclination direction of which is consistent with the upward spiral direction of the spiral liner body 1. The other end of the spiral liner body 1 has a downward-sloping second inclined portion with an inclination angle of 20° and a length of 75mm (i.e., 1 / 4 of the pitch per turn), the inclination direction of which is consistent with the downward spiral direction of the spiral liner body 1.

[0026] The spiral liner body 1, the first inclined section, and the second inclined section are integrally formed from high-chromium cast iron, and the surface is coated with a 1mm thick tungsten carbide wear-resistant coating. The liner of this embodiment was installed inside the grinding cylinder of a Φ1200×2000mm tower mill for a grinding test of a certain iron ore. Compared with existing spiral liners with a single inclined direction, the grinding efficiency was increased by 15%, the uniformity of the fineness of the ground product was improved by 20%, and the service life of the liner was extended by 30%.

[0027] Example 2

[0028] A tower mill liner includes a spiral liner body 1, which extends spirally along the inner wall of the tower mill grinding cylinder with a helix angle of 12° and a pitch of 400mm. One end of the spiral liner body 1 has an upward-sloping first inclined portion with an inclination angle of 25° and a length of 100mm (i.e., 1 / 4 of the pitch per turn), its inclination direction being consistent with the spiral upward direction of the spiral liner body 1. The other end of the spiral liner body 1 has a downward-sloping second inclined portion with an inclination angle of 15° and a length of 80mm (i.e., 1 / 5 of the pitch per turn), its inclination direction being consistent with the spiral downward direction of the spiral liner body 1.

[0029] The spiral liner body 1, the first inclined section, and the second inclined section are integrally formed from high-chromium cast iron, and the surface is coated with a 1.5mm thick alumina wear-resistant coating. The liner of this embodiment was installed inside the grinding cylinder of a Φ1500×2500mm tower mill for a grinding test on a certain limestone. Compared with existing straight-plate liners, the grinding efficiency was increased by 25%, material accumulation was completely eliminated, and the liner service life was extended by 40%.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A tower mill liner comprising a helical liner body, the helical liner body (1) being provided helically extending along the inner wall of a tower mill grinding drum, characterized in that: One end of the spiral lining body is provided with an upwardly inclined first inclined part (2), and the other end is provided with a downwardly inclined second inclined part (3).

2. A tower mill liner according to claim 1, characterized in that: The inclination angle of the first inclined part (2) is 15°-45°, and the inclination direction is consistent with the upward spiral direction of the spiral lining body.

3. A tower mill liner according to claim 1, characterized in that: The inclination angle of the second inclined part (3) is 10°-30°, and the inclination direction is consistent with the downward spiral direction of the spiral lining body.

4. A tower mill liner according to claim 1, characterized in that: The spiral lining body (1), the first inclined part (2) and the second inclined part (3) are integrally formed and are made of high-chromium cast iron.

5. A tower mill liner according to claim 1, wherein: The surface of the spiral lining body (1), the first inclined part (2) and the second inclined part (3) is provided with a wear-resistant coating, and the thickness of the wear-resistant coating is 0.5-2mm.

6. A tower mill liner according to claim 1, characterized in that: The spiral angle of the spiral lining body is 8°-15°, and the pitch is 200-500mm.

7. A tower mill liner according to claim 1, characterized in that: The length of the first inclined part (2) is 1 / 4-1 / 3 of the single-pitch of the spiral lining body (1), and the length of the second inclined part (3) is 1 / 5-1 / 4 of the single-pitch of the spiral lining body (1).

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