A grinding roller, a grinding roller assembly and a Raymond mill applied to the Raymond mill

Abstract

The utility model discloses a kind of mill roller, mill roller assembly and raymond mill applied to raymond mill;The mill roller applied to raymond mill includes support part and grinding part, the grinding part is assembled on the support part;The grinding part is equipped with first grinding surface and second grinding surface;The first grinding surface is configured to form surface contact with the grinding surface of mill disc ring in the raymond mill when grinding;The second grinding surface is configured to shear the shear angle of material when grinding is 15~35 degrees.The mill roller, mill roller assembly and raymond mill of the utility model are suitable for being used to crush gold tailings in gold tailings resource utilization.

Description

Technical Field

[0001] This utility model relates to the field of Raymond milling machine technology, specifically to a grinding roller, grinding roller assembly, and Raymond milling machine. Background Technology

[0002] In the technology for the resource utilization of gold tailings, grinding mills are required for tailings grinding, such as vertical Raymond mills. However, the current Raymond mills are limited by their crushing effect and efficiency, resulting in a low recovery rate of gold and other precious metals in downstream processes. Therefore, it is urgent to further improve the crushing effect and efficiency of current Raymond mills to make them more suitable for the resource utilization of gold tailings. Utility Model Content

[0003] Grinding rollers and roller assemblies are the core components of Raymond mills. For a list of standard grinding rollers for Raymond mills, please refer to [link to Raymond mill specifications]. Figure 1 The grinding process is carried out jointly by the rotating standard grinding roller 100 and the fixed grinding disc ring 200. This utility model improves the grinding roller structure and proposes a grinding roller, grinding roller assembly, and Raymond grinding mill for use in Raymond grinding mills. This grinding roller, grinding roller assembly, and Raymond grinding mill are more suitable for grinding gold tailings in the gold tailings resource utilization technology.

[0004] The first aspect of this utility model provides a grinding roller for use in a Raymond mill, comprising a support portion and a grinding portion, wherein the grinding portion is mounted on the support portion; the grinding portion is provided with a first grinding surface and a second grinding surface; the first grinding surface is configured to form surface contact with the grinding surface of the grinding disc ring in the Raymond mill during grinding; the second grinding surface is configured to shear the material at a shearing angle of 15 to 35 degrees during grinding.

[0005] In one optional embodiment, the first grinding surface is an arc surface and the radius of the arc surface is the same as the inner circle radius of the grinding disc ring.

[0006] In one alternative embodiment, the second grinding surface is connected to one end of the first grinding surface, and the second grinding surface extends circumferentially away from the grinding disc ring from the one end.

[0007] Furthermore, there are two second grinding surfaces, which are respectively connected to the two ends of the first grinding surface, and the two second grinding surfaces are symmetrically arranged relative to the first grinding surface.

[0008] In one alternative embodiment, the second grinding surface is an inclined plane or a curved surface.

[0009] In one alternative embodiment, a connecting portion is integrally formed on the grinding part, and the grinding part is assembled to the support part through the connecting portion.

[0010] Furthermore, the connecting part is inserted into the supporting part, and the fixing pin passes through the supporting part and the connecting part to fix the connecting part and the supporting part.

[0011] Furthermore, the support portion is provided with a channel adapted to the connecting portion, and the connecting portion is inserted into the channel; the fixing pin passes vertically through the support portion and the connecting portion along the pin hole provided on the support portion; the direction of the fixing pin is parallel to the central axis of the grinding disc ring, one end of the fixing pin is located inside the support portion, and the other end is located inside or outside the support portion, and the other end is equipped with a limiting member to prevent the fixing pin from falling off.

[0012] The second aspect of this utility model provides a grinding roller assembly, including a grinding roller bracket and a plurality of grinding rollers mounted on the grinding roller bracket; the grinding rollers are as described above; the grinding roller bracket is configured to drive the grinding rollers to rotate when driven.

[0013] The third aspect of this utility model provides a Raymond mill, which includes the grinding roller assembly as described above.

[0014] The technical solution provided by this utility model can include the following beneficial effects: The grinding section of this utility model's grinding roller is equipped with a first grinding surface and a second grinding surface. The first grinding surface is configured to form surface contact with the grinding surface of the grinding disc ring in the Raymond mill during grinding. Surface contact makes it easier to flatten the soft precious metal particles (such as gold particles) wrapped in solid particles. In the resource utilization of gold tailings, the flattened gold particles are easier to separate in the downstream separation process. The second grinding surface is configured to shear the material at a shear angle of 15 to 35 degrees during grinding. Compared with the standard grinding roller, a shear angle of 15 to 35 degrees generates a relatively large horizontal shear force, making it easier to break open the outer coating of the precious metal particles, thereby improving the crushing effect and efficiency of gold tailings.

[0015] Therefore, the grinding roller, grinding roller assembly and Raymond mill of this invention are more likely to flatten the soft precious metal particles (such as gold particles) wrapped in solid particles, and are more likely to break open the outer wrapping of the precious metal particles. They are suitable for crushing gold tailings in the resource utilization technology of gold tailings.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0017] The above and other objects, features and advantages of the present invention will become more apparent from the description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components.

[0018] Figure 1 A schematic diagram of grinding using the standard grinding rollers of a Raymond mill; Figure 2 This is a schematic diagram of the grinding section shown in an embodiment of the present invention. Figure 3 for Figure 1 and Figure 2 Superimposed grinding diagrams as shown; Figure 4 This is a schematic diagram of the structure of the grinding roller shown in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the assembled grinding roller shown in an embodiment of the present invention; Figure 6 This is a schematic diagram of the unassembled grinding roller shown in an embodiment of the present invention.

[0019] In the figure, there is a standard grinding roller 100, a standard grinding roller support 110, a grinding disc ring 200, a support 310, a grinding part 320, a first grinding surface 321, a second grinding surface 322, a connecting part 323, a fixing pin 324, a limiting part 325, and solid particles 400. Detailed Implementation

[0020] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be more thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0021] The technical solutions and effects of the embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0022] Please see Figure 2-6 This utility model provides a grinding roller for use in a Raymond mill, including a support part 310 and a grinding part 320, wherein the grinding part 320 is mounted on the support part 310; the grinding part 320 is provided with a first grinding surface 321 and a second grinding surface 322; the first grinding surface 321 is configured to form surface contact with the grinding surface of the grinding disc ring 200 in the Raymond mill during grinding; the second grinding surface 322 is configured to shear the material at a shearing angle of 15 to 35 degrees during grinding.

[0023] The first grinding surface 321 is configured to form a surface contact with the grinding surface of the grinding disc ring 200 in the Raymond mill during grinding. The surface contact makes it easier to flatten the soft precious metal particles (such as gold particles) wrapped in solid particles. In the resource utilization of gold tailings, the flattened gold particles are more easily separated in the downstream separation stage using specially designed separation equipment.

[0024] The second grinding surface 322 is configured to shear the material at a shearing angle of 15 to 35 degrees during grinding. Compared with the standard grinding roller 100, the shearing angle of 15 to 35 degrees will generate a greater horizontal shearing force, making it easier to break open the outer coating of precious metal particles, thereby improving the crushing effect and crushing efficiency of gold tailings.

[0025] To further increase the contact area between the first grinding surface 321 and the grinding ring 200, one possible design for the first grinding surface 321 is that it is an arc surface with a radius matching that of the grinding ring 200. In this way, the surface contact area is the area of ​​the first grinding surface 321.

[0026] In some embodiments, one option for the second grinding surface 322 is that the second grinding surface 322 is connected to one end of the first grinding surface 321, and the second grinding surface 322 extends circumferentially away from the grinding ring 200 from said one end. The second grinding surface 322 may be an inclined plane or a curved surface.

[0027] The second grinding surface 322 is located at both ends of the grinding disc ring 200 along the circumference. The end closer to the grinding disc ring 200 is called the proximal end, and the end farther away from the grinding disc ring 200 is called the distal end. The proximal end is also the end where the second grinding surface 322 is connected to the first grinding surface 321. The first grinding surface 321 formed from the proximal end to the distal end is used to generate extrusion and shear force on the solid particles 400.

[0028] In some embodiments, the included angle between the second grinding surface 322 and the first grinding surface 321 is 145 to 160 degrees.

[0029] In some embodiments, the number of second grinding surfaces 322 is two, and the two second grinding surfaces 322 are symmetrically arranged relative to the first grinding surface 321. Specifically, the proximal ends of the two second grinding surfaces 322 are respectively connected to the two ends connected by the first grinding surface 321, and extend from the proximal end to the distal end.

[0030] In some embodiments, a connecting portion 323 is integrally formed on the grinding part 320, and the grinding part 320 is assembled onto the support part 310 through the connecting portion 323. Specifically, the connecting portion 323 is inserted into the support part 310, and a fixing pin 324 passes through the support part 310 and the connecting portion 323, thereby fixing the connecting portion 323 and the support part 310 together. More specifically, the support part 310 is provided with a channel adapted to the connecting portion 323, and the connecting portion 323 is inserted into the channel; the fixing pin 324 passes perpendicularly through the support part 310 and the connecting portion 323 along a pin hole provided on the support part 310; the fixing pin 324 is parallel to the central axis of the grinding disc ring 200, one end of the fixing pin 324 is located inside the support part 310, and the other end is located inside or outside the support part 310, and the other end is equipped with a limiting member 325, such as a C-shaped stop ring, to prevent the fixing pin 324 from falling off, thereby fixing the grinding part 320 onto the support part 310.

[0031] By aligning the retaining pin 324 parallel to the central axis of the grinding disc ring 200 and with one end of the retaining pin 324 located within the support portion 310, the retaining pin 324 can be protected from abrasion by solid particles 400 during the grinding process. As a preferred embodiment, the retaining pin 324 is configured such that the other end is also located within the support portion 310, and a limiting member 325 is installed at this other end. Specifically, the limiting member 325 is fitted within the channel, and a stop ring can be used within the hole for the limiting member 325. This further prevents the limiting member 325 from being abraded or even detached by solid particles 400 during the grinding process.

[0032] In some embodiments, the support portion 310 can be obtained by modifying the standard grinding roller support portion 110. Specifically, the standard grinding roller support portion 110 is a solid cylinder. A fan-shaped mounting platform is milled into the cylinder of the standard grinding roller support portion 110. A channel adapted to the connecting portion 323 is drilled from the bottom end of the mounting platform inward. A pin hole is drilled perpendicular to the channel, penetrating the cylinder and the channel. The grinding portion 320 is assembled onto the modified standard grinding roller support portion 110 via the connecting portion 323. The specific assembly method is the same as described above and will not be repeated here.

[0033] The following will combine Figure 1-3 The technical effects of the embodiments of this utility model will be further explained.

[0034] like Figure 1 As shown, in related technologies, a rotating standard grinding roller 100 and a fixed grinding disc ring 200 jointly grind solid particles 400. The standard grinding roller 100 is a hollow cylinder and is mounted on a solid cylindrical standard grinding roller support 110. The outer wall of the standard grinding roller 100 forms a grinding surface. Figure 2As shown, in this embodiment of the invention, the solid particles 400 are ground together by the rotating grinding section 320 and the fixed grinding disc ring 200. In related technologies, the contact between the standard grinding roller 100 and the grinding disc ring 200 is a narrow line contact. In this embodiment of the invention, the contact between the first grinding surface 321 of the grinding section 320 and the grinding disc ring 200 is a wide surface contact, which can compress a larger number of soft precious metal particles (such as gold particles) into a flat shape.

[0035] The following will combine Figure 3 This paper analyzes the forces acting on solid particles during the grinding process and defines the shear angle. During grinding, solid particles 400 are subjected to shear force from the second grinding surface 322, and the direction of this shear force is along the second grinding surface 322. In this embodiment of the invention, the shear angle is described as follows: The shear angle refers to the angle formed between the second grinding surface 322 and the grinding surface of the grinding disc ring 200 during the grinding operation; specifically, the second grinding surface 322 extends to intersect with the grinding surface, and a tangent is formed between the second grinding surface 322 and the grinding surface in the direction of the grinding roller movement. The angle formed between the second grinding surface 322 and the tangent is the shear angle.

[0036] When the shear angle is relatively small, there is a relatively large horizontal shear force, which makes it easier to break open the outer coating of the precious metal particles; and at a relatively small shear angle, the solid particles 400 are more easily entrained into the first grinding surface 321. At the first grinding surface 321, the shear force continues to act to break open the solid particles 400; on the other hand, the centrifugal force acts perpendicularly on the solid particles 400, squeezing and breaking the outer coating of the solid particles 400, and flattening the soft precious metal particles (such as gold particles) they are encased in.

[0037] Compared with related technologies, the shear angle 'a' of the standard grinding roller 100 on the solid particles 400 is relatively larger than the shear angle 'b' of the second grinding surface 322. Therefore, this embodiment of the invention has a relatively small shear angle and a relatively large horizontal shear force. The shear angle 'a' of the standard grinding roller 100 on the solid particles 400 is mostly 45 degrees. When 'b' is configured to 30 degrees, the horizontal shear force of the second grinding surface 322 can increase by approximately 22% relative to the standard grinding roller 100. Thus, this embodiment of the invention obviously has superior crushing effect, crushing efficiency, and entanglement effect.

[0038] The grinding roller assembly, as a core working component of the Raymond mill, works in conjunction with the grinding disc ring 200 to compress and grind solid particles. The grinding roller assembly provided in this embodiment includes a grinding roller bracket and several grinding rollers mounted on the bracket, wherein the grinding rollers are as described above; the grinding roller bracket is configured to drive the grinding rollers to rotate when driven. Depending on the specifications of the Raymond mill, the number of grinding rollers is typically 3-6.

[0039] The Raymond mill provided in this embodiment of the invention includes the grinding roller assembly as described above. On one hand, the Raymond mill of this embodiment more easily flattens soft precious metal particles (such as gold particles) encased in solid particles, making these flattened gold particles easier to separate in the downstream separation stage using specialized separation equipment during the resource utilization of gold tailings. On the other hand, the Raymond mill of this embodiment can generate greater horizontal shear force, making it easier to break open the outer encapsulation of precious metal particles, significantly improving the crushing effect and efficiency. Therefore, the grinding roller, grinding roller assembly, and Raymond mill described above are suitable for crushing gold tailings in the resource utilization technology of gold tailings.

[0040] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A grinding roller used in a Raymond mill, characterized in that: It includes a support part and a grinding part, wherein the grinding part is assembled on the support part; The grinding section is provided with a first grinding surface and a second grinding surface; The first grinding surface is configured to form surface contact with the grinding surface of the grinding disc ring in the Raymond mill during grinding; The second grinding surface is configured to shear the material at an angle of 15 to 35 degrees during grinding.

2. The grinding roller for use in a Raymond mill as described in claim 1, characterized in that: The first grinding surface is an arc surface and the radius of the arc surface is the same as the inner circle radius of the grinding disc ring.

3. The grinding roller for use in a Raymond mill as described in claim 1, characterized in that: The second grinding surface is connected to one end of the first grinding surface, and the second grinding surface extends from the first end along the circumference of the grinding disc ring in a direction away from the grinding disc ring.

4. The grinding roller for use in a Raymond mill as described in claim 3, characterized in that: The number of the second grinding surfaces is 2, which are respectively connected to the two ends of the first grinding surface, and the two second grinding surfaces are symmetrically arranged relative to the first grinding surface.

5. The grinding roller for use in a Raymond mill as described in claim 3, characterized in that: The second grinding surface is an inclined plane or a curved surface.

6. The grinding roller for use in a Raymond mill as described in claim 1, characterized in that: The grinding part has an integrally formed connecting part, and the grinding part is assembled to the support part through the connecting part.

7. The grinding roller for use in a Raymond mill as described in claim 6, characterized in that: The connecting part is inserted into the supporting part, and the fixing pin passes through the supporting part and the connecting part to fix the connecting part and the supporting part.

8. The grinding roller for use in a Raymond mill as described in claim 7, characterized in that: The support portion is provided with a channel that matches the connecting portion, and the connecting portion is inserted into the channel; the fixing pin passes vertically through the support portion and the connecting portion along the pin hole provided on the support portion; the direction of the fixing pin is parallel to the central axis of the grinding disc ring, one end of the fixing pin is located inside the support portion, and the other end is located inside or outside the support portion and the other end is equipped with a limiting member to prevent the fixing pin from falling off.

9. A grinding roller assembly, characterized in that: It includes a grinding roller support and a plurality of grinding rollers mounted on the grinding roller support; the grinding rollers are the grinding rollers according to any one of claims 1-8; the grinding roller support is configured to drive the grinding rollers to rotate when driven.

10. A Raymond mill, characterized in that: Includes the grinding roller assembly as described in claim 9.

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