Multi-dimensional rotary tooth crushing device

Abstract

The invention discloses a multi-dimensional rotary tooth crushing device, which belongs to the technical field of ore crushing, and comprises a stator and a rotor matched with the stator, the stator comprises a grate bar group and a rack which are distributed on the inner side wall of the stator at intervals, the grate bar group is composed of a plurality of grate bars which are distributed at equal intervals, and a grate bar gap is reserved between every two adjacent grate bars; the rotor comprises multi-dimensional spiral grooves formed in the rotor at equal intervals, a plurality of tooth grooves matched with the racks are formed in the outer side walls of the multi-dimensional spiral grooves, a rotating shaft is fixedly arranged at the center of the rotor, and the rotating shaft is connected with a driving device. According to the multi-dimensional rotary tooth crushing device, the working principle that multi-tooth micro-gap high-speed cutting and multi-dimensional curved surface driving strong turbulent flow collision machining are combined is adopted, the energy consumption is low, self-loss is avoided, and crushed mineral powder product particles are more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of ore crushing, and in particular to a multi-dimensional rotary tooth crushing device. Background Art

[0002] Various metals, especially rare metals, are usually beneficiated by flotation process, which is to crush the metal ore into pulp, and add flotation agent to the pulp to select metal compounds. Crushing and pulping of ore is the main step of flotation process. The particle size distribution of crushing and pulping has a significant impact on the flotation process. Usually, there is an optimal range of particle size distribution. Both too large and too small particles have an impact on the flotation rate: if the particles are too large, the metal compounds cannot combine with the flotation agent, cannot float, and cannot achieve flotation; if the particles are too small, it may cause the separation of the flotation products, and the metal compounds enter the waste liquid and cause losses. Another hazard of too small particles is that the tailings slurry is not easy to settle, and the tailings pond becomes swampy, which has a major safety hazard of dam breach.

[0003] Taking molybdenum ore as an example, the generally recognized optimal particle size of mineral powder is 200 to 400 mesh, that is, in the range of 0.75-0.38 mm. In actual mineral processing production, ball mills are mostly used for crushing and pulping. However, ball mills cannot accurately control the particle size distribution. Under normal circumstances, when the grinding particle size is less than 200 mesh, accounting for 90%, the ultrafine powder less than 400 mesh reaches 30%, resulting in the flotation rate of molybdenum ore being around 70%, wasting a lot of precious mineral resources. Therefore, increasing the proportion of effective flotation particle size in the ore crushing and pulping process has great economic value and resource protection value. Based on this, the present invention proposes a multi-dimensional rotary tooth crushing device. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-dimensional rotary tooth crushing device to solve the above-mentioned problems.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention discloses a multi-dimensional rotary tooth pulverizing device, comprising a stator and a rotor matched therewith;

[0007] The stator comprises a screen bar group and a rack bar which are spaced apart and distributed on the inner side wall of the stator, wherein the screen bar group is composed of a plurality of screen bars which are equally spaced apart, and screen bar gaps are left between adjacent screen bars;

[0008] The rotor comprises a multi-dimensional spiral groove equidistantly arranged on the rotor, a plurality of tooth grooves cooperating with the rack are arranged on the outer wall of the multi-dimensional spiral groove, a rotating shaft is fixedly arranged at the center position of the rotor, and the rotating shaft is connected to the driving device.

[0009] Furthermore, the size of the gap between the screen bars is 0.5-5 mm.

[0010] Furthermore, the multi-dimensional spiral groove is a nonlinear surface.

[0011] Furthermore, a gap is retained at the position where the rack and the tooth groove are meshed.

[0012] Furthermore, a crushing space is formed between the stator and the multi-dimensional spiral groove.

[0013] Furthermore, the number of the screen bars is at least three.

[0014] Furthermore, the number of the multi-dimensional spiral grooves is 2-4.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are:

[0016] The multi-dimensional rotary gear crushing device of this invention adopts the working principle of combining multi-tooth micro-gap high-speed cutting with multi-dimensional curved surface driven strong turbulence collision processing. Its energy consumption is lower than that of a ball mill, there is no self-contact loss of the grinding body, and the particles of the crushed mineral powder product are more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the structure of the multi-dimensional rotary tooth crushing device of the present invention;

[0019] Figure 2 is a schematic diagram of the stator structure;

[0020] Figure 3 is a schematic diagram of the rotor structure;

[0021] Description of reference numerals: 1. stator; 2. rotor; 3. crushing space;

[0022] 101, screen bar; 102, rack; 103, screen bar gap;

[0023] 201. Multi-dimensional spiral groove; 202. Tooth groove; 203. Rotating shaft. DETAILED DESCRIPTION

[0024] like Figure 1 As shown, a multi-dimensional rotary tooth crushing device includes a stator 1 and a rotor 2 matched therewith.

[0025] like Figure 2As shown, the stator 1 includes a screen bar group and a rack 102 which are spaced apart on the inner wall of the stator 1. The screen bar group is composed of a plurality of screen bars 101 which are equally spaced apart. The number of the screen bars 101 is at least three, and screen bar gaps 103 are left between adjacent screen bars 101. In order to improve the efficiency of the multi-dimensional rotary tooth mill, the size of the screen bar gap 103 should not be too small, and is generally controlled between 0.5-5 mm.

[0026] like Figure 3 As shown, the rotor 2 includes multidimensional spiral grooves 201 equidistantly provided on the rotor 2, the number of the multidimensional spiral grooves 201 is 2-4, and the multidimensional spiral grooves 201 are nonlinear surfaces. A plurality of tooth grooves 202 matching the rack 102 are provided on the outer wall of the multidimensional spiral groove 201, and a small gap is reserved at the meshing position of the rack 102 and the tooth groove 202. The micro-gap cutting prevents direct contact between the cutters, avoids self-consumption of energy of the cutters, and further improves the efficiency of crushing. A rotating shaft 203 is fixedly installed at the center of the rotor 2, and the rotating shaft 203 is connected to the driving device.

[0027] A crushing space 3 is formed between the stator 1 and the multi-dimensional spiral groove 201. The ore particles enter the crushing space 3. Driven by the high-speed rotation of the multi-dimensional curved surface, the material moves and collides at a high speed in the crushing space 3. The movement speed of the material particles in the crushing space 3 is hundreds to thousands of times that of the mill. The probability of converting kinetic energy into fracture potential energy is greatly improved, and the crushing energy consumption is greatly reduced.

[0028] The action process of the present invention is as follows:

[0029] First, the driving device drives the rotor 2 to rotate at a high speed, and the ore blocks fall into the crushing space 3. The rack 102 and the tooth groove 202 cut the stones into small pieces. Driven by the multi-dimensional spiral groove 201, the small particles move at high speed in different directions, forming mutual collision or friction between the particles, that is, the collision and friction between the particles and the stator 1 and the rotor 2, so that the particles are quickly turned into fine powder. Under the action of centrifugal force, the fine powder flies out of the crushing space 3 from the gaps 103 between the screen bars to complete the crushing of the ore.

[0030] The above multi-dimensional rotary tooth pulverizer adopts a processing method of simultaneous pulverization and high-speed centrifugal screening. The particles that meet the particle size requirements are quickly separated from the machine body, so that the over-grinding of the mineral powder will not occur, reducing the useless energy consumed by over-grinding. Studies have shown that the average particle size of the pulverized particles is reduced from 40μm by 20μm, and the energy consumption is increased by 200%. In order to ensure the full pulverization of the ore, the proportion of large particles in the ball mill is generally controlled, and the particles larger than 75μm are generally controlled to be ≤10%; for the mill, when this standard is reached, the particles smaller than 38μm in the mineral powder reach 30%, while the use of a multi-dimensional rotary tooth pulverizer, to achieve the same particle size control, the mineral powder smaller than 38μm only accounts for 5%.

[0031] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-dimensional rotary tooth crushing device, characterized in that: It comprises a stator (1) and a rotor (2) matching the stator (1); The stator (1) comprises a screen bar group and a rack (102) which are spaced apart and distributed on the inner side wall of the stator (1); the screen bar group is composed of a plurality of screen bars (101) which are equally spaced apart, and screen bar gaps (103) are left between adjacent screen bars (101); The rotor (2) comprises a multidimensional spiral groove (201) which is arranged at equal intervals on the rotor (2); a plurality of tooth grooves (202) which match the rack (102) are arranged on the outer wall of the multidimensional spiral groove (201); a rotating shaft (203) is fixedly arranged at the center position of the rotor (2); and the rotating shaft (203) is connected to a driving device.

2. The multi-dimensional rotary tooth pulverizing device according to claim 1, characterized in that: The size of the sieve bar gap (103) is 0.5-5 mm.

3. The multi-dimensional rotary tooth pulverizing device according to claim 1, characterized in that: The multi-dimensional spiral groove (201) is a nonlinear curved surface.

4. The multi-dimensional rotary tooth pulverizing device according to claim 1, characterized in that: A gap is reserved at the meshing position of the rack (102) and the tooth groove (202).

5. The multi-dimensional rotary tooth pulverizing device according to claim 1, characterized in that: A crushing space (3) is formed between the stator (1) and the multi-dimensional spiral groove (201).

6. The multi-dimensional rotary tooth pulverizing device according to claim 1, characterized in that: The number of the screen bars (101) is at least three.

7. The multi-dimensional rotary tooth pulverizing device according to claim 1, characterized in that: The number of the multi-dimensional spiral grooves (201) is 2-4.

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