Cylinder lining plate for semi-autogenous mill

Abstract

A barrel lining plate for a semi-autogenous mill belongs to the technical field of lining plate structures of semi-autogenous mills and comprises a plurality of high lining plates and a plurality of flat lining plates, and the high lining plates and the flat lining plates are arranged in a barrel at intervals in the circumferential direction to form a'wave structure '. The lining plate has the beneficial effects that the structural design is reasonable, the metal consumption of the lining plate can be reduced, the metal utilization rate of the lining plate is effectively improved, and the actual lifting volume is increased; the lining plate can be suitable for working conditions of super-large specifications and super-large steel balls, the fracture risk of the lining plate of the cylinder body is reduced, the service life of the lining plate is prolonged, the planned shutdown time and the non-planned shutdown time of a mill are shortened, and the operation rate is increased.

Description

Technical Field

[0001] This utility model belongs to the technical field of semi-autogenous grinding mill liner structure, specifically relating to a cylinder liner for a semi-autogenous grinding mill. Background Technology

[0002] Grinding equipment such as mills are key components in mineral processing systems such as mining, transportation, and crushing. They are major energy consumers and among the most important pieces of equipment in the mining industry. They use a rotating cylinder to lift grinding media to a certain height and then drop them, which impacts, grinds, and squeezes the material inside the cylinder, causing it to be crushed. The cylinder liner is an important component that protects the mill cylinder. Its main function is to protect the mill itself from damage by minerals and grinding media, reduce its risk of breakage, and improve its safety factor. This has a crucial impact on the stability of mill operation and even on the mineral processing system.

[0003] With changes in the global mining market, the long-term demand for mining machinery and equipment is increasingly trending towards larger sizes. Faced with intensified competition in the international market, large and ultra-large mills with lower unit production costs have emerged. Along with the increase in the size of mills, on the one hand, the feed particle size of semi-autogenous mills has increased, and on the other hand, the diameter of the steel balls inside the mill and their linear velocity during impact are constantly increasing. The operating conditions of the cylinder liner are constantly deteriorating, the impact on the cylinder liner is constantly increasing, the life of the cylinder liner is shortening, and the risk of cylinder fracture is increasing. In severe cases, this can lead to shutdown accidents, low mill operating rates, disruption of normal mill production, and significant losses to the user companies. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to design a cylinder liner for a semi-autogenous mill, so as to solve the problems mentioned in the background technology, such as shortened cylinder liner life, increased risk of cylinder breakage, serious shutdown accidents, low mill operating rate, and disruption of normal mill production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cylindrical liner for a semi-autogenous grinding mill, comprising a high liner and a flat liner, wherein there are multiple high liners and flat liners, and the high liner and flat liner are spaced apart along the circumferential direction inside the cylindrical body to form a "wave structure".

[0006] The high liner plate includes a base plate A and a lifting strip A. The base plate A is a rectangular plate structure with an upwardly protruding lifting strip A on its upper surface. The connection between the base plate A and the lifting strip A is inclined at a certain angle toward the center of the high liner plate.

[0007] The flat liner includes a base plate B and a lifting strip B. The base plate B is a rectangular plate structure with an arc-shaped lifting strip B on its upper surface. The connection between the base plate B and the lifting strip B is inclined at a certain angle toward the center of the flat liner.

[0008] The cross-section of the lifting bar A is an isosceles triangle. The face angle of the lifting bar A is a three-segment variable face angle, which is composed of three face angles with different angles connected together, including a large-angle lifting angle at the top, a transition angle in the middle, and a small-angle lifting angle at the bottom. The top of the lifting bar A is rounded, and the rounded corner is smoothly connected to the upper part of the large-angle lifting angle. The transition angle is smoothly connected to both the large-angle lifting angle and the small-angle lifting angle. The lower part of the small-angle lifting angle is smoothly connected to the bottom plate A. The surface of the large-angle lifting angle is provided with a lifting lug A for installation with a robot arm. The two ends of the lifting bar A are symmetrically provided with inclined surfaces that slope outwards from the cylinder.

[0009] The connection between the lifting bar B and the base plate B on both sides is a smooth transition. The upper surface of the lifting bar B is provided with lifting lugs B for installation with the robot arm.

[0010] Bolt holes A are spaced apart along the centerline of the high liner plate. Bolt holes A penetrate the lifting bar A and the base plate A. The opening of bolt hole A in the lifting bar A is a groove, and the opening of bolt hole A on the bottom surface of the base plate A is a round opening. Bolt holes B are spaced apart along the centerline of the flat liner plate. Bolt holes B penetrate the lifting bar B and the base plate B. The opening of bolt hole B in the lifting bar B is a groove, and the opening of bolt hole B on the bottom surface of the base plate B is a round opening.

[0011] The bottom surface of the base plate A is provided with a groove A for weight reduction, and the bolt hole A is provided with a bolt hole mounting platform A at the bottom hole opening of the base plate A; the bottom surface of the base plate B is provided with a groove B for weight reduction, and the bolt hole B is provided with a bolt hole mounting platform B at the bottom hole opening of the base plate B.

[0012] The beneficial effects of this utility model are: the reasonable structural design can reduce the amount of metal used in the liner, effectively improve the metal utilization rate of the liner, and increase the actual lifting volume; it can be applied to working conditions of ultra-large size and ultra-large steel balls, reduce the risk of breakage of the cylinder liner, extend the service life of the liner, reduce the planned and unplanned downtime of the mill, and improve the operating rate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the high-lined plate structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the bottom structure of the high liner plate of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the flat liner of this utility model.

[0016] Figure 4 This is a schematic diagram of the bottom structure of the flat liner of this utility model.

[0017] Figure 5 This is a cross-sectional schematic diagram of the "wave structure morphology" of this utility model.

[0018] In the diagram: 1. High liner plate, 2. Lifting bar A, 201. Large angle lifting angle, 202. Transition angle, 203. Small angle lifting angle, 204. Inclined surface, 3. Base plate A, 4. Lifting lug A, 5. Bolt hole A, 6. Groove A, 7. Bolt hole mounting platform A, 8. Flat liner plate, 9. Lifting bar B, 10. Base plate B, 11. Bolt hole B, 12. Groove B, 13. Bolt hole mounting platform B, 14. Lifting lug B. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Please see Figures 1-5A cylindrical liner for a semi-autogenous grinding mill includes a high liner 1 and a flat liner 8. Multiple high liner 1s and flat liner 8s are arranged circumferentially within the cylindrical body, forming a "wave-like structure." The width and length of the high liner 1s and flat liner 8s are adjusted according to actual needs. The high liner 1 includes a base plate A3 and a lifting strip A2. The base plate A3 is a rectangular plate structure with an upwardly protruding lifting strip A2 on its upper surface. The cross-section of the lifting strip A2... The overall structure is an isosceles triangle. The lifting bar A2 has three variable angle segments, each composed of three different angle segments: a large-angle lifting angle 201 at the top, a transition angle 202 in the middle, and a small-angle lifting angle 203 at the bottom. The top of the lifting bar A2 has rounded corners that smoothly connect with the upper part of the large-angle lifting angle 201. The transition angle 202 smoothly connects with both the large-angle lifting angle 201 and the small-angle lifting angle 203. The lower part of the lifting angle 203 smoothly transitions to the base plate A3. The surface of the large-angle lifting angle 201 is provided with lifting lugs A4 for installation with a robotic arm. The lifting lugs A4 are symmetrically arranged on both sides of the large-angle lifting angle 201 surface to ensure stability of the center of gravity during installation. Both ends of the lifting bar A2 are provided with inclined surfaces 204 that slope outwards from the cylinder. The inclined surfaces 204 facilitate the installation and removal of the high-end liner plates 1 at both ends and reduce the lifting effect of the high-end liner plates 1 on the material, thereby reducing the stress on the high-end liner plates 1. To mitigate the impact and extend its service life, the base plate A3 is inclined at a certain angle towards the center of the high liner plate 1 at the connection point with the lifting bar A2. Bolt holes A5 are provided at intervals along the center line of the high liner plate 1. The bolt holes A5 penetrate the lifting bar A2 and the base plate A3. The opening of the bolt hole in the lifting bar A2 is a groove-shaped opening, and the opening of the bolt hole on the bottom surface of the base plate A3 is a round opening. A bolt hole mounting platform A7 is provided at the opening of the bolt hole A5 on the bottom surface of the base plate A3. The bottom surface of the base plate A3 is provided with a groove A6 for weight reduction, and the groove A6 has a depth of 15mm. The flat liner 8 includes a base plate B10 and a lifting bar B9. The base plate B10 is a rectangular plate structure with an arc-shaped lifting bar B9 on its upper surface. The width of the lifting bar B9 is the same as the widest part of the base plate B10. The radius and height of the arc of the lifting bar B9 are calculated and designed by simulation. The connection between the base plate B10 and the lifting bar B9 is inclined at a certain angle towards the center of the flat liner 8. The connection between the two sides of the lifting bar B9 and the base plate B10 is a smooth transition. The upper surface of the lifting bar B9 is provided with lifting lugs B14 for cooperating with the installation of the robot arm.Bolt holes B11 are spaced apart along the centerline of the flat liner plate 8. The bolt holes B11 penetrate the lifting bar B9 and the base plate B10. The opening of the bolt hole in the lifting bar B9 is a groove, and the opening of the bolt hole on the bottom surface of the base plate B10 is a round opening. A bolt hole mounting platform B13 is provided at the opening of the bolt hole B11 on the bottom surface of the base plate B10. The bottom surface of the base plate B10 is provided with a groove B12 for weight reduction, and the groove B12 has a depth of 6mm.

[0021] When using this utility model:

[0022] The high liner 1 and the flat liner 8 are respectively installed on the semi-autogenous grinding mill cylinder using bolts passing through bolt holes A5 and B11. The two are used in a circumferentially spaced manner, and the assembly form is a "wave structure". This assembly method optimizes the liner structure from "equal height" to "wave", which can reduce the weight of the entire liner set and increase the material lifting space of the liner. The width and length of the high liner 1 and the flat liner 8 are set according to the actual needs of the cylinder.

[0023] When the mill rotates, the lifting bars A2 of the high liner plate 1 lift the material and steel balls to a certain height and then drop them. The material and steel balls impact the side of the cylinder where the material contacts the cylinder, thereby achieving the purpose of crushing and grinding the material. The lifting angle of the lifting bar A2 is optimal within a certain range for lifting the steel balls and materials. When the high liner plate 1 is working, the large lifting angle 201 at the top of the lifting bar A2 and the top rounded corner are close to the optimal lifting angle range of the actual operation of the mill. This allows the high liner plate 1 to quickly reach the rated efficiency of the mill in the initial stage of operation. The small lifting angle 203 at the bottom reaches the optimal lifting angle range after a period of operation. The transition angle 202 in the middle part can reduce the amount of metal used and reduce the burden on the mill.

[0024] Finite element grinding simulation analysis of the liner plate shows that, under the same working conditions, when the liner plate is impacted, the stress generated by the flat liner plate 8 is lower. Compared with the yield strength of the liner plate itself, the flat liner plate 8 has a higher safety factor. The high liner plate 1 is more prone to wear. The flat liner plate 8 adopts a rounded top design, which can better resist impact. At the same time, this shape can significantly increase the material lifting space of adjacent liners.

[0025] The connection points between the base plate A3 and the lifting bar A2, the base plate B10 and the lifting bar B9 are inclined at a certain angle toward the center of the liner to prevent the liner from stretching and deforming and to prevent the base plates from interlocking, thus facilitating installation and disassembly.

[0026] Therefore, the cylindrical liner plate of this utility model with the above-described structure has a reasonable structural design, which can effectively reduce the risk of liner plate breakage and extend the service life of the liner plate.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0028] The parts of this utility model not described in detail are existing technologies.

Claims

1. A cylindrical liner for a semi-autogenous mill, comprising a high liner (1) and a flat liner (8), characterized in that: The number of high liner plates (1) and flat liner plates (8) are both multiple. The high liner plates (1) and flat liner plates (8) are arranged at intervals along the circumferential direction in the cylinder to form a "wave structure". The high liner plate (1) includes a base plate A (3) and a lifting strip A (2). The base plate A (3) is a rectangular plate structure with an upwardly protruding lifting strip A (2) on its upper surface. The connection between the base plate A (3) and the lifting strip A (2) is inclined at a certain angle toward the center of the high liner plate (1). The flat liner (8) includes a base plate B (10) and a lifting strip B (9). The base plate B (10) is a rectangular plate structure with an arc-shaped lifting strip B (9) on its upper surface. The connection between the base plate B (10) and the lifting strip B (9) is inclined at a certain angle toward the center of the flat liner (8).

2. The cylinder liner for a semi-autogenous mill according to claim 1, characterized in that: The cross-section of the lifting bar A (2) is an isosceles triangle. The face angle of the lifting bar A (2) is set as a three-segment variable face angle, which is composed of three face angles with different angles connected together, including the upper large angle lifting angle (201), the middle transition angle (202) and the lower small angle lifting angle (203). The top of the lifting bar A (2) is provided with rounded corners, which are smoothly connected to the upper part of the large angle lifting angle (201). The transition angle (202) is smoothly connected to the large angle lifting angle (201) and the small angle lifting angle (203) respectively. The lower part of the small angle lifting angle (203) is smoothly connected to the bottom plate A (3). The surface of the large angle lifting angle (201) is provided with a lifting lug A (4) for cooperating with the installation of the robot arm. The two ends of the lifting bar A (2) are symmetrically provided with inclined surfaces (204) that slope outward towards the cylinder.

3. The cylinder liner for a semi-autogenous mill according to claim 1, characterized in that: The connection between the lifting bar B (9) and the base plate B (10) is a smooth transition. The upper surface of the lifting bar B (9) is provided with lifting lugs B (14) for cooperating with the installation of the robot arm.

4. The cylinder liner for a semi-autogenous mill according to claim 1, characterized in that: Bolt holes A (5) are provided at intervals along the center line of the high liner plate (1). The bolt holes A (5) penetrate the lifting bar A (2) and the bottom plate A (3). The bolt holes A (5) at the opening of the lifting bar A (2) are groove-shaped, and the bolt holes at the bottom surface of the bottom plate A (3) are round. Bolt holes B (11) are provided at intervals along the center line of the flat liner (8). The bolt holes B (11) pass through the lifting bar B (9) and the bottom plate B (10). The opening of the lifting bar B (9) is a groove-shaped opening, and the opening of the bottom surface of the bottom plate B (10) is a round opening.

5. A cylinder liner for a semi-autogenous mill according to claim 4, characterized in that: The bottom surface of the base plate A (3) is provided with a groove A (6) for weight reduction. The bolt hole A (5) is provided with a bolt hole mounting platform A (7) at the bottom hole opening of the base plate A (3). The bottom surface of the base plate B (10) is provided with a groove B (12) for weight reduction. The bolt hole B (11) is provided with a bolt hole mounting platform B (13) at the bottom hole opening of the base plate B (10).

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