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A kind of method utilizing flake graphite to prepare graphene

A technology of flake graphite and flake graphite powder, which is applied in the direction of graphene, chemical instruments and methods, nano-carbon, etc., can solve the problems of low grade of flake graphite ore, unfavorable mass production, lengthy and complicated process, etc., and achieve long flotation time , prevent flocculation, good effect

Active Publication Date: 2019-03-05
山东南山科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] "Research on the Flotation Process of Flake Graphite" records that the ordinary flotation process of willow graphite uses one coarse grinding, six regrinding, eight refining, plus one roughing and one sweeping, and the middle ore returns step by step. Long and complicated
[0004] Due to the low grade and high purification cost of flake graphite ore, it is not conducive to mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Preparing coarsely broken flake graphite ore: adding flake graphite ore to a crusher for coarse crushing to obtain coarsely broken flake graphite ore;

[0036] 2) Preparation of ball mill slurry: add coarsely broken flake graphite ore, 5040 dispersant and water into the primary ball mill roller according to the mass ratio of 45:0.2:54.8, and ball mill to 40-60 mesh to obtain a primary slurry. The slurry is added to the secondary ball mill and ball milled to 80-120 mesh to obtain the ball mill slurry;

[0037] 3) Preparation of flake graphite A and flotation slurry A: The ball mill slurry and foaming agent prepared in step 2) are added to the flotation machine according to the mass ratio of 1000:0.03, and the foaming agent is polyoxyethylene dehydration Sorbitan fatty acid ester and pine oil are according to the composition of mass ratio 3: 1, and temperature is 70 ℃ of conditions under flotation 7h, obtain flake graphite A and flotation slurry A;

[0038] 4) Flotati...

Embodiment 2

[0051] 1) Preparing coarsely broken flake graphite ore: adding flake graphite ore to a crusher for coarse crushing to obtain coarsely broken flake graphite ore;

[0052] 2) Preparation of ball mill slurry: add coarsely broken flake graphite ore, 5040 dispersant and water into the primary ball mill roller according to the mass ratio of 45:0.2:54.8, and ball mill to 40-60 mesh to obtain a primary slurry. The slurry is added to the secondary ball mill and ball milled to 80-120 mesh to obtain the ball mill slurry;

[0053] 3) Preparation of flake graphite A and flotation slurry A: The ball mill slurry and foaming agent prepared in step 2) are added to the flotation machine according to the mass ratio of 1000:0.03, and the foaming agent is polyoxyethylene dehydration Sorbitan fatty acid ester and pine oil are according to the composition of mass ratio 3: 1, and temperature is 70 ℃ of conditions under flotation 7h, obtain flake graphite A and flotation slurry A;

[0054] 4) Flotati...

Embodiment 3

[0065] 1) Preparing coarsely broken flake graphite ore: adding flake graphite ore to a crusher for coarse crushing to obtain coarsely broken flake graphite ore;

[0066] 2) Preparation of ball mill slurry: add coarsely broken flake graphite ore, 5040 dispersant and water into the primary ball mill roller according to the mass ratio of 45:0.2:54.8, and ball mill to 40-60 mesh to obtain a primary slurry. The slurry is added to the secondary ball mill and ball milled to 80-120 mesh to obtain the ball mill slurry;

[0067] 3) Preparation of flake graphite A and flotation slurry A: The ball mill slurry and foaming agent prepared in step 2) are added to the flotation machine according to the mass ratio of 1000:0.03, and the foaming agent is polyoxyethylene dehydration Sorbitan fatty acid ester and pine oil are according to the composition of mass ratio 3: 1, and temperature is 70 ℃ of conditions under flotation 7h, obtain flake graphite A and flotation slurry A;

[0068] 4) Flotati...

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Abstract

The invention relates to a method for preparing graphene from flake graphite. The flake graphite is subjected to ball milling, flotation, oxidation, reduction and drying to obtain graphene. The graphene prepared according to the method has advantages of high purity, large specific area and few layers.

Description

technical field [0001] The invention relates to a method for preparing graphene by utilizing flake graphite. Background technique [0002] Flake graphite Graphite crystals are in the form of scales; this is metamorphic under high-intensity pressure, and can be divided into large scales and fine scales. Flake graphite ore is characterized by low grade, generally between 2-3% or 10-25%. Flake graphite is one of the ores with the best buoyancy in nature, and high-grade graphite concentrate can be obtained through multiple grinding and multiple selection. The floatability, lubricity, and plasticity of this type of graphite are superior to other types of graphite, so it has the greatest industrial value. [0003] "Research on the Flotation Process of Flake Graphite" records that the ordinary flotation process of willow graphite uses one coarse grinding, six regrinding, eight refining, plus one roughing and one sweeping, and the middle ore returns step by step. Long and complic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19
CPCC01B2204/04C01B2204/30C01B2204/32
Inventor 李恕广李泰胧孙健于永杰
Owner 山东南山科学技术研究院有限公司
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