Ultrasonic ball mill pulverizer

A crusher, ultrasonic technology, applied in the direction of grain processing, etc., can solve the problems of not being able to form a high-density energy field, fail to achieve nano-refining effect, fast decay of ultrasonic energy, etc., to eliminate local uneven concentration, easy to disassemble and repair Or replacement, the effect of preventing particle agglomeration

Inactive Publication Date: 2014-05-07
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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  • Ultrasonic ball mill pulverizer
  • Ultrasonic ball mill pulverizer
  • Ultrasonic ball mill pulverizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] refer to figure 1 :

[0023] In this embodiment, the inner diameter of the mixing tank 1 used for holding materials is 500 mm, and the outer diameter is 560 mm. There is a cooling water jacket layer 2 between the inner and outer tanks, and a discharge port 7 and a volleyball hole 8 are arranged at the bottom of the tank.

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

[0025] A total of 8 sets of ultrasonic horns of th...

Embodiment 2

[0030] refer to image 3 and Figure 4 :

[0031] In this embodiment, the material enters the mixing tank from the feed port 18; the four ultrasonic generators 9 are installed on the hole in the wall of the mixing tank 1 and the installation boss 17 through the flange inclined at 45 degrees, and the ultrasonic waves in the direction of 45 degrees are inclined to the material. Energy field effect. In this example, 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 particles with a 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: 4 ultrasonic horns are installed vertically on the lid of the mixing tank, the distance between the tool head and the bottom of the tank is 50 mm, and the 4 ultrasonic horns are installed on the tank wall with an inclination of 45°. The ultrasonic energy fields of the straight and inclined ultrasonic generators have a cross-converging effect on the material. In this example, 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 particles with a 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 of nanotechnology research. At present, most of the methods used to prepare nanomaterials are gas-phase and liquid-phase methods. These methods have disadvantages such as complex process, fine operation, high cost or difficult preparation of precursors. , only a small amount of sample preparation in the laboratory can be realized, 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 new material synthesis, chemical reaction, and enhancement of transfer process. Ultrasonic wave is not only a form of wave, but also a form of energy. It interacts with the medium in the process of propagation to p...

Claims

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Application Information

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Patent Type & Authority Patents(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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