Method and device for producing high-purity natural graphite

A natural graphite and pure natural technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high initial investment, long reaction time, difficult treatment of waste water and tail gas, etc., and achieve low equipment cost and high production efficiency. The effect of high efficiency and simple operation

Active Publication Date: 2012-07-11
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

Therefore, not only to produce high-purity graphite, but also to overcome the problems of high initial investment, long reaction time during purification, difficult treatmen

Method used

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  • Method and device for producing high-purity natural graphite
  • Method and device for producing high-purity natural graphite
  • Method and device for producing high-purity natural graphite

Examples

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Example Embodiment

[0019] Example 1

[0020] Weigh natural graphite powder with a purity of 90%-98%, and start a special device for producing high-purity natural graphite (see figure 1 ), argon pressure: 0.8MPa, powder feeding rate 100g / min, cooling water flow rate: 1.2M / s, using 80KW plasma generator, adjust its working current 20-60A, working voltage: 30-50V, make the plasma generator A high temperature zone of 3000-3600°C is generated between the cathode and anode. The gas and powder passages are designed in the insulator. The inner diameter of the gas and powder passages: 10mm. The inert gas argon is used to carry the natural graphite powder into the plasma generator. The natural graphite powder passes through the cathode and anode of the plasma generator at a high temperature of 300-3600℃. Time, so that all the ash in the graphite (mainly containing SiO 2 , A1 2 O 3 , Fe 2 O 3 , CaO, MgO) gasification and volatilization; during the purification process, natural graphite powder is always prote...

Example Embodiment

[0021] Example 2

[0022] Start the production of high-purity natural graphite special equipment (see figure 2 ), nitrogen pressure: 0.8MPa, powder feeding rate 145g / min, cooling water flow rate: 1.45M / s, using 80KW plasma generator, adjusting its working current 60-75A, working voltage: 50-80V, make the plasma generator A high temperature zone of 3600-4000℃ is generated between the cathode and anode. The gas channel 2.2 is still in the insulator 7, and the powder channel 2.3 is opened in the trapezoidal opening section of the upper part of the anode 1. The inner diameter of the gas and powder channels are both 10mm. The inert gas argon is used to carry the natural graphite powder into the plasma generator, and the natural graphite powder is passing through In the high temperature zone of 3600-4000℃ generated by the cathode and anode of the plasma generator, all the ash in the graphite (mainly containing SiO 2 , A1 2 O 3 , Fe 2 O 3 , CaO, MgO) gasification and volatilization; d...

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Abstract

The invention discloses a method and a device for producing high-purity natural graphite, and belongs to the technical field of the purification of inorganic nonmetallic materials. The method comprises the following steps of: carrying natural graphite powder at the concentration of between 90 and 98 percent into a plasma generator by using inert gas; and when the natural graphite powder passes through a high-temperature zone at the temperature of between 3,500 and 4,000 DEG C which is produced by the plasma generator, gasifying and volatilizing all the ash so as to ensure that the natural graphite powder at the concentration of between 90 and 98 percent is purified to obtain high-purity graphite powder at the concentration of over 99.9 percent. Compared with the conventional method and the conventional device, the invention has the advantages that: the method and the device are environment-friendly and low in energy consumption, the process is simple, the continuous production can be performed, the original crystalline structure of graphite is guaranteed not to be changed, and the like.

Description

technical field [0001] The invention belongs to the technical field of purification of inorganic non-metallic materials. In particular, it relates to a method and device for producing high-purity natural graphite. Background technique [0002] High-purity graphite refers to graphite with a mass ratio of more than 99.9%. It has the advantages of corrosion resistance, high temperature resistance, good electrical conductivity, thermal shock resistance, self-lubrication, and easy precision machining. It is an ideal inorganic non-metallic material. As an alternative material, it has a broad application space in high-tech and new technology fields. Use high-purity graphite as raw material to produce high-purity graphite crucibles, graphite electrodes, casting and sintering molds, fine-structure molded graphite and pyrolytic graphite, etc. These high-purity graphite products are widely used in occasions with high-end special requirements such as atomic energy industry, national d...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/205
Inventor 王振廷孟君晟赵春香徐家文孙俭峰梁刚
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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