An ultrasonic ball mill

A crusher and ultrasonic technology, applied in grain processing and other directions, can solve the problems of unable to form high-density energy field, unable to achieve nano-refinement effect, fast attenuation of ultrasonic energy, etc., to eliminate local uneven concentration, easy to disassemble and repair Or replace, prevent the effect of particle agglomeration

Inactive Publication Date: 2011-12-21
CHANGSHA SDLUBE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can partially pulverize micron-sized MgO and metal copper powders to nano-sized, this structure has a large loss of ultrasonic energy and low transmission efficiency; The outside, similar to the structure of the ultrasonic cleaning cup, acts on the material through the barrel wall. The ultrasonic energy attenuates quickly, and most of the energy is absorbed by the barrel wall, which cannot form a high-density energy field in the material medium.
Especially for solid lubricating materials such as tungsten disulfide, molybdenum disulfide and graphite with a lamellar structure, the nano-refinement effect cannot be achieved.

Method used

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  • An ultrasonic ball mill
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Refer to figure 1 :

[0023] In this embodiment, the mixing barrel 1 for holding materials has an inner diameter of 500mm and an outer diameter of 560mm. There is a cooling water jacket 2 between the inner and outer barrels. The bottom of the barrel has a discharge port 7 and a volleyball hole 8.

[0024] The transmission motor 3 is fixed on the frame 10. The motor 3 drives the mixing shaft 6 and blades 7 in the mixing barrel to rotate through the pulley 4 and the linkage shaft 5. The material of the mixing shaft in this embodiment is martensitic stainless steel; there are four mixing blades. The layer is screwed and welded, and the height of the mixing blade is 45mm. The mixing blade pushes several grinding balls placed in the mixing barrel to crush and grind the materials; the material of the grinding balls is zirconia, with an average particle size of 2mm.

[0025] A total of 8 sets of ultrasonic horns of the ultrasonic generator 9 are installed on the openings and mountin...

Embodiment 2

[0030] Refer to image 3 with Figure 4 :

[0031] In this embodiment, the material enters the mixing barrel from the feed port 18; the four ultrasonic generators 9 are installed on the hole of the barrel wall of the mixing barrel 1 and the installation boss 17 through the flange inclined 45 degrees, and the ultrasonic wave is inclined to the material at 45 degrees. Energy field effect. In this embodiment, after 12 hours of continuous work, 2 kg of tungsten disulfide or molybdenum disulfide powder with an average particle size of 4-5 μm can be crushed to an average particle size of about 0.6 μm, and the proportion of the particle size below 100 nm reaches about 20%.

Embodiment 3

[0033] Refer to Figure 5 :

[0034] The difference between this embodiment and embodiment 1 is that 4 ultrasonic horns are installed vertically on the lid of the mixing drum, the tool head is 50mm from the bottom of the barrel, and the 4 ultrasonic horns are installed on the wall of the drum at an angle of 45°. The ultrasonic energy fields of the straight and inclined ultrasonic generators have a cross-converging effect on the materials. In this embodiment, after 12 hours of continuous work, 2 kg of tungsten disulfide or molybdenum disulfide powder with an average particle size of 4-5 μm can be crushed to an average particle size of about 0.3 μm, and the proportion of the particle size below 100 nm reaches about 40%.

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Abstract

The invention provides an ultrasonic ball mill pulverizer which comprises a frame, a mixing tank, a transmission motor driving a stirring shaft to rotate, the stirring shaft pushing mill balls to crush and grind a material, a material circulation system, as well as a cooling water jacket layer, a water inlet, a water outlet, a material inlet, a material outlet and a ball discharge port which are arranged on the mixing tank. The ultrasonic ball mill pulverizer is characterized in that: holes for inserting ultrasonic generators and an assembly bosses are formed on the upper cover or / and wall of the mixing tank; 1 to 12 sets of ultrasonic generators are vertically or / and obliquely inserted into the assembly bosses which are connected or welded on the cover or the wall of the mixing tank through threads or flanges; and probes of the ultrasonic generators are inserted deep into the mixing tank and contacted with the material, so that the material completely absorb strong ultrasonic energy. While performing stirring and ball milling to the material, the ultrasonic ball mill pulverizer applies strong ultrasonic field action to generate a high-density energy filed, so that micron-grade or sub-micron-grade (0.7-30mu m) powder can be crushed into nano-grade (20-600nm) powder. The ultrasonic ball mill pulverizer has the advantages of high yield and efficiency, simple process, is easy to operate and control and can eliminate local concentration unevenness, effectively prevent particle agglomeration, and is suitable for industrial production.

Description

Technical field [0001] The invention relates to the field of powder preparation and processing machinery, in particular to an ultrasonic ball mill crusher. Background technique [0002] The preparation of nanomaterials is the most important basic technology in nanotechnology research. At present, most of the preparation of nanomaterials uses gas phase and liquid phase methods. These methods have disadvantages such as complex processes, fine operations, high costs, or difficulty in preparing precursors. , Only a small amount of samples can be prepared in the laboratory, and it is difficult to realize industrial production. In recent years, with the increasing development and maturity of ultrasonic technology, it has been widely used in the fields of synthesis of new materials, chemical reactions, and enhancement of transfer processes. Ultrasound is not only a form of wave, but also a form of energy. It interacts with the medium in the propagation process to produce cavitation and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/14B02C17/16
Inventor 毛大恒石琛毛向辉陈鋮彬毛艳李登伶
Owner CHANGSHA SDLUBE SCI & TECH
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