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Separation and recovery process of graphite carbon mud for artificial diamond production

A synthetic diamond, separation and recovery technology, applied in the direction of carbon compounds, non-metallic elements, inorganic chemistry, etc., can solve the problems of high energy consumption, graphite loss, waste water pollution, etc.

Pending Publication Date: 2021-08-20
ZHONGNAN DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the chemical methods are alkali-acid method and hydrofluoric acid method, which require high-temperature calcination, high energy consumption, long time, serious graphite loss, and wastewater pollution problems.
The high temperature method mainly has the problems of high energy consumption and high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A separation and recovery process of graphite carbon mud for artificial diamond production, comprising the steps of:

[0026] (1) Graphite carbon mud pretreatment: the remaining graphite carbon mud after the abrasive grade diamond is purified (the graphite carbon mud is the residual graphite that has not been converted into diamond during the synthetic diamond synthesis process, which contains impurities such as nickel and iron, and the output In the process of physical purification of artificial diamond), first dry at 220°C for 2 hours, then use an ultra-micro impact mill (model CR600) for rough crushing for 3 minutes, and then use an impeller classifier to finely crush large graphite particles into graphite powder , through a 300-mesh sieve, for standby; the frequency of the ultra-micro impact mill is 25HZ, and the frequency of the impeller classifier is 30HZ;

[0027] (2) pickling and purification: adopt spherical electric heating reactor electric heating acid treatm...

Embodiment 2

[0045] A separation and recovery process of graphite carbon mud for artificial diamond production, comprising the steps of:

[0046](1) Graphite carbon mud pretreatment: The remaining graphite carbon mud after purification of abrasive grade diamonds is first dried at 240°C for 3 hours, then coarsely broken by an ultra-micro impact mill (model CR600) for 5 minutes, and then classified by the impeller The machine breaks the large graphite particles into graphite powder, passes through a 400-mesh screen for standby; the frequency of the ultra-micro impact mill is 30HZ, and the frequency of the impeller classifier is 40HZ;

[0047] (2) pickling and purification: adopt spherical electric heating reactor electric heating acid treatment to purify, specifically, add 16 parts (mass parts) hydrochloric acid, 13 parts in 10 parts (mass parts) graphite powder obtained in step (1) parts (parts by mass) of sulfuric acid, placed in a spherical electric heating reactor, stirred and reacted fo...

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Abstract

The invention belongs to the technical field of artificial diamond production, and particularly relates to a separation and recovery process of graphite carbon mud for artificial diamond production. According to the separation and recovery process of the graphite carbon mud for artificial diamond production, the graphite carbon mud after diamond purification is subjected to crushing processing and particle size screening, the screened material is subjected to acid pickling purification by adopting a spherical electric heating reaction kettle electric heating process, and the dried graphite powder is subjected to high-temperature roasting treatment, and finally, graphite powder which is detected to be qualified is obtained. Cyclic utilization of graphite in the production process of the artificial diamond is achieved, so that the production cost is effectively reduced, and graphite resources are saved. The process provided by the invention realizes recycling of graphite, and the ash content, nitrogen and oxygen content and particle size index of the recovered graphite meet production requirements.

Description

technical field [0001] The invention belongs to the technical field of artificial diamond production, and in particular relates to a separation and recovery process of graphite carbon mud for artificial diamond production. Background technique [0002] Graphite is a non-metallic mineral with various excellent properties such as high temperature resistance, thermal conductivity, electrical conductivity and corrosion resistance. It is an indispensable and important strategic resource for the development of my country's modern industry and military industry. my country is rich in graphite resources and has a resource base to support the development of emerging industries, but there are few high-grade and high-quality resources, and the proportion of crystalline graphite resource reserves is only 3.8%. [0003] The main synthesis process of abrasive grade diamond is: the graphite raw material is compressed by batching to obtain graphite core column, the graphite core column is s...

Claims

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Application Information

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IPC IPC(8): C01B32/215
CPCC01B32/215
Inventor 刘乾坤易良成王飞飞孙立伟车林张凤莲周飞肖兴刚
Owner ZHONGNAN DIAMOND CO LTD