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A process for preparing high-purity microcrystalline graphite with low energy consumption and in a large scale, and the high-purity microcrystalline graphite

A microcrystalline graphite, large-scale technology, applied in the direction of inorganic chemistry, non-metallic elements, carbon compounds, etc., can solve the problems of low purity of microcrystalline graphite, high energy consumption and high cost, and reduce energy consumption and cost, reduce energy consumption Consumption, the effect of increasing the specific surface area

Inactive Publication Date: 2018-01-09
HUNAN GUOSHENG GRAPHITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to aim at the problems of low purity, high energy consumption and high cost of microcrystalline graphite in the prior art, and to achieve the goal of reducing energy consumption and cost through improvement in the prior art, and realize industrialization. Provide a process for preparing high-purity microcrystalline graphite in large quantities with low energy consumption

Method used

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  • A process for preparing high-purity microcrystalline graphite with low energy consumption and in a large scale, and the high-purity microcrystalline graphite

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Embodiment 1

[0033] This embodiment provides a process for preparing high-purity microcrystalline graphite in large quantities with low energy consumption, comprising the following steps:

[0034] S1. Raw ore treatment: crush the microcrystalline graphite raw ore, and then carry out deep grinding on the microcrystalline graphite raw ore, and obtain the material with a fineness of -0.074mm through grinding, and the content of the material with a grinding fineness of -0.074mm accounts for 90% % of the raw ore samples are subjected to flotation, using a roughing process, four selections, and a sweeping process, followed by drying and magnetic separation to obtain microcrystalline graphite with a fixed carbon content of 90%;

[0035] In the raw ore treatment of this embodiment, the raw ore of microcrystalline graphite is Lutang graphite, wherein the moisture is 2.4%, the volatile matter is 2.99%, the ash content is 18.37%, and the carbon content is 78.64%;

[0036] S2. Purification by acid lea...

Embodiment 2

[0044] This embodiment provides a process for preparing high-purity microcrystalline graphite in large quantities with low energy consumption, comprising the following steps:

[0045] S1. Raw ore treatment: crush the microcrystalline graphite raw ore, and then carry out deep grinding on the microcrystalline graphite raw ore, and obtain the material with a fineness of -0.074mm through grinding, and the content of the material with a grinding fineness of -0.074mm accounts for 90% % of the raw ore samples are subjected to flotation, using a roughing process, four selections, and a sweeping process, followed by drying and magnetic separation to obtain microcrystalline graphite with a fixed carbon content of 90%;

[0046] In the raw ore treatment of this embodiment, the raw ore of microcrystalline graphite is Lutang graphite, wherein the moisture is 2.4%, the volatile matter is 2.99%, the ash content is 18.37%, and the carbon content is 78.64%;

[0047] S2. Purification by acid lea...

Embodiment 3

[0055] This embodiment provides a process for preparing high-purity microcrystalline graphite in large quantities with low energy consumption, comprising the following steps:

[0056] S1. Raw ore treatment: crush the microcrystalline graphite raw ore, and then carry out deep grinding on the microcrystalline graphite raw ore, and obtain the material with a fineness of -0.074mm through grinding, and the content of the material with a grinding fineness of -0.074mm accounts for 90% % of raw ore samples are subjected to flotation, such as figure 1 As shown, a roughing process is adopted for four times of selection and one sweeping process, followed by drying and magnetic separation to obtain microcrystalline graphite with a fixed carbon content of 90%;

[0057] In the raw ore treatment of this embodiment, the raw ore of microcrystalline graphite is Lutang graphite, wherein the moisture is 2.4%, the volatile matter is 2.99%, the ash content is 18.37%, and the carbon content is 78.64...

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Abstract

The invention relates to the technical field of microcrystalline graphite purification, and discloses a process for preparing high-purity microcrystalline graphite with low energy consumption and in alarge scale, and the high-purity microcrystalline graphite. According to the process, microcrystalline graphite raw ore is firstly crushed and ground, and flotation including one time of roughing, four times of cleaning and one time of scavenging is performed in match to increase the purity of the raw ore to the utmost through a physical method; an improved acid leaching purification method is adopted, the alkali leaching efficiency is increased, energy consumption is reduced, and the graphite recovery yield is increased; and finally a high-temperature purification method adopting a step-by-step heating manner is utilized to further reduce energy consumption for graphite purification, and the high-purity microcrystalline graphite the fixed carbon content of which is 99.993% or above can be finally obtained. The process overcomes a problem that microcrystalline graphite in the prior art is not high in purity, high in energy consumption and high in cost. Through improvements on the prior art, the process achieves an objective of reducing energy consumption and the cost, and achieves industrial production.

Description

technical field [0001] The invention relates to the technical field of microcrystalline graphite purification, and more specifically, relates to a process for preparing high-purity microcrystalline graphite in large quantities with low energy consumption and the high-purity microcrystalline graphite. Background technique [0002] Graphite is a high-energy crystalline carbon material, widely used in metallurgy, machinery, environmental protection, chemical industry, refractory, new energy, nuclear energy, electronics, fields such as medicine, military industry and aerospace. [0003] my country's natural graphite has good geological conditions, wide distribution, rich resources and good quality. Its reserves and output rank first in the world, and it is one of my country's advantageous minerals. Natural graphite can be divided into crystalline graphite and microcrystalline graphite according to the degree of crystallization. Among them, aphanitic graphite in Chenzhou account...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/215
Inventor 林前锋李丽萍
Owner HUNAN GUOSHENG GRAPHITE TECH CO LTD
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