CN221230718U

CN221230718U - Composite lining plate and semi-autogenous mill

Info

Publication number: CN221230718U
Application number: CN202323152595.6U
Authority: CN
Inventors: 罗兵; 熊锋; 胡江; 蔡仁星; 刘卫骏
Original assignee: Jiangxi Naipu Mining Machinery Co ltd
Current assignee: Jiangxi Naipu Mining Machinery Co ltd
Priority date: 2023-11-22
Filing date: 2023-11-22
Publication date: 2024-06-28
Anticipated expiration: 2033-11-22

Abstract

The utility model provides a composite lining plate and a semi-autogenous mill, wherein the composite lining plate comprises a rubber lining body, lifting strips and a bottom lining plate, a metal framework is coated in the rubber lining body, the lifting strips are adhered to one side of the rubber lining body, a first wear-resistant metal layer is arranged on the part of the lifting strips, which is not adhered to the rubber lining body, and a top surface, a first side plane and a second side plane which is inclined at an angle of 5-90 degrees with the top surface are formed on the first wear-resistant metal layer; the rubber lining body is also provided with a mounting hole, a mounting seat connected with the metal framework is arranged in the mounting hole, the bottom lining plate is adhered to the other side of the rubber lining body opposite to the lifting strip, the height of the bottom lining plate is lower than that of the lifting strip, and a second wear-resistant metal layer is arranged on the part of the bottom lining plate, which is not adhered to the rubber lining body. The composite lining plate has the characteristics of relatively light weight, convenient installation, smash resistance and wear resistance, and the semi-autogenous mill provided with the composite lining plate has good crushing effect, relatively small running load and running noise and good sealing property.

Description

Composite lining plate and semi-autogenous mill

Technical Field

The utility model relates to the technical field of ore grinding equipment, in particular to a composite lining plate and a semi-autogenous mill.

Background

In large concentrating mills, coarse-size ore is subjected to grinding operations to meet the requirement of the entering particle size, and a process flow from coarse size to fine size is called grinding. There are many kinds of grinding equipment currently used, and among them, semi-autogenous mill is widely used in various large mines due to advantages of short grinding process, high productivity and low cost.

The semi-autogenous mill is one of the autogenous mills, no ore grinding medium is usually added in the autogenous mill, the purpose of grinding ore is achieved only by the grinding stripping and impact action of the ore, and partial steel balls are added in the ore grinding medium, so that the purpose of grinding ore materials is achieved by the impact crushing and grinding action of the ore and the steel balls. The barrel lining plate of the semi-automatic mill is used as one of key components affecting the grinding performance of the mill, plays roles of lifting ores and steel balls, resisting smashing and abrasion, protecting the steel body of the mill and the like, and most of the semi-automatic mills at present basically use pure metal lining plates during initial production.

However, since the cylinder diameter of the semi-autogenous mill is generally large, the single piece metal lining plate is large in size and heavy in weight, and the following problems occur in actual use: firstly, the heat treatment requirement of the massive metal lining plate is high, the performance is unstable, the abrasion is quicker in the use process, and the installation hole position is easy to crack; secondly, the metal lining plate is required to be rigidly contacted with the inner surface of the cylinder body of the semi-autogenous mill during installation, but the large and heavy metal lining plate is inconvenient to install and carry, the mill after the metal lining plate is installed has large running load and high power consumption, and the noise generated by the impact of the steel balls on the metal lining plate is also very large; thirdly, in order to conveniently install the pure metal lining plate, the gap between adjacent lining plates is larger than the design value, the gap is influenced by the manufacturing process, the actual size of the processed metal lining plate is smaller than the design value, and the accumulation of local gaps is overlarge during actual installation, so that ore pulp in the cylinder body leaks.

Disclosure of utility model

Based on the characteristics, the composite lining plate has the characteristics of relatively light weight, convenient installation, smash resistance and wear resistance, and further the semi-autogenous mill provided with the composite lining plate has good crushing effect, relatively small running load and running noise and good sealing property.

In one aspect, the present utility model provides a composite liner for use in a semi-autogenous mill, comprising: the rubber lining body, the lifting bar and the bottom lining plate are internally coated with a metal framework, the lifting bar is adhered to one side of the rubber lining body, a first wear-resistant metal layer is arranged on the part of the lifting bar, which is not adhered to the rubber lining body, and a top surface, a first side plane and a second side plane which is inclined at an angle of 5-90 degrees with the top surface are formed on the first wear-resistant metal layer; the rubber lining body is also provided with a mounting hole, a mounting seat connected with the metal framework is arranged in the mounting hole, the bottom lining plate is adhered to the other side of the rubber lining body opposite to the lifting strip, the height of the bottom lining plate is lower than that of the lifting strip, and a second wear-resistant metal layer is arranged on the part of the bottom lining plate, which is not adhered to the rubber lining body.

In addition, the composite lining board according to the utility model can also have the following additional technical characteristics:

Further, the part of the lifting bar, which is not adhered with the rubber lining body, is also provided with an arc-shaped surface positioned between the first side plane and the second side plane, and the included angle between the tangent line of the joint of the first side plane and the arc-shaped surface and the top surface is consistent with the inclination angle range of the second side plane.

Further, the height of the lifting bar is 150-500 mm, the minimum width is more than 80mm, and the maximum width is more than 200mm.

Further, the height of the bottom lining plate is 60-200 mm.

Further, the cross section of the bottom lining plate is rectangular.

Further, the cross section of the bottom lining plate is L-shaped.

Further, the section of the inner cavity of the mounting seat is in a shoe-shaped gold ingot.

Further, a lifting lug is arranged on the metal framework and extends out of the rubber lining body.

On the other hand, based on the same inventive concept, the utility model also provides a semi-autogenous mill, which comprises a cylinder body, wherein the inner wall of the cylinder body is circumferentially arrayed with the composite lining plate.

Further, rubber plugs are filled between adjacent composite liners.

The composite lining plate and the semi-autogenous mill have the following beneficial effects: on one hand, as the composite lining board adopts the rubber lining body, and the rubber is a high-elasticity polymer material, the high-elasticity deformation of the composite lining board can absorb and repel impact force and friction force, and the composite lining board can bear the impact of ore materials and ore grinding media by means of the rubber lining body, and has higher impact resistance and longer service life compared with the traditional metal lining board. Meanwhile, as the weight of rubber is lighter than that of metal, the weight of a single composite lining plate can be reduced, so that the installation is convenient, the operation load of the semi-autogenous mill is reduced, and the operation power consumption of the semi-autogenous mill is reduced. In addition, the rubber has stable performance price ratio, the prepared size is accurate, error control is carried out during installation, and the rubber has stronger elasticity, so that the falling and throwing mineral aggregate and grinding medium can be buffered, and the vibration noise generated by impact is reduced. And the lifting strips and the bottom lining plates are made of metal materials, so that the overall strength and rigidity of the composite lining plate can be increased, the installation strength of the composite lining plate can be ensured, and a large amount of mineral aggregate and grinding media can be driven and lifted to fall down, so that the grinding effect is realized. Finally, the part of the lifting strip and the bottom lining plate, which is not adhered to the rubber lining body, is provided with the wear-resistant metal layer, so that the effects of wear resistance, corrosion resistance and impact fracture resistance are achieved, the service life of the composite lining plate is further prolonged, meanwhile, the lifting strip and the bottom lining plate are only provided with the wear-resistant metal layer on the exposed surface, the rest part can be made of conventional metal, and the comprehensive manufacturing cost of the semi-autogenous mill can be reduced due to the fact that the production cost of the wear-resistant metal is high.

Drawings

FIG. 1 is a cross-sectional view of a first composite liner of the present utility model;

FIG. 2 is an enlarged view of a portion of embodiment E of FIG. 1;

FIG. 3 is a cross-sectional view in the direction F-F of the embodiment of FIG. 2;

FIG. 4 is a cross-sectional view of a second composite liner of the present utility model;

FIG. 5 is an axial side view of the semi-autogenous mill of the present utility model with composite liner plates assembled;

FIG. 6 is a partial enlarged view at embodiment A in FIG. 5;

Description of main reference numerals:

Rubber lining body 100, metal framework 110, lifting lug 111, mounting hole 120, inclined part 130, mounting seat 121, lifting bar 200, top surface 210, first side plane 220, second side plane 230, arc-shaped surface 240, bottom lining plate 300, second wear-resistant metal layer 310, wear-resistant protrusion 320, cylinder 400 and rubber stopper 500.

The utility model will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Several embodiments of the utility model are presented in the figures. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, 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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The semi-autogenous mill body is composed of a feeding end cover, a discharging end cover, a middle round cylinder body and other parts, wherein the steel balls for grinding mineral mediums and mineral materials to be ground are contained in the body, but in order to prevent the body from being damaged by long-term grinding under the load in the cylinder body, lining plates are added in the two end covers and the body to protect the body. The lining plates are various in form, and besides the basic protection effect, the lining plates with different surface shapes can influence the movement form of the internal load of the semi-autogenous mill and the ore grinding performance of the semi-autogenous mill.

In addition, different types of liner clamps have different lifting bars, wherein the lifting bars shape affects the semi-autogenous mill: the surface of the lifting strip is smooth, so that the mill is suitable for fine crushing and fine grinding, and if the surface fluctuation is large, the lifting effect of the load is enhanced, the impact effect is aggravated, and the medium crushing effect is preferential; different surface shapes bring different lifting effects, and the curved surface shape of the reasonably designed lifting strip can prolong the lifting interval of the grinding ball, improve the position of the throwing point and strengthen the grinding effect.

Influence of lifter bar height on semi-autogenous mill: the height of the lifting bar influences the motion state of internal load, the effective diameter of the semi-autogenous mill is reduced when the height of the lifting bar is too high, a large amount of load is mixed in a lining plate groove, the load power of the semi-autogenous mill is increased, the larger the height of the lifting bar is, the stronger the external force effect is, the breakage is easy to occur under the condition that the toughness of the lining plate is not high, the yield is influenced, the load particles are not obviously lifted when the height of the lifting bar is too low, and the breaking and grinding efficiency is low; meanwhile, the height of the lifting bar is matched with the diameter of the grinding medium in the barrel, and the height of the lifting bar is generally equal to or slightly higher than the maximum diameter of the steel ball, and is not beneficial to the working performance of the semi-autogenous mill.

Influence of the number of lifting bars on the semi-autogenous mill: the increase of the quantity of the lifting bars is beneficial to the lifting effect of the internal load of the semi-autogenous mill, the more load particles are lifted, the larger the generated crushing useful power is, the better the crushing effect on mineral aggregate is, but the quantity exceeds a certain range, the distance between the lifting bars is too small, the ball containing quantity is too low, the energy consumption utilization rate of the semi-autogenous mill is reduced, and the ore grinding performance is influenced.

In order to facilitate the installation of the lining plate in the cylinder body of the semi-autogenous mill, prevent the lining plate from wearing fast and reduce the operation load and the operation noise of the semi-autogenous mill, as shown in figures 1-4, the composite lining plate provided by the utility model comprises: the rubber lining body 100, the lifting strip 200 and the bottom lining plate 300 are coated with the metal framework 110, the lifting strip 200 is adhered to the left side of the rubber lining body 100, a first wear-resistant metal layer is arranged on the part of the surface of the lifting strip 200, which is not adhered to the rubber lining body, and a top surface 210, a first side plane 220 and a second side plane 230 which is obliquely arranged at an angle of 5-90 degrees (an angle beta in fig. 1) with the top surface are formed on the first wear-resistant metal layer. The rubber lining body 100 is also provided with a mounting hole 120, a mounting seat 121 connected with the metal framework 110 is arranged in the mounting hole 120, bolts are placed on the mounting seat 121 during assembly, and the bolts are screwed on the outer wall of the cylinder, so that the composite lining plate can be stably mounted on the inner wall of the cylinder of the semi-autogenous mill; since the mounting seat 121 is completely under the protection of the thicker rubber bushing 100, mineral aggregate and grinding media do not directly act on the mounting bolts, so that the bolts penetrating through the mounting holes 120 can be well protected. The base liner 300 is adhered to the right side of the rubber bushing 100 and has a lower height than the lifting bars 200 in order to form a space between adjacent lifting bars 200 for accommodating mineral aggregate and grinding media. The portion of the backing plate 300 not bonded to the rubber backing body 100 is provided with a second wear-resistant metal layer 310. Alternatively, the metal skeleton 110 may be made of Q235B low-carbon steel. Specifically, when the composite lining board is prepared, a glue hanging structure is designed on the lifting bar 200, namely, the metal surface of the lifting bar 200 is adhered with rubber by brushing special glue, and then the metal surface and the rubber are put into a die together, and are formed by press vulcanization. In addition, the first and second wear resistant metal layers 310 are each a high performance alloy, such as alloy steel, high manganese steel, high chromium cast iron, which is shape cast or plate wrought.

In this example, on one hand, since the composite lining board adopts the rubber lining body 100, and rubber is a high-elasticity polymer material, the high-elasticity deformation can absorb and repel impact force and friction force, and the rubber lining body 100 can bear the falling and throwing impact of mineral aggregates and grinding media, the composite lining board has higher impact resistance and service life compared with the traditional metal lining board. Meanwhile, the weight of rubber is lighter than that of metal, so that the weight of a single composite lining plate can be reduced, the installation is convenient, and the running load of the semi-autogenous mill is reduced. In addition, the rubber has stronger elasticity, so that the falling and thrown mineral aggregate and grinding medium can be buffered, and the vibration noise generated by impact is reduced. On the other hand, the lifting strips 200 and the bottom lining plates 300 are made of metal materials, so that the overall strength and rigidity of the composite lining plates can be increased, the installation strength of the composite lining plates can be ensured, and a large amount of mineral aggregate and grinding media can be driven and lifted to fall down, so that the grinding effect is realized. Finally, the abrasion-resistant metal layer is further arranged at the part of the lifting bar 200 and the bottom lining plate 300 which is not adhered to the rubber lining body 100, so that the abrasion-resistant, corrosion-resistant and impact-resistant fracture-resistant effects can be achieved, the service life of the composite lining plate is further prolonged, meanwhile, the lifting bar 200 and the bottom lining plate 300 are only provided with the abrasion-resistant metal layer on the exposed surfaces, and the rest parts can be made of conventional metals, and the comprehensive manufacturing cost of the semi-autogenous mill can be reduced due to the fact that the production cost of the abrasion-resistant metal is high.

In some alternative embodiments, as shown in fig. 2, the portion of the lifting bar 200 where the rubber liner 100 is not adhered is further provided with an arc surface 240 between the first side plane 220 and the second side plane 230, where the angle β2 between the tangent line where the first side plane 220 meets the arc surface 240 and the top surface 210 is consistent with the range of inclination angle β1 of the second side plane 230, and preferably, the range of inclination angles β1 and β2 is 5 ° to 90 °. The higher the lifting strip 200 is, the closer the angle beta is to be vertical, the more the abrasion loss of mineral aggregate is, which is beneficial to prolonging the service life of the composite lining board, and the stronger the lifting capability to mineral aggregate and grinding media is, the larger the impact of the composite lining board on the dropping and throwing is, the phenomenon of smashing the lining board is easy to occur, and the bottom lining board needs to be designed to be thicker; so set up, during initial ore grinding operation, the height of lifting bar 200 is higher, and is obvious to mineral aggregate and ore grinding medium's lifting action, along with the height after lifting bar 200 is worn and gradually reduce, then lifting bar 200 width and angle beta grow to this result in the stability of the result of use of guaranteeing compound welt.

Since the higher the height of the lifting bar 200, the more nearly vertical the angle β, the greater the lifting capacity for mineral material and grinding media, and the greater the impact of the composite liner on the drop and throw, and the tendency for the phenomenon of cracking the liner to occur, the bottom liner 300 is designed to be more massive, and in some alternative embodiments, the height of the lifting bar 200 is preferably set to 150-500 mm, with the minimum width B greater than 80mm, the maximum width C greater than 200mm, and the height of the bottom liner 300 set to 60-200 mm.

Alternatively, the cross section of the bottom liner 300 is rectangular. In some alternative embodiments, as shown in fig. 2, the cross section of the backing plate 300 is preferably L-shaped, that is, the backing plate 300 is protruded upwards to form the wear-resistant protrusions 320, the height of the wear-resistant protrusions 320 is not higher than that of the lifting bars 200, and the exposed surfaces of the wear-resistant protrusions 320 are also compounded with a wear-resistant alloy layer, which can improve the lifting effect of the lifting bars 200 and the breaking effect of the semi-autogenous mill. Because the diameter of the cylinder of the semi-autogenous mill is larger, the diameter of the ore grinding steel ball is larger (usually more than 100 mm), the impact force of the ore grinding steel ball on the composite lining plate is large, if the distance between the adjacent bottom lining plates 300 arranged on the cylinder is larger, the abrasion of the lifting bar 200 is easy to be aggravated in the later stage of the use of the composite lining plate, if the section of the bottom lining plate 300 is designed into an L shape, the bottom lining plate 300 becomes thicker, the impact capacity of anti-mineral materials and the ore grinding steel ball is increased, and the service life of the bottom lining plate 300 is prolonged; secondly, the function of the wear-resistant protrusions 320 on the composite lining plate is equivalent to that of one lifting bar 200 when the lifting bar 200 is worn to the later stage, so that the wear allowance of the composite lining plate is improved, the wear of the lifting bar 200 is slowed down, and the abrasion of the composite lining plate is stable in the whole service cycle; thirdly, the semi-autogenous mill is large in diameter and small in length, the influence of the increase of the peak height of the composite lining plate on the processing capacity of the mill is small, the wear-resistant protrusions 320 can be designed to be higher at the moment, the lifting effect of the composite lining plate is improved, and the wear allowance of the composite lining plate is further improved.

In some alternative embodiments, as shown in fig. 2-3, the cross-section of the inner cavity of the mounting seat 121 is in the shape of a shoe-shaped gold ingot, specifically, the upper cavity of the mounting seat 121 is in the shape of a large-sized conical or elliptical cone, and the lower cavity is in the shape of a small-sized cylinder. In the specific assembly, the mounting seat 121 is provided with a protrusion so as to be conveniently embedded into the notch of the metal framework 110 for positioning welding. Alternatively, the material of the mounting base 121 may be cast steel.

To facilitate removal of the composite liner, in some alternative embodiments, as shown in fig. 1 and 4, a lifting tab 111 is welded to the metal armature 110, the lifting tab 111 extending from the rubber liner 100 and being positioned between the lifting bar 200 and the bottom liner 300.

As shown in FIG. 5, the utility model also provides a semi-autogenous mill, which comprises a cylinder 400, wherein the composite lining plates are circumferentially arranged on the inner wall of the cylinder 400, and the composite lining plates are designed into one block by installation due to the limited operation space in the cylinder 400, so that the semi-autogenous mill is convenient to disassemble and assemble and is convenient to inspect and maintain. In order to prevent the slurry in the cylinder 400 from leaking from the gap of the composite packing, as shown in fig. 6, an inclined portion 130 is provided at the bottoms of the left and right sides of the rubber packing 100, and a rubber stopper 500 is provided between the bottom sides of the adjacent rubber packing 100 when assembled.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A composite liner for use in a semi-autogenous mill, the composite liner comprising:

A rubber lining body, in which a metal skeleton is coated;

The lifting strip is adhered to one side of the rubber lining body, a first wear-resistant metal layer is arranged on the part, which is not adhered to the rubber lining body, of the lifting strip, and a top surface, a first side plane and a second side plane which is obliquely arranged at an angle of 5-90 degrees with the top surface are formed on the first wear-resistant metal layer; the rubber lining body is also provided with a mounting hole, and a mounting seat connected with the metal framework is arranged in the mounting hole;

And the bottom lining plate is adhered to the other side of the rubber lining body opposite to the lifting strip, the height of the bottom lining plate is lower than that of the lifting strip, and a second wear-resistant metal layer is arranged on the part of the bottom lining plate, which is not adhered to the rubber lining body.

2. The composite liner of claim 1, wherein the portion of the lifting bar not bonded to the rubber liner is further provided with an arcuate surface between the first side surface and the second side surface, wherein the included angle between the tangent line at the junction of the first side surface and the arcuate surface and the top surface is in accordance with the range of inclination angles of the second side surface.

3. A composite liner according to claim 1 or claim 2 wherein the lifting straps have a height of 150 to 500mm and a minimum width of greater than 80mm and a maximum width of greater than 200mm.

4. A composite backing plate according to claim 1 or 2, wherein the height of the backing plate is 60 to 200mm.

5. A composite liner according to claim 1 or claim 2, wherein the cross-section of the base liner is rectangular.

6. A composite liner according to claim 1 or claim 2, wherein the cross-section of the base liner is L-shaped.

7. The composite liner of claim 1 or 2, wherein the cross-section of the interior cavity of the mount is shoe-shaped.

8. The composite liner of claim 1 wherein the metal armature is provided with lifting lugs extending from the rubber liner body.

9. A semi-autogenous mill, comprising a cylinder, wherein the composite lining plate as claimed in any one of claims 1 to 8 is arranged in a circumferential array on the inner wall of the cylinder.

10. A semi-autogenous mill as claimed in claim 9 wherein rubber plugs are filled between adjacent said composite liners.