Preparation method and application of high-purity high-fineness graphite powder

A graphite powder, high-purity technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of complex steps, difficult operation, high cost, etc., achieve the effect of reducing the number of grinding times and simple preparation process

Active Publication Date: 2012-09-26
王宏晓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the steps of this method are too complicated, the operation is difficult, and the cost is high

Method used

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  • Preparation method and application of high-purity high-fineness graphite powder
  • Preparation method and application of high-purity high-fineness graphite powder
  • Preparation method and application of high-purity high-fineness graphite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the high-purity high-fineness graphite powder in the present embodiment specifically comprises the steps:

[0032] a) At room temperature, the graphite raw material was irradiated with gamma rays with a power of 10 KHz for 2 hours;

[0033] b) Use jet mill to pulverize the graphite raw material that has completed step a). Since the bond between carbon and carbon atoms in graphite has been interrupted by gamma rays, the bonding force between carbon and carbon atoms is greatly reduced. Therefore, graphite Raw materials are easily crushed and can be crushed to a smaller particle size than the prior art;

[0034] c) using high-purity water to carry out conventional wet grinding of the graphite raw material that has completed step b);

[0035] d) Pickling the graphite raw material that has completed step c), so as to remove the metal impurities mixed in the graphite powder. The acid solution used can be hydrochloric acid, sulfuric acid or nitric ac...

Embodiment 2

[0045]The preparation method of the high-purity and high-fineness graphite powder in the present embodiment specifically comprises the following steps: the graphite raw material is irradiated with γ-rays with a power of 85 KHz, and the duration is 2 hours. The other steps are the same as in the first embodiment. This will not be repeated here.

[0046] figure 2 Shown is the particle size distribution diagram of the high-purity and high-fineness graphite powder prepared in the present embodiment. As can be seen from the figure, the particle size of the graphite powder prepared by the present invention can reach about 2 microns.

Embodiment 3

[0048] The preparation method of the high-purity and high-fineness graphite powder in the present embodiment specifically comprises the following steps: the graphite raw material is irradiated with gamma rays with a power of 200 KHz, and the duration is 1 hour. The other steps are the same as in the first embodiment. This will not be repeated here.

[0049] image 3 Shown is the particle size distribution diagram of the high-purity and high-fineness graphite powder prepared in the present embodiment. As can be seen from the figure, the particle size of the graphite powder prepared by the present invention can reach about 2 microns. Compared with Example 1, it can be seen that the longer the time of being irradiated by radiation, the easier the graphite is to be pulverized.

[0050] The step of irradiating the graphite raw material with radiation in the present invention is mainly to break the bond between carbon and carbon atoms in the graphite, so that it can be ground more ...

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Abstract

The invention discloses a method for preparing high-purity high-fineness graphite powder, comprising the following steps of: a), irradiating graphite raw materials by rays under a room temperature; and b) grinding and pulverizing the graphite raw materials which are obtained after the treatment of step a) to obtain high-purity graphite powder. The graphite powder can be applied to preparation of coatings, plastics, rubbers, fibers, heat preservation cottons, power supplies and batteries. Because the preparation process is simple, the times for grinding can be greatly reduced, impurities are difficult to enter, and the high-purity graphite powder, of which the grain diameter is less than 1mm, can be prepared. The preparation method and the application can be widely applied to the field of graphite processing.

Description

Technical field [0001] The present invention involves a processing method of high -purity powder, especially a preparation method for high purity, high fineness graphite powder or other similar powder. Background technique [0002] Ultra -fine graphite powder materials are a high -tech material that began to develop in the mid -1980s. Its use is very wide and can be applied to ink, static carbon powder, paint, fiber, plastic, rubber, electrode and other fields.In modern industrial production, the common method of preparing ultra -fine graphite powder is mechanical ball mill and air flow crushing method.However, the disadvantage of the mechanical ball grinding method is that the energy consumption is large and the efficiency is low. The particle size of graphite powder produced by this method is generally not less than 10 microns, and it is easy to mix in impurities in graphite powder.The graphite powder can only be applied to some occasions with low purity and particle size requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y40/00C01B32/225
Inventor 王宏晓
Owner 王宏晓
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