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Purification method for graphite

A technology of graphite purification and powdered graphite, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high cost and high energy consumption, and achieve the reduction of energy consumption and cost, rapid gasification removal, The effect of improving the efficiency of graphite purification

Inactive Publication Date: 2014-09-03
付毅 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The invention provides a graphite purification method to solve the problems of relatively large energy consumption and relatively high cost in the current high-temperature method for purifying graphite under the premise of ensuring that the purity of the purified graphite reaches 99.99%.

Method used

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Embodiment 1

[0039] Please refer to the attached figure 1 , figure 1 The flow chart of the graphite purification method provided by Embodiment 1 of the present invention is shown.

[0040] figure 1 The process shown includes the following steps:

[0041] S101. Crushing the microcrystalline graphite raw ore with a fixed carbon content of 82%.

[0042] In the first embodiment, the raw material for graphite purification is microcrystalline graphite raw ore. Due to the large particle size of the microcrystalline graphite raw ore, in order to make the impurities in the microcrystalline graphite raw ore gasify more easily during the subsequent heating process, thereby improving the graphite purification effect, step S101 crushes the microcrystalline graphite raw ore. Crushing can reduce the particle size of microcrystalline graphite raw ore, and at the same time increase the specific surface area of ​​microcrystalline graphite raw ore, which is conducive to the precipitation of impurity gases ...

Embodiment 2

[0071] Please refer to the attached figure 2 , figure 2 The flow chart of the graphite purification method provided by Embodiment 2 of the present invention is shown.

[0072] figure 2 The process shown includes the following steps:

[0073] S201. Crushing the microcrystalline graphite raw ore with a fixed carbon content of 85.5%.

[0074] In the second embodiment, the raw material for graphite purification is microcrystalline graphite raw ore. Due to the large particle size of the microcrystalline graphite raw ore, in order to make the impurities in the microcrystalline graphite raw ore gasify more easily during the subsequent heating process, thereby improving the graphite purification effect, step S201 crushes the microcrystalline graphite raw ore. Crushing can reduce the particle size of microcrystalline graphite raw ore, and at the same time increase the specific surface area of ​​microcrystalline graphite raw ore, which is conducive to the precipitation of impurit...

Embodiment 3

[0104] Please refer to the attached image 3 , image 3 The flow chart of the graphite purification method provided by Embodiment 3 of the present invention is shown.

[0105] image 3 The process shown includes the following steps:

[0106] S301. Crushing the microcrystalline graphite raw ore with a fixed carbon content of 89%.

[0107] In the third embodiment, the raw material for graphite purification is microcrystalline graphite raw ore. Due to the large particle size of the microcrystalline graphite raw ore, in order to make the impurities in the microcrystalline graphite raw ore gasify more easily in the subsequent heating process, thereby improving the graphite purification effect, step S301 crushes the microcrystalline graphite raw ore. Crushing can reduce the particle size of microcrystalline graphite raw ore, and at the same time increase the specific surface area of ​​microcrystalline graphite raw ore, which is conducive to the precipitation of impurity gases du...

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Abstract

The invention belongs to the technical field of substance purification. A disclosed graphite purification method comprises the following steps: successively performing crushing and grinding on microcrystalline graphite raw ore with the fixed carbon content of 82%-95% by weight, so as to obtain powdered graphite raw ore; paving the powdered graphite raw ore in an electron beam furnace to form a powdered graphite raw-ore layer; and using an electronic beam to gradually heat the powdered graphite raw-ore layer with the single-time heating area not more than the focusing area of the electronic beam, and vacuumizing the electronic beam furnace, and controlling the vacuum degree of the electronic beam furnace to be less than 1*10<-4> mmHg, the single-time heating time to be 30 min-120 min and the highest heating temperature to be 3500 DEG C-4500 DEG C. The purity of graphite obtained by employing the provided graphite purification method reaches 99.99%, and the graphite purification method helps to solve the problems that a present high-temperature purification method for graphite is relatively large in energy consumption and relatively high in cost.

Description

technical field [0001] The invention relates to the technical field of graphite purification, and more specifically, relates to a graphite purification method. Background technique [0002] Graphite is one of the crystalline minerals of carbon. It is widely used in many fields due to its lubricity, chemical stability, high temperature resistance, electrical conductivity, thermal conductivity, plasticity, and coating properties. Graphite is mainly used as a refractory material in the metallurgical industry, and as a material for the production of carbon electrodes, electrode carbon rods and batteries in the electrical industry. Graphite milk made of graphite can be used as a coating for television picture tubes, and carbon products made of graphite can be used in many aspects such as generators, motors, and communication equipment. In the mechanical industry, graphite can be used as a lubricant for high-speed machinery such as airplanes, ships, and trains; in the chemical in...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/215
Inventor 付毅王景明孙勇
Owner 付毅
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