Purification and graphitization method of graphite material

A graphite material and graphitization technology, applied in the chemical industry, sustainable manufacturing/processing, climate sustainability, etc., can solve problems such as inability to meet large-scale production of graphite, graphitization, etc., to reduce power consumption, Avoid heating to generate and transfer heat, the effect of uniform distribution

Active Publication Date: 2011-07-20
BTR NEW MATERIAL GRP CO LTD
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  • Abstract
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Problems solved by technology

However, only serial graphitization furnaces and Acheson-type graphitization furnaces cannot meet the needs of large-scale production of graphite.
Especially for the preparation of high-end lithium-ion battery anode materials, high-purity graphite, graphite fibers, etc., the requirements for graphitization are higher, and the existing graphitization methods cannot meet the requirements for graphite materials.

Method used

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  • Purification and graphitization method of graphite material
  • Purification and graphitization method of graphite material
  • Purification and graphitization method of graphite material

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. Purification and graphitization method of the present invention, adopt following steps:

[0019] 1. Put graphite products or carbon products into the graphite crucible in the furnace body. Graphite products are natural graphite powder with a fixed carbon content of more than 85%, artificial graphite powder, microcrystalline graphite powder, coking coal, coke or graphite electrodes, carbon The plain products are carbon nanotubes, carbon fibers, needle coke or petroleum coke with a fixed carbon content of more than 85%. Such as figure 1 and figure 2 As shown, graphite current distribution plates 3 are connected between the furnace end electrodes 2 at both ends of the furnace body, and 30 to 90 graphite crucibles 4 are connected in series between the current distribution plates 3, and the two ends of the furnace end electrodes 2 are pushing devi...

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Abstract

The invention discloses a purification and graphitization method of a graphite material, aiming at solving the technical problems of improving the quality of the graphite material, saving energy and reducing cost. The method comprises the following steps: putting a graphite product or a carbon product in a graphite crucible in a furnace body; heating to 900-1700 DEG C, and then introducing nitrogen or argon; continuing to heat to 1000-1950 DEG C, introducing chlorine and then continuing to rising the temperature to 1400-2300 DEG C; simultaneously, introducing bromine or a fluorine-containing gas, heating to 1800-3300 DEG C and then stopping heating; introducing the chlorine until the temperature is reduced to below 1000-2000 DEG C; and feeding nitrogen or argon lasting for more than 0-15 hours. Compared with the prior art, the ash content of the obtained graphite product is less than 0.00011%; electrical energy consumption is reduced; and the method has the advantages that the processis simple, the cost is low, the quality of the graphite product is stable, and energy is saved.

Description

technical field [0001] The invention relates to a processing method of non-metallic materials, in particular to a processing method of graphite materials. Background technique [0002] Graphite materials have broad market prospects in new technology fields such as energy, environmental protection, information, transportation, and national defense. Such as electrode materials for batteries, bipolar plates for fuel cells, flexible graphite sealing materials, coating materials for electronic information equipment, stealth materials for military equipment, etc. The deep processing products of graphite materials often have high added value, but the deep processing method is the most demanding link. Graphitization process is one of the important methods in deep processing. At present, the main graphitization processes in China include serial graphitization and Acheson graphitization. After the serial graphitization furnace appeared in the 1980s, it attracted the attention of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCY02P20/10
Inventor 岳敏王桂林闫慧青
Owner BTR NEW MATERIAL GRP CO LTD
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