Wet-process ultrafine grinding equipment

Abstract

The wet-process ultrafine grinding equipment comprises a vertically-arranged grinding cylinder and an annular wear-resistant fixed disc fixed to the middle of the grinding cylinder, a grinding rod is arranged in the center of the wear-resistant fixed disc in a penetrating mode, the grinding rod is sleeved with a double-cone grinding disc and a plurality of disturbance blades, and one end of the grinding rod is connected with a driving mechanism; the double-cone millstone is located above the wear-resistant fixed disc, and a gap A between the edge of the double-cone millstone and the inner wall of the grinding cylinder is larger than a gap B between the edge of the double-cone millstone and the wear-resistant fixed disc; and the wet-process ultrafine grinding equipment further comprises a plurality of grinding beads which are filled in the grinding cylinder and are positioned below the double-cone grinding disc. The driving mechanism drives the vertically arranged double-cone grinding disc and the disturbance blades to rotate along with the double-cone grinding disc, strong grinding, extruding, impacting and shearing effects are generated, wet-process superfine grinding is achieved, meanwhile, the concentricity and stability of equipment are ensured, energy loss is reduced, and the grinding effect and the production efficiency are improved.

Description

Technical Field

[0001] The invention mainly relates to the technical field of crushing and grinding, and in particular to a wet method ultrafine crushing and grinding equipment. Background Art

[0002] In the fields of powder materials, smelting and mineral processing, in order to obtain small-sized materials, large-sized materials need to be crushed and ground.

[0003] In the existing technology, crushing and grinding usually adopt the process of dry crushing + wet grinding to refine the particle size of mineral raw materials. This processing method usually first uses a crusher (such as a cone crusher or a high-pressure roller mill) to crush the large pieces of ore to a specified particle size, and then transfers the crushed material to a ball mill or other grinding equipment for grinding until the particle size requirements are met (processing flow such as Figure 1 as shown).

[0004] When the above process is used for refinement, in the dry crushing stage, the crusher has very strict requirements on the moisture content of the material. When the moisture content exceeds 8%, it will be difficult to discharge the material, thus affecting the operating efficiency; in the wet grinding stage, the moisture content of the material is strictly required to be between 25-35%. Since there are significant differences in the requirements for the moisture content of the material in the dry crushing stage and the wet grinding stage, water distribution must be carried out during the conversion process between the two stages, that is, the intermediate product obtained in the dry crushing stage is adjusted to meet the moisture content required by the wet grinding stage. Because the two stages must be processed by different equipment, transportation between equipment is also required during the conversion process. This transportation process is likely to affect the moisture content of the intermediate product obtained in the dry crushing stage, thereby reducing the quality of the product. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a wet method ultrafine grinding device.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A wet method ultrafine grinding equipment comprises a vertically arranged grinding cylinder and an annular wear-resistant fixed plate fixed in the middle thereof, a grinding rod is penetrated in the center of the wear-resistant fixed plate, a double-cone grinding disc and a plurality of impeller blades are respectively mounted on the grinding rod, and one end of the grinding rod is connected to a driving mechanism; the double-cone grinding disc is located above the wear-resistant fixed plate, and a gap A between the edge of the double-cone grinding disc and the inner wall of the grinding cylinder is greater than a gap B between the edge of the double-cone grinding disc and the wear-resistant fixed plate; the wet method ultrafine grinding equipment also comprises a plurality of grinding beads filled in the grinding cylinder and located below the double-cone grinding disc.

[0007] The driving mechanism drives the vertically arranged double cone grinding disc and the disturbance blade to rotate, generating strong grinding, extrusion, impact and shearing effects to achieve wet ultrafine grinding. The gap A between the edge of the double cone grinding disc and the inner wall of the crushing and grinding cylinder is larger than the gap B between the edge of the double cone grinding disc and the wear-resistant fixed disc, so that the material can be graded and ground multiple times during the rotation process (firstly ground by the edge of the double cone grinding disc and the inner wall of the crushing and grinding cylinder, and then finely ground by the double cone grinding disc and the wear-resistant fixed disc). The ground material falls to the middle and lower part of the inner cylinder of the crushing and grinding cylinder, and the disturbance blade drives the grinding beads from top to bottom to perform forced multi-dimensional grinding and refinement, so as to achieve ultrafine grinding of the material. The grinding effect is improved by graded and multiple grinding, and the disturbance blade enhances the fluidity and mixing uniformity of the material. The grinding beads located below the double cone grinding disc further enhance the grinding effect. In addition, the double-cone grinding disc and several interfering impellers are mounted on the same grinding rod, which ensures the concentricity and stability of the equipment, directly transmits power, reduces energy loss, reduces vibration, simplifies structural design, and improves overall operating efficiency and equipment durability, thereby improving grinding effects and production efficiency.

[0008] In the above wet ultrafine grinding equipment, preferably, the upper section of the crushing and grinding cylinder is provided with a feeding port for material input, and the output end of the feeding port is located on the upper side of the double-cone grinding disc. The feeding port is arranged on the upper section of the crushing and grinding cylinder, and the output end is located on the upper side of the double-cone grinding disc, so that the material added through the feeding port can directly enter the grinding area for grinding, optimize the flow path of the material, improve the grinding efficiency, and reduce energy consumption and material loss.

[0009] In the wet ultrafine grinding equipment, preferably, the bottom of the grinding cylinder is provided with a discharge port for discharging the material. The design of the bottom discharge port allows the ground material to be discharged directly, reducing the time the material stays in the cylinder and improving the efficiency of the entire grinding process.

[0010] In the wet ultrafine grinding equipment, preferably, the upper surface of the wear-resistant fixed plate is inclined inward and has a conical surface. The conical surface of the wear-resistant fixed plate optimizes the material flow path, enhances the grinding efficiency and uniformity, disperses the grinding force, reduces local wear, and improves the overall grinding performance.

[0011] In the above wet ultrafine grinding equipment, preferably, the grinding rod is coaxially installed with the grinding cylinder. The grinding rod and the grinding cylinder are coaxially installed to ensure the concentricity and stability of the equipment, directly transmit power, reduce energy loss, reduce vibration, simplify structural design, and improve overall operating efficiency and equipment durability, thereby improving grinding effect and production efficiency.

[0012] In the above wet ultrafine grinding equipment, preferably, the gap A between the edge of the double-cone grinding disc and the inner wall of the crushing and grinding cylinder is 5-20 mm. The appropriate gap can make the material preliminarily ground between the double-cone grinding disc and the inner wall of the crushing and grinding cylinder, making the material particle size distribution more uniform, and at the same time can ensure that the material flows effectively between the double-cone grinding disc and the inner wall of the crushing and grinding cylinder, reduce the accumulation of materials on the double-cone grinding disc, and improve the grinding efficiency.

[0013] In the wet ultrafine grinding equipment, preferably, the lower surface of the double-cone grinding disc is not parallel to the upper surface of the wear-resistant fixed disc, and the gap between the two gradually decreases from the outside to the inside. The gradual reduction of the gap can adapt to materials of different particle sizes, so that larger particles are initially ground on the outside to form smaller particles, and the smaller particles are further ground and refined on the inside, which can effectively improve the grinding effect of the double-cone grinding disc and improve the fineness of grinding.

[0014] In the wet ultrafine grinding equipment, preferably, the outer gap B1 between the lower surface of the double-cone grinding disc and the upper surface of the wear-resistant fixed disc is 5-10 mm, and the inner gap B2 is 0.5-3 mm. The larger outer gap B1 facilitates the entry and flow of materials, while the smaller inner gap B2 enhances the concentration of materials in the center of the grinding disc and the grinding fineness, thereby improving the grinding efficiency and the fineness of the product.

[0015] In the wet ultrafine grinding equipment, preferably, the driving mechanism is located outside the grinding cylinder. Designing the driving mechanism outside the grinding cylinder facilitates maintenance and reduces failures, while avoiding direct contamination of the driving mechanism by grinding media and materials, thereby improving the safety and operational stability of the equipment.

[0016] In the wet ultrafine grinding equipment, preferably, the driving mechanism can drive the grinding rod to rotate bidirectionally. The bidirectional rotation helps to break up the materials deposited at the bottom, improve the dispersion effect of the materials, effectively prevent the agglomeration and reverse crushing of the materials, and crush the particles into finer particles to obtain a product with good dispersion.

[0017] Compared with the prior art, the advantages of the present invention are: The wet superfine grinding equipment of the present invention drives the vertically arranged double cone grinding disc and the disturbance blade to rotate by a driving mechanism, thereby generating strong grinding, extrusion, impact and shearing effects to achieve wet superfine grinding. The gap A between the edge of the double cone grinding disc and the inner wall of the crushing and grinding cylinder is larger than the gap B between the edge of the double cone grinding disc and the wear-resistant fixed disc, so that the material can be graded and ground multiple times during the rotation process (firstly ground by the edge of the double cone grinding disc and the inner wall of the crushing and grinding cylinder, and then finely ground by the double cone grinding disc and the wear-resistant fixed disc). The ground material falls to the middle and lower part of the inner cylinder of the crushing and grinding cylinder, and the disturbance blade drives the grinding beads from top to bottom to perform forced multi-dimensional grinding and refinement, thereby achieving superfine grinding of the material. The grinding effect is improved by graded and multiple grinding, and the disturbance blade enhances the fluidity and mixing uniformity of the material. The grinding beads located below the double cone grinding disc further enhance the grinding effect. In addition, the double-cone grinding disc and several interfering impellers are mounted on the same grinding rod, which ensures the concentricity and stability of the equipment, directly transmits power, reduces energy loss, reduces vibration, simplifies structural design, and improves overall operating efficiency and equipment durability, thereby improving grinding effects and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the dry crushing + wet grinding process in the prior art; Figure 2 It is a structural schematic diagram of wet ultrafine grinding equipment; Figure 3 yes Figure 2 A partial enlarged schematic diagram of the middle Q.

[0019] The numbers in the figure represent: 1. grinding cylinder; 11. feeding port; 12. discharging port; 2. wear-resistant fixed plate; 3. grinding rod; 4. double-cone grinding disc; 5. disturbance blade; 6. driving mechanism; 7. grinding beads. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example like Figure 2 and Figure 3 As shown, the wet superfine grinding equipment of this embodiment includes a vertically arranged grinding cylinder 1 and an annular wear-resistant fixed plate 2 fixed in the middle thereof, a grinding rod 3 is penetrated by the center of the wear-resistant fixed plate 2, and a double-cone grinding disc 4 and some interfering impeller blades 5 are respectively mounted on the grinding rod 3, and one end of the grinding rod 3 is connected to a driving mechanism 6; the double-cone grinding disc 4 is located above the wear-resistant fixed plate 2, and a gap A between the edge of the double-cone grinding disc 4 and the inner wall of the grinding cylinder 1 is greater than a gap B between the edge of the double-cone grinding disc 4 and the wear-resistant fixed plate 2; the wet superfine grinding equipment also includes a plurality of grinding beads 7 filled in the grinding cylinder 1 and located below the double-cone grinding disc 4.

[0022] In this embodiment, a feeding port 11 for inputting materials is provided at the upper section of the crushing and grinding cylinder 1 , and an output end of the feeding port 11 is located on the upper side of the double-cone grinding disc 4 .

[0023] In this embodiment, a discharge port 12 for discharging materials is provided at the bottom of the grinding cylinder 1.

[0024] In this embodiment, the upper surface of the wear-resistant fixed plate 2 is inclined inward and has a conical shape.

[0025] In this embodiment, the grinding rod 3 and the grinding cylinder 1 are coaxially installed.

[0026] In this embodiment, the gap A between the edge of the double-cone grinding disc 4 and the inner wall of the grinding cylinder 1 is 5-20 mm.

[0027] In this embodiment, the lower surface of the double-cone grinding disc 4 is not parallel to the upper surface of the wear-resistant fixed disc 2, and the gap between the two gradually decreases from the outside to the inside.

[0028] In this embodiment, the outer clearance B1 between the lower surface of the double-cone grinding disc 4 and the upper surface of the wear-resistant fixed disc 2 is 5-10 mm, and the inner clearance B2 is 0.5-3 mm.

[0029] In this embodiment, the driving mechanism 6 is located outside the grinding cylinder 1 .

[0030] In this embodiment, the driving mechanism 6 can drive the grinding rod 3 to rotate in both directions.

[0031] In this embodiment, the specific grinding process is as follows: the particulate material enters the crushing and grinding cylinder 1 from the feeding port 11 at the upper section of the crushing and grinding cylinder 1, and the material first falls on the double-cone grinding disc 4. The double-cone grinding disc 4 rotates to make the material centrifugally move to the edge of the inner wall of the crushing and grinding cylinder 1 for preliminary crushing. The preliminarily refined material enters the gap between the wear-resistant fixed disc and the double-cone grinding disc 4 through the action of water flow for further grinding. The ground material falls to the middle and lower part of the inner cylinder of the crushing and grinding cylinder 1, and the grinding beads 7 are driven by the disturbance blades 5 from top to bottom for forced multi-dimensional grinding and refinement, thereby realizing ultra-fine grinding of the material, and finally discharged from the discharge port 12.

[0032] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A wet ultrafine grinding device, characterized in that: The invention comprises a vertically arranged grinding cylinder (1) and an annular wear-resistant fixed disk (2) fixed in the middle thereof, a grinding rod (3) is provided in the center of the wear-resistant fixed disk (2), a double-cone grinding disk (4) and a plurality of interfering impeller blades (5) are respectively mounted on the grinding rod (3), and one end of the grinding rod (3) is connected to a driving mechanism (6); the double-cone grinding disk (4) is located above the wear-resistant fixed disk (2), and a gap A between the edge of the double-cone grinding disk (4) and the inner wall of the grinding cylinder (1) is larger than a gap B between the edge of the double-cone grinding disk (4) and the wear-resistant fixed disk (2); the wet superfine grinding equipment further comprises a plurality of grinding beads (7) filled in the grinding cylinder (1) and located below the double-cone grinding disk (4).

2. The wet superfine grinding equipment according to claim 1, characterized in that: The upper section of the crushing and grinding cylinder (1) is provided with a feeding port (11) for inputting materials, and the output end of the feeding port (11) is located on the upper side of the double-cone grinding disc (4).

3. The wet superfine grinding equipment according to claim 1, characterized in that: The bottom of the crushing and grinding cylinder (1) is provided with a discharge port (12) for discharging materials.

4. The wet superfine grinding equipment according to claim 1, characterized in that: The upper surface of the wear-resistant fixed plate (2) is inclined inwardly and is in the shape of a cone.

5. The wet superfine grinding equipment according to claim 1, characterized in that: The grinding rod (3) is coaxially mounted with the grinding cylinder (1).

6. The wet superfine grinding equipment according to claim 5, characterized in that: The gap A between the edge of the double-cone grinding disc (4) and the inner wall of the grinding cylinder (1) is 5-20 mm.

7. The wet superfine grinding equipment according to claim 1, characterized in that: The lower surface of the double-cone grinding disc (4) is not parallel to the upper surface of the wear-resistant fixed disc (2), and the gap between the two gradually decreases from the outside to the inside.

8. The wet superfine grinding equipment according to claim 7, characterized in that: The outer clearance B1 between the lower surface of the double-cone grinding disc (4) and the upper surface of the wear-resistant fixed disc (2) is 5-10 mm, and the inner clearance B2 is 0.5-3 mm.

9. The wet superfine grinding equipment according to claim 1, characterized in that: The driving mechanism (6) is located outside the grinding cylinder (1).

10. The wet superfine grinding equipment according to claim 1, characterized in that: The driving mechanism (6) can drive the grinding rod (3) to rotate in both directions.

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