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Preparation method of spherical microcrystalline graphite

A technology of microcrystalline graphite and spherical graphite, which is applied in graphite and grain processing, etc., can solve the problems of incomplete pulverization, low sphericity and low purity of spherical graphite, and achieve increased tap density, increased purity, and reduced specific surface area Effect

Inactive Publication Date: 2018-02-09
HUNAN GUOSHENG GRAPHITE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the problems of incomplete pulverization in the preparation process of spherical graphite in the prior art, and the prepared spherical graphite is not high in sphericity and low in purity, and provides a method for preparing spherical microcrystalline graphite. The preparation process is simple, the specific surface area of ​​the prepared spherical graphite is significantly reduced, and the tap density is improved

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  • Preparation method of spherical microcrystalline graphite

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Embodiment 1

[0031] The present embodiment provides a kind of preparation method of spherical microcrystalline graphite, comprises the following steps:

[0032] S1. Pretreatment: use microcrystalline graphite as raw material, obtain its dry concentrate after flotation, and then use a shearing machine for pretreatment with a power of 5KW and a rotating speed of 2500r / min to obtain coarsely crushed microcrystalline graphite;

[0033] S2. Shaping: the coarsely crushed microcrystalline graphite obtained in step S1 is finely crushed in the first pulverizer, the rotating speed of the first pulverizer is 2000r / min, and then the first classification, magnetic separation and second classification are carried out, The rotating speeds of the first classifier and the second classifier are respectively 1800r / min and 2000r / min to obtain the initial product of spheroidized graphite;

[0034] S3. Purification: the spherical graphite initial product obtained in step S2, after dedusting treatment, adopts 30...

Embodiment 2

[0038] This embodiment provides a method for preparing spherical microcrystalline graphite. The difference from Embodiment 1 is that in step S1, the power of the shearing machine is 8KW, and the rotation speed is 1500r / min.

Embodiment 3

[0040] This embodiment provides a method for preparing spherical microcrystalline graphite. The difference from Embodiment 1 is that in step S1, the power of the shearing machine is 6KW, and the rotation speed is 2000r / min.

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Abstract

The invention belongs to the technical field of graphite processing and discloses a preparation method of spherical microcrystalline graphite. The preparation method of the spherical microcrystallinegraphite, provided by the invention, comprises the steps of pre-treating, shaping, purifying and carrying out drying treatment. The step of pre-treating comprises the step of treating microcrystallinegraphite dry concentrate by adopting a shearing machine; the step of purifying is carried out in an ultrasonic reaction kettle by adopting an acidic water solution and a material. According to the preparation method of the spherical microcrystalline graphite, provided by the invention, the problems in a spherical graphite preparation process that the crushing is not complete and the prepared spherical graphite has low spherical degree and low purity are innovatively solved; the microcrystalline graphite is mechanically crushed and a physical collision process also can be generated, so that the raw material of the microcrystalline graphite is effectively crushed and purified; a preparation technology is simple, the specific surface area of the prepared spherical graphite is remarkably reduced and the tap density of the prepared spherical graphite is improved.

Description

technical field [0001] The invention belongs to the technical field of graphite processing, and in particular relates to a preparation method of spherical microcrystalline graphite. Background technique [0002] Microcrystalline graphite is a polycrystal formed by the aggregation of small crystal grains. The crystal grain size is less than 1 μm and is isotropic. The raw ore has high grade and the carbon content is generally 50-90%. The Lutang mining area in Chenzhou City is the most important graphite mining area in my country. It is known as the "Graphite Capital". The reserves of microcrystalline graphite account for 74.7% of the national microcrystalline graphite reserves, ranking first in the country, and the fixed carbon content is high. Its graphite products enjoy a good reputation at home and abroad. In recent years, the breakthrough development of microcrystalline graphite purification technology, the carbon content of the product has reached more than 99.999%, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/21B02C21/00B02C23/14
Inventor 林前锋李丽萍
Owner HUNAN GUOSHENG GRAPHITE TECH CO LTD
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