Closed-circuit ore grinding device based on moxa sand mill
By using a closed-circuit grinding system combining a sand mill and a cyclone in the Asher Mine, the problem of grinding fineness is solved, and efficient grinding fineness improvement and energy saving is achieved.
Patent Information
- Application Number
- CN202420641311.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-30
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-03-30
AI Technical Summary
Asher Mine requires high grinding fineness, while the grinding medium size of the mercury sand mill is at least 2mm. If the medium is too small, the grinding fineness will not meet the requirements.
A closed-circuit grinding system is used to combine a sand mill and a cyclone. After the ore is initially concentrated by a dense machine, it enters a sand mill for initial grinding. The materials after the grinding enter the cyclone for graded. The materials with excessive particle size are returned to the sand mill for re-grinding, forming a closed-circuit cycle until the required grinding fineness is achieved.
Through the closed-circuit grinding system, the fineness of grinding products is improved, energy and grinding medium losses are saved, and the problem of media size limitation of hydrazine mills is solved.
Smart Images
Figure CN222842287U_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of mineral processing, and specifically relates to a closed-circuit grinding device based on an argon sand mill. Background Art
[0002] The Ai sand mill is mainly used for regrinding and ultrafine grinding in ferrous metal, non-ferrous metal and non-metallic mines to improve the concentrate grade and recovery rate. The working principle of the Ai sand mill is composed of a grinding cylinder filled with grinding media and a rotating agitator. The rotating agitator is equipped with 8 stirring discs and a product separator. 8 independent grinding chambers are formed between the stirring discs. The stirring shaft rotates at high speed to stir the grinding media, generating impact, shearing and friction to achieve ultrafine grinding of the material.
[0003] However, the Ashele Mine required a very high grinding fineness, and the minimum grinding medium size of the Ai sand mill is 2mm. If the medium is too small, the grinding fineness will not meet the requirements. Therefore, Ashele invented the new process of "Ai sand mill and cyclone closed circuit grinding" to improve the grinding fineness, and increase the final discharge fineness from the original -10μm accounting for 45% to 52%, further solving the resource recovery problem of arsenic tetrahedrite. Utility Model Content
[0004] The purpose of this scheme is to provide a closed-circuit grinding device based on the Ai sand mill to solve the high requirements of the Ashele mine on the grinding fineness.
[0005] In order to achieve the above-mentioned purpose, the present invention provides a closed-circuit grinding device based on an wormwood sand mill, comprising an wormwood sand mill, and further comprising:
[0006] A pump pool, wherein the pump pool is arranged at the front end of the sand mill, and the feed end of the sand mill is connected to the pump pool via a slurry pump;
[0007] A thickener, the thickener is arranged at the front end of a pump tank, and the discharge end of the thickener is connected to the pump tank via a slurry pump;
[0008] A regrinding pump pool, which is arranged at the rear end of the wormwood sand mill and is connected to the discharge end of the wormwood sand mill through a pipeline;
[0009] The cyclone is arranged at the rear end of the regrinding pump pool, and the feed end of the cyclone is connected to the regrinding pump pool through a slurry pump.
[0010] The principle of this scheme is: by adopting a closed-circuit grinding system combining an Ai sand mill and a cyclone, the ore is initially concentrated by a thickener, then pumped to a pump tank by a slurry pump, and then enters the Ai sand mill for primary grinding. The Ai sand mill uses the high-speed rotation of the stirring disc inside to impact, shear and rub the ore with the grinding medium to achieve coarse grinding. The ground material flows out of the Ai sand mill into the regrinding pump tank, and then is pumped to the cyclone for classification by a slurry pump. The cyclone separates the material according to the particle size and density. The material with too coarse particle size will be separated and returned to the Ai sand mill for regrinding, forming a closed-circuit cycle until the required grinding fineness is achieved.
[0011] The technical effects of this solution are as follows: (1) The stirring disc design inside the sand mill allows the ore to be subjected to strong impact, shear and friction under high-speed rotation, achieving efficient coarse grinding. The cyclone accurately classifies the particles according to their size and density, ensuring that unqualified coarse particles are returned to the sand mill for re-grinding. Through repeated cycles, the fineness of the ground product is gradually improved. (2) Compared with a one-time open-circuit grinding system, a closed-circuit grinding system can avoid grinding all the ores to a very fine degree at one time, thereby saving a lot of energy and grinding medium loss.
[0012] Furthermore, the sand settling port of the cyclone is connected to a pump pool via a slurry pump.
[0013] The technical effect of this solution is that unqualified coarse particle materials can be returned to a pump pool and then sent to the sand mill for re-grinding.
[0014] Furthermore, the cyclone is provided with a booster assembly, and the booster assembly is used to increase the discharge pressure of the cyclone discharge valve.
[0015] The technical effect of this solution is that when the discharge valve of the cyclone is opened, a large amount of sand and gravel will be deposited at the connection end between the discharge valve and the cyclone, resulting in the sand often blocking the discharge valve when the valve is opened, or causing the discharge amount to decrease. Therefore, a booster component is provided to increase the pressure of the water flow, thereby flushing the sand out of the discharge valve.
[0016] Furthermore, the boosting assembly includes a water storage chamber and a permanent magnet disposed in the water storage chamber, the permanent magnet is connected to a spring, the free end of the spring is fixedly connected to the inner wall of the water storage chamber, an electromagnet cooperating with the permanent magnet is disposed on the outside of the water storage chamber, and the water storage chamber is connected to a discharge valve.
[0017] The technical effect of this solution is that in the initial state, the electromagnet is energized to attract the permanent magnet and stretch the spring. When the electromagnet is powered off, the permanent magnet loses the attraction of the electromagnet and resets under the drive of the spring, thereby squeezing the water in the water storage chamber, and the water is squeezed into the discharge valve, thereby increasing the pressure of the water flow and flushing out the sediment in the discharge valve.
[0018] Furthermore, the water storage chamber is connected to the cyclone through a water inlet pipe, and a filter is provided at the connecting end of the water inlet pipe and the cyclone.
[0019] The technical effect of this solution is that when the cyclone is used for mineral processing, there is water flow in the cyclone. The water inlet pipe is connected to the cyclone, so that a small part of the water in the cyclone flows into the water storage chamber. At the same time, a filter screen is set to prevent sand and gravel from entering the water storage chamber.
[0020] Furthermore, a one-way valve is provided on the water inlet pipe.
[0021] The technical effect of this solution is to make the water flow into the water storage chamber according to a preset direction.
[0022] Furthermore, a slide groove is provided in the water storage chamber, and the permanent magnet is slidably connected to the slide groove.
[0023] The technical effect of this solution is that the slide groove provides positioning and guiding functions for the movement of the permanent magnet.
[0024] Furthermore, a protrusion is provided on the handle of the discharge valve, and a push switch matching the protrusion is provided on the discharge valve. When the protrusion contacts the push switch, the electromagnet is powered off.
[0025] The technical effect of this solution is that when the discharge valve needs to be opened, the handle of the discharge valve is turned, and the protrusion on the handle rotates in the same direction as the handle. When the protrusion contacts the push switch, the electromagnet is de-energized, so that the permanent magnet squeezes the water in the water storage chamber to increase the water flow pressure of the discharge valve, thereby cleaning the sediment.
[0026] Furthermore, the water storage chamber is connected to the discharge valve via a Tesla valve.
[0027] The technical effect of this solution is that the Tesla valve can further increase the water flow pressure from the water storage chamber into the discharge valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 This is a schematic diagram of the structure of a closed-circuit grinding device based on an argon sand mill according to the utility model;
[0029] Figure 2 This is a rear view of the cyclone of the utility model;
[0030] Figure 3 It is a cross-sectional view of the booster assembly of the utility model.
[0031] The names of the corresponding marks in the accompanying drawings are: Ai sand mill 1, first-stage pump tank 2, slurry pump 3, thickener 4, regrinding pump tank 5, cyclone 6, discharge valve 61, booster assembly 7, water storage chamber 71, permanent magnet 72, spring 73, electromagnet 74, water inlet pipe 75, one-way valve 76, bump 77, push switch 78, Tesla valve 79. DETAILED DESCRIPTION
[0032] The following will clearly and completely describe the concept and technical effects of the utility model in combination with the embodiments, so as to fully understand the purpose, features and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model:
[0033] Example:
[0034] See also Figure 1 , a closed-circuit grinding device based on an abrasive mill, including a thickener 4, a slurry pump 3, a first-stage pump pool 2, a slurry pump 3, an abrasive mill 1, a regrinding pump pool 5 and a cyclone 6, which are arranged from left to right in sequence. The sand settling port of the cyclone 6 is connected to the first-stage pump pool 2 through the slurry pump 3. By adopting a closed-circuit grinding system combining an abrasive mill 1 and a cyclone 6, the ore is initially concentrated by the thickener 4, and then sent to the first-stage pump pool 2 through the slurry pump 3, and then enters the abrasive mill 1 for primary grinding. The abrasive mill 1 uses the high-speed rotation of the stirring disc to impact, shear and rub the ore with the grinding medium to achieve coarse grinding. The ground material flows out of the abrasive mill 1 and enters the regrinding pump pool 5, and then is sent to the cyclone 6 through the slurry pump 3 for classification. The cyclone 6 separates the materials according to their particle size and density. The materials with too coarse particles will be separated and returned to the sand mill 1 for regrinding, forming a closed loop until the required grinding fineness is achieved.
[0035] See also Figure 2 and Figure 3 The hydrocyclone 6 is provided with a booster assembly 7, which is used to increase the discharge pressure of the hydrocyclone discharge valve 61, such as the pressure of the water flow. When the discharge valve 61 of the hydrocyclone 6 is opened, a large amount of sand and gravel will be deposited at the connection end between the discharge valve 61 and the hydrocyclone 6, resulting in the sedimentation of sand often blocking the discharge valve 61 when the valve is opened, or causing the discharge amount of the discharge valve 61 to be reduced. Therefore, by providing the booster assembly 7, the water flow pressure of the discharge is increased, so that the sedimentation of sand is flushed out of the discharge valve 61.
[0036] The booster assembly 7 includes a water storage chamber 71 and a permanent magnet 72 disposed in the water storage chamber 71. A slide groove is disposed in the water storage chamber 71. The permanent magnet 72 is slidably connected to the slide groove. The slide groove provides positioning and guiding functions for the movement of the permanent magnet 72. One end surface of the permanent magnet 72 is symmetrically connected to two springs 73. The free ends of the two springs 73 are fixedly connected to the inner wall of the water storage chamber 71. An electromagnet 74 that cooperates with the permanent magnet 72 is disposed on the outer side of the water storage chamber 71. When the electromagnet 74 is energized, It is used to attract the permanent magnet 72. The water storage chamber 71 is connected to the cyclone 6 through the water inlet pipe 75. The connection end of the water inlet pipe 75 and the cyclone 6 is provided with a filter. The water storage chamber 71 is connected to the discharge valve 61 through the Tesla valve 79. The Tesla valve 79 can further increase the water flow pressure from the water storage chamber 71 into the discharge valve 61. When the cyclone 6 is beneficiating, it has its own water flow, which is connected to the cyclone 6 through the water inlet pipe 75, so that a small part of the water in the cyclone 6 flows into the water storage chamber 71. At the same time, a filter is set to prevent sand and gravel from entering the water storage chamber 71. A one-way valve 76 is provided on the water inlet pipe 75, so that the water flows into the water storage chamber 71 in a preset direction; in the initial state, the electromagnet 74 is energized to attract the permanent magnet 72 and stretch the spring 73. When the electromagnet 74 is powered off, the permanent magnet 72 loses the attraction of the electromagnet 74 and is reset under the drive of the spring 73, thereby squeezing the water in the water storage chamber 71. The water is squeezed into the discharge valve 61, thereby increasing the pressure of the water flow and flushing out the sediment in the discharge valve 61.
[0037] The handle of the discharge valve 61 is provided with a protrusion 77, and the discharge valve 61 is provided with a push switch 78 that matches the protrusion 77. When the protrusion 77 contacts the push switch 78, the electromagnet 74 is powered off. When the discharge valve 61 needs to be opened, the handle of the discharge valve 61 is rotated, and the protrusion 77 on the handle rotates in the same direction as the handle. When the protrusion 77 contacts the push switch 78, the electromagnet 74 is powered off, so that the permanent magnet 72 squeezes the water in the water storage chamber 71 to increase the water flow pressure of the discharge valve 61, thereby cleaning the sediment.
[0038] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A closed-circuit grinding device based on an argon sand mill, comprising an argon sand mill (1), characterized in that: Also includes: A pump tank (2), wherein the pump tank (2) is arranged at the front end of the sand mill (1), and the feed end of the sand mill (1) is connected to the pump tank (2) via a slurry pump (3); A thickener (4), the thickener (4) being arranged at the front end of a first-stage pump tank (2), and the discharge end of the thickener (4) being connected to the first-stage pump tank (2) via a slurry pump (3); A regrinding pump pool (5), the regrinding pump pool (5) being arranged at the rear end of the wormwood sand mill (1), the regrinding pump pool (5) being connected to the discharge end of the wormwood sand mill (1) via a pipeline; A cyclone (6), wherein the cyclone (6) is arranged at the rear end of the regrinding pump pool (5), and the feed end of the cyclone (6) is connected to the regrinding pump pool (5) via a slurry pump (3).
2. A closed-circuit grinding device based on an argon sand mill according to claim 1, characterized in that: The sand settling port of the cyclone (6) is connected to a pump pool (2) via a slurry pump (3).
3. A closed-circuit grinding device based on wormwood mill according to claim 1, characterized in that: The cyclone (6) is provided with a pressure-boosting assembly (7), and the pressure-boosting assembly (7) is used to increase the discharge pressure of the cyclone discharge valve (61).
4. A closed-circuit grinding device based on an argon sand mill according to claim 3, characterized in that: The booster assembly (7) comprises a water storage chamber (71) and a permanent magnet (72) disposed in the water storage chamber (71); the permanent magnet (72) is connected to a spring (73); the free end of the spring (73) is fixedly connected to the inner wall of the water storage chamber (71); an electromagnet (74) matching the permanent magnet (72) is disposed on the outer side of the water storage chamber (71); and the water storage chamber (71) is connected to a discharge valve (61).
5. A closed-circuit grinding device based on wormwood mill according to claim 4, characterized in that: The water storage chamber (71) is in communication with the cyclone (6) via a water inlet pipe (75), and a filter screen is provided at the connection end between the water inlet pipe (75) and the cyclone (6).
6. A closed-circuit grinding device based on wormwood mill according to claim 5, characterized in that: The water inlet pipe (75) is provided with a one-way valve (76).
7. A closed-circuit grinding device based on wormwood mill according to claim 6, characterized in that: A slide groove is provided in the water storage chamber (71), and the permanent magnet (72) is slidably connected to the slide groove.
8. A closed-circuit grinding device based on wormwood mill according to claim 7, characterized in that: The handle of the discharge valve (61) is provided with a protrusion (77), and the discharge valve (61) is provided with a push switch (78) that matches the protrusion (77). When the protrusion (77) contacts the push switch (78), the electromagnet (74) is de-energized.
9. A closed-circuit grinding device based on an argon sand mill according to claim 8, characterized in that: The water storage chamber (71) is in communication with the discharge valve (61) via a Tesla valve (79).