Mineral powder roller type grinding device

Abstract

The utility model discloses a mineral powder roller type grinding device which comprises grinding outer cylinders, a mineral feeding hopper and a mineral powder discharging hopper which are arranged in a stacked mode, every two adjacent grinding outer cylinders are detachably connected, a fixed grinding disc is arranged in each grinding outer cylinder, a grinding cavity is formed in the fixed grinding discs in a penetrating mode, and the grinding cavity is gradually widened from the two ends to the middle. A rotary grinding disc is correspondingly arranged in each grinding cavity, a grinding gap is formed between each rotary grinding disc and the corresponding grinding cavity, each grinding gap is gradually reduced from top to bottom, and a grinding power device penetrates through each rotary grinding disc; the corresponding number of fixed grinding discs are selected and used according to the ore grinding requirement, the fixed grinding discs and the rotating grinding discs are different in abrasion speed, only part of the fixed grinding discs and the rotating grinding discs which are seriously abraded are replaced conveniently through detachable arrangement of the fixed grinding discs and the rotating grinding discs, and therefore the maintenance cost is reduced, the grinding matching area between the fixed grinding discs and the rotating grinding discs is large, and the grinding efficiency is improved. And the grinding efficiency can be improved, and the grinding effect can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to mineral aggregate grinding equipment technical field especially relates to a mineral powder roller type grinding device. BACKGROUND

[0002] The ore contains rich metal minerals or nonmetallic minerals that can be utilized, wherein the metal minerals are magnetite, hematite and the like in iron ore, chalcocite, bornite and the like in copper ore, natural gold and the like in gold ore; the nonmetallic minerals are graphite, quartz, feldspar and the like. If the above useful minerals are to be extracted from the ore, the ore needs to be ground into small pieces by a grinding machine after being mined, and the main purpose of ore grinding is to maximize the dissociation of useful minerals and gangue minerals in the ore so as to provide materials meeting the requirements for subsequent beneficiation operations. After the ore is ground, its particle size will be greatly reduced, and it can even be ground into powder to improve the efficiency and effect of beneficiation.

[0003] The grinding machine gradually grinds the ore small or even into powder by cooperation of the grinding rollers, grinding cylinders and grinding teeth installed inside. According to the types of ores, some ores have extremely high hardness, which causes the grinding teeth to wear out quickly. Moreover, the current grinding teeth are fixed on the surface of the grinding cylinder in a dense manner. When the grinding efficiency and quality cannot be guaranteed due to serious wear of the grinding teeth, the entire grinding cylinder and the grinding teeth fixed on its surface need to be replaced, which is not conducive to saving the maintenance cost of the grinding machine. Moreover, the grinding area of the current grinding teeth is small when they cooperate with each other, which is not conducive to improving the grinding efficiency. SUMMARY

[0004] The utility model provides a kind of mineral powder roller type grinding device with large grinding surface, which helps to improve grinding efficiency and reduce maintenance cost.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a mineral powder roller type grinding device includes a plurality of grinding outer cylinders stacked from top to bottom. A mineral ore feeding hopper is detachably arranged at the top end of the topmost grinding outer cylinder. A mineral powder discharging hopper is arranged below the bottommost grinding outer cylinder. Adjacent two grinding outer cylinders are detachably connected. Each grinding outer cylinder is correspondingly provided with a fixed grinding disc. A hollow grinding cavity is arranged through the fixed grinding disc, and the grinding cavity is gradually widened from both ends to the middle. Each grinding cavity is correspondingly provided with a rotating grinding disc. A grinding gap is formed between the rotating grinding disc and the inner wall of the corresponding grinding cavity, and each grinding gap is gradually reduced from top to bottom. A grinding power device is detachably assembled through each rotating grinding disc.

[0006] As a preferred technical scheme, the grinding outer cylinder comprises two outer cylinder halves which are arranged in abutment, and the two outer cylinder halves are in the shape of a cylinder after being arranged in abutment, and each outer cylinder half is provided with a protruding outer cylinder connecting arc plate on the outer wall thereof, and a connecting locking piece is detachably arranged through the outer cylinder connecting arc plate.

[0007] As a preferred technical scheme, the fixed grinding disc comprises a grinding disc half which is arranged in correspondence with the outer cylinder half, and each grinding disc half is detachably assembled with the corresponding outer cylinder half.

[0008] As a preferred technical scheme, the inner wall of the outer cylinder half is uniformly provided with an assembly protrusion, and the outer wall of the grinding disc half is provided with an assembly groove which is limitedly matched with the assembly protrusion.

[0009] As a preferred technical scheme, the bottom end of the grinding outer cylinder located at the bottom is provided with a reinforced support cylinder, and the ore powder discharge hopper is detachably arranged at the bottom end of the reinforced support cylinder.

[0010] As a preferred technical scheme, the upper end of the grinding power device is connected to the grinding outer cylinder located at the top through a mounting bracket, and the lower end of the grinding power device is supported on the inner wall of the reinforced support cylinder.

[0011] As a preferred technical scheme, the grinding power device comprises a grinding vertical shaft, a driving motor is drivingly connected to the top end of the grinding vertical shaft, each rotating grinding disc is sequentially and limitingly assembled on the grinding vertical shaft, and an anti-falling shaft sleeve is arranged in abutment with the rotating grinding disc located at the bottom, and the anti-falling shaft sleeve is detachably arranged with the grinding vertical shaft.

[0012] As a preferred technical scheme, the upper and lower ends of the grinding vertical shaft are respectively rotatably assembled with support bearings, and a vertical shaft support rod is arranged and connected between the support bearing located at the upper end and the ore feeding hopper, and between the support bearing located at the lower end and the inner wall of the reinforced support cylinder.

[0013] As an improvement of the above technical scheme, a height-raising supporting leg is arranged and mounted on the periphery of the reinforced support cylinder.

[0014] As an improvement of the above technical scheme, the surface of the rotating grinding disc is arranged with protrusions or grooves for increasing friction.

[0015] Due to the adoption of the above technical scheme, the ore powder roller type grinding device comprises a plurality of grinding outer cylinders which are stacked from top to bottom, a top end of the grinding outer cylinder at the top is detachably provided with an ore feeding hopper, a lower side of the grinding outer cylinder at the bottom is provided with an ore powder discharging hopper, two adjacent grinding outer cylinders are detachably connected, each of the grinding outer cylinders is correspondingly provided with a fixed grinding disc, a hollow grinding cavity is arranged through the fixed grinding disc, the grinding cavity is gradually widened from both ends to the middle, each of the grinding cavities is correspondingly provided with a rotating grinding disc, a grinding gap is formed between the rotating grinding disc and the inner wall of the corresponding grinding cavity, each of the grinding gaps is gradually reduced from top to bottom, and a grinding power device is detachably assembled through each of the rotating grinding discs. BRIEF DESCRIPTION OF DRAWINGS

[0016] The following drawings are merely intended to schematically illustrate and explain the present application and do not limit the scope of the present application. Among them:

[0017] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0018] Figure 2 is a structural schematic diagram of a fixed grinding disc of an embodiment of the present application;

[0019] Figure 3 is a structural schematic diagram of a rotating grinding disc and related components of an embodiment of the present application;

[0020] In the figure: 1-grinding outer cylinder; 101-outer cylinder half; 102-outer cylinder connecting arc plate; 103-connection locking piece; 2-ore feeding hopper; 3-ore powder discharging hopper; 4-fixed grinding disc; 41-grinding disc half; 5-grinding cavity; 6-rotating grinding disc; 7-grinding gap; 8-assembly protrusion; 9-assembly groove; 10-strengthening support cylinder; 11-mounting bracket; 12-elevating support leg; 13-grinding vertical shaft; 14-driving motor; 15-grinding disc shaft sleeve; 16-anti-dropping shaft sleeve; 17-support bearing; 18-vertical shaft support rod. DETAILED DESCRIPTION

[0021] The utility model is further illustrated below in combination with the drawings and embodiments. In the following detailed description, certain exemplary embodiments of the utility model are described by way of illustration only. It is needless to say that those skilled in the art can recognize that the described embodiments can be modified in various ways without departing from the spirit and scope of the utility model. Therefore, the drawings and description are illustrative in nature and are not used to limit the protection scope of the claims.

[0022] As Figure 1 , Figure 2 and Figure 3 shown, the ore powder roller type grinding device is used for gradually grinding ore materials from large pieces into small pieces until the ore materials are ground into ore powder and output. Specifically, a plurality of grinding outer cylinders 1 are arranged in layers from top to bottom, a top end of the grinding outer cylinder 1 at the top is detachably provided with an ore feeding hopper 2, which can be matched with an ore elevator to realize automatic feeding of ores during the grinding process. A bottom of the grinding outer cylinder 1 is provided below with an ore powder discharge hopper 3 for outputting the ground ore materials.

[0023] The adjacent two grinding outer cylinders 1 are detachably connected, each of the grinding outer cylinders 1 is correspondingly provided with a fixed grinding disc 4, and the number of the grinding outer cylinders 1 and the fixed grinding discs 4 can be set according to the size requirement of ore grinding. A hollow grinding cavity 5 is provided through the fixed grinding disc 4, and the grinding cavity 5 is gradually widened from both ends to the middle, each of the grinding cavities 5 is correspondingly provided with a rotating grinding disc 6, and a grinding gap 7 is formed between the rotating grinding disc 6 and the inner wall of the corresponding grinding cavity 5. During grinding, the ore materials travel from top to bottom in each of the grinding gaps 7, and under the rotation of the rotating grinding disc 6, the grinding of the materials is realized by the cooperation of the peripheral wall of the rotating grinding disc 6 and the grinding cavity 5, and the surface of the rotating grinding disc can be arranged with protrusions or grooves for increasing friction, which helps to improve the grinding efficiency.

[0024] In the embodiment, each of the grinding gaps 7 is gradually reduced from top to bottom, so that the volume of the ore materials gradually decreases from top to bottom during the grinding process, thereby realizing the staged grinding of the ore materials and ensuring the grinding quality. A grinding power device is detachably assembled through each of the rotating grinding discs 6, and under the driving of the grinding power device, the synchronous rotation of each of the rotating grinding discs 6 is realized to grind the ore materials. In the above design, in order to facilitate the replacement of the rotating grinding disc 6 and the fixed grinding disc 4 after wear, the maximum size of the rotating grinding disc 6 needs to be smaller than the minimum size of the grinding cavity 5, which is only suitable for the occasion where the volume of the ground ore materials is slightly larger.

[0025] In order to eliminate the replacement obstacles of the rotating grinding disc 6 and the fixed grinding disc 4 after wearing, increase the maximum size of the rotating grinding disc 6, and minimize the grinding gap 7 at the bottom, the grinding outer cylinder 1 of the embodiment comprises two outer cylinder halves 101 arranged in abutment, which are in the shape of a cylinder after abutment. The outer walls of each outer cylinder half 101 are respectively provided with protruding outer cylinder connecting arc plates 102. The connecting locking members 103 are detachably arranged through the outer cylinder connecting arc plates 102. The connecting locking members 103 can be commonly used bolts and nut matching members, so that the disassembly and assembly of the upper and lower outer cylinder halves 101 are simple and convenient. In actual use, the connecting locking members 103 of each layer can be staggered to improve the fixation of the entire device after connection. Correspondingly, the fixed grinding disc 4 comprises grinding disc halves 41 arranged correspondingly to the outer cylinder halves 101.

[0026] Each grinding disc half 41 is detachably assembled with the corresponding outer cylinder half 101. Specifically, the inner walls of the outer cylinder halves 101 are uniformly provided with assembly protrusions 8, which extend upward and downward along the inside of the outer cylinder halves 101. The outer walls of the grinding disc halves 41 are provided with assembly grooves 9 limiting the assembly protrusions 8. The grinding disc halves 41 and the corresponding outer cylinder halves 101 are convenient to disassemble and assemble, and the worn grinding disc halves 41 are convenient to replace. During the entire grinding process of the ore material, the wear rates of the fixed grinding discs 4 are different due to the different sizes of the ore materials at each grinding level. The detachable connection mode of the outer cylinder halves 101 can realize the replacement of only part of the grinding disc halves 41 with serious wear, thereby reducing the maintenance cost.

[0027] The bottom end of the grinding outer cylinder 1 at the bottom is provided with a reinforcing support cylinder 10, which is detachably assembled with the abutting grinding outer cylinder 1. The reinforcing support cylinder 10 can support each layer of the grinding outer cylinder 1 above it to improve the stability of the use of each grinding outer cylinder 1. The upper end of the grinding power device is connected to the top grinding outer cylinder 1 through a mounting bracket 11, and the lower end of the grinding power device is supported on the inner wall of the reinforcing support cylinder 10. The ore powder discharge hopper 3 is detachably arranged at the bottom end of the reinforcing support cylinder 10 to facilitate the disassembly and assembly of the grinding power device. The reinforcing support cylinder 10 is arranged with heightening legs 12 on the side to make the ore powder discharge hopper 3 have a certain height to facilitate the assembly and use of other discharge conveying equipment. The heightening legs 12 can be fixed to the ground through foundation bolts to ensure the stability of the use of the entire device.

[0028] The grinding power device comprises a grinding vertical shaft 13, the top end of the grinding vertical shaft 13 is drivingly connected with a driving motor 14, the driving motor 14 is fixedly installed by means of the mounting support 11, and each rotating grinding disc 6 is sequentially and limitingly assembled on the grinding vertical shaft 13. Specifically, a grinding disc shaft sleeve 15 is fixedly arranged through the rotating grinding disc 6, the grinding disc shaft sleeve 15 is assembled by the cooperation of keys and key grooves with the grinding vertical shaft 13, and synchronous rotation of the rotating grinding disc 6 is realized under the rotation of the grinding vertical shaft 13. The upper and lower ends of the grinding disc shaft sleeve 15 extend to the outside of the rotating grinding disc 6 respectively, so as to be connected with the grinding disc shaft sleeve 15 on the adjacent rotating grinding disc 6, so as to adapt to the spacing of the adjacent two rotating grinding discs 6 and form support. The rotating grinding disc 6 located at the bottom abuts against an anti-coming-off shaft sleeve 16, the anti-coming-off shaft sleeve 16 is fixedly sleeved with the grinding vertical shaft 13, and all the rotating grinding discs 6 can be supported by the anti-coming-off shaft sleeve 16. In order to ensure the longitudinal fixing effect between the rotating grinding disc 6 and the grinding vertical shaft 13, the anti-coming-off shaft sleeve 16 can also be arranged above the rotating grinding disc 6 at the top, and each anti-coming-off shaft sleeve 16 is detachably assembled on the grinding vertical shaft 13, so that the rotating grinding disc 6 can be disassembled and replaced.

[0029] In the embodiment, the upper and lower ends of the grinding vertical shaft 13 are rotatably assembled with support bearings 17, the support bearings 17 located at the upper end are arranged between the ore feeding hopper 2, the support bearings 17 located at the lower end are arranged between the inner wall of the reinforcing support cylinder 10, and vertical shaft support rods 18 are arranged between the support bearings 17 and the ore feeding hopper 2, so that the grinding vertical shaft 13 can be supported by the vertical shaft support rods 18, and stable rotation of the grinding vertical shaft 13 can be maintained during the grinding process, so that the phenomenon of swinging can be avoided.

[0030] By means of the detachable assembly of the grinding outer cylinder 1, the fixed grinding disc 4 and the rotating grinding disc 6, the number of the rotating grinding discs 6 can be set according to the specific grinding requirements of the ore materials, and the length of the anti-coming-off shaft sleeve 16 located at the bottom can be adjusted according to the specific conditions, so that the rotating grinding disc 6 can be supported when a small number of rotating grinding discs 6 are used, and the embodiment is more flexible to use.

[0031] The description of the present application is given for the purpose of example and description, and is not exhaustive or limiting to the present application. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles and practical application of the present application, and to enable those skilled in the art to understand the present application in order to design various embodiments with various modifications for specific purposes.

Claims

1. A mineral powder roller grinding device, comprising a plurality of grinding outer cylinders arranged in a stack from top to bottom, a mineral feeding hopper is detachably arranged at the top end of the grinding outer cylinder at the top, and a mineral powder discharging hopper is arranged below the grinding outer cylinder at the bottom, characterized in that: Two adjacent grinding outer cylinders are detachably connected, each of the grinding outer cylinders is correspondingly sleeved with a fixed grinding disc, a hollow grinding cavity is arranged through the fixed grinding disc, and the grinding cavity is gradually widened from both ends to the middle, each of the grinding cavities is correspondingly provided with a rotating grinding disc, a grinding gap is formed between the rotating grinding disc and the inner wall of the corresponding grinding cavity, and each of the grinding gaps is gradually reduced from top to bottom, and a grinding power device is detachably assembled through each of the rotating grinding discs.

2. The mineral powder roller mill device according to claim 1, wherein: The grinding outer cylinder comprises two outer cylinder halves which are butted to form a cylindrical shape, each of the outer cylinder halves is correspondingly provided with a protruding outer cylinder connecting arc plate on the outer wall, and a connecting locking piece is detachably arranged through the outer cylinder connecting arc plate.

3. The mineral powder roller mill device according to claim 2, wherein: The fixed grinding disc comprises a grinding disc half which is correspondingly arranged on the outer cylinder half, and each of the grinding disc halves is detachably assembled on the corresponding outer cylinder half.

4. The mineral powder roller mill device according to claim 3, wherein: The inner wall of the outer cylinder half is uniformly provided with assembly protrusions, and the outer wall of the grinding disc half is provided with assembly grooves which are limitedly matched with the assembly protrusions.

5. The mineral powder roller mill device according to claim 1, wherein: The bottom end of the grinding outer cylinder at the bottom is provided with a reinforced support cylinder, and the ore powder discharge hopper is detachably arranged at the bottom end of the reinforced support cylinder.

6. The mineral powder roller mill device according to claim 5, wherein: The upper end of the grinding power device is connected to the grinding outer cylinder at the top through a mounting bracket, and the lower end of the grinding power device is supported on the inner wall of the reinforced support cylinder.

7. The mineral powder roller mill device according to claim 6, wherein: The grinding power device comprises a grinding vertical shaft, the top end of the grinding vertical shaft is drivingly connected with a driving motor, each of the rotating grinding discs is sequentially and limitingly assembled on the grinding vertical shaft, the rotating grinding disc at the bottom abuts against an anti-falling shaft sleeve, and the anti-falling shaft sleeve is detachably arranged on the grinding vertical shaft.

8. The mineral powder roller mill device according to claim 7, wherein: The upper and lower ends of the grinding vertical shaft are respectively rotatably assembled with support bearings, the support bearing at the upper end is arranged between the ore feeding hopper and the support bearing at the lower end is arranged between the inner wall of the reinforced support cylinder and the circumferential side of the support bearing at the lower end.

9. The mineral powder roller mill device according to claim 5, wherein: The circumferential side of the reinforced support cylinder is arranged with a height-raising supporting leg.

10. The mineral powder roller mill device according to claim 1, wherein: The surface of the rotating grinding disc is arranged with protrusions or grooves for increasing friction.

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