Purification processing method for superhard grinding medium

A processing method and superabrasive technology, applied in the direction of inorganic pigment processing, chemical instruments and methods, fibrous fillers, etc., can solve the problems of large amount of acid, small amount of beaker feeding, large volatile acid gas, etc., to achieve acid consumption And the effect of reducing power consumption, reducing pollution, and concentrating treatment

Active Publication Date: 2011-10-19
HENAN FULAIGE ULTRAHARD MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the heating time is long, the amount of acid is large, the volatile acid gas is large, the pollution of heavy metal loss is serious, it is not conducive to environmental protection, the amount of feeding in a single beaker is small, and it needs to be processed many times if it is not clean at one time, and it needs to be boiled at high temperature. The beaker is easy to break, and there is a great potential safety hazard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Method steps of the present invention are as follows:

[0023] ①. According to the catalyst components used, the electrolytes matching the iron base, nickel base and cobalt base are respectively prepared, and the metal catalyst is precipitated on the anode plate by electrochemical methods. The matching method is implemented according to the existing technology. In this way, there is no heavy metal pollution, and at the same time, the post-sequence cooking acid also greatly reduces the emission of nitrogen dioxide.

[0024] ② For cubic boron nitride, since most of the catalysts for making cubic boron nitride are composed of alkali metals, alkaline earth metals and their nitrides, it is easy to decompose when exposed to water, without electrolysis, and directly separate hexagonal boron nitride with a shaking table after decomposition And cubic boron nitride, the recovered cubic boron nitride is directly boiled in acid.

[0025] ③. Drop acid during the subsequent acid coo...

Embodiment 2

[0030] Method steps of the present invention are as follows:

[0031] ①. According to the catalyst components used, the electrolytes matching the iron base, nickel base and cobalt base are respectively prepared, and the metal catalyst is precipitated on the anode plate by electrochemical method; the matching method is implemented according to the existing technology.

[0032] ②, and then use a shaker to separate hexagonal boron nitride and cubic boron nitride, and the recovered cubic boron nitride is directly boiled in acid.

[0033] 3. Acid is dripped in the subsequent acid boiling process; the acid used is perchloric acid, and the consumption is 70 drops / min.

[0034] ④. Heat to 250° by oil bath method, and stir evenly in the flask with a glass rod.

[0035] The composition of the electrolyte

[0036] Boric acid / g.l -1

[0037] Table 1

Embodiment 3

[0039] Method steps of the present invention are as follows:

[0040] ①. According to the catalyst components used, the electrolytes matching the iron base, nickel base and cobalt base are respectively prepared, and the metal catalyst is precipitated on the anode plate by electrochemical methods. The matching method is implemented according to the existing technology. In this way, there is no heavy metal pollution, and at the same time, the post-sequence cooking acid also greatly reduces the emission of nitrogen dioxide.

[0041] ② For cubic boron nitride, since most of the catalysts for making cubic boron nitride are composed of alkali metals, alkaline earth metals and their nitrides, it is easy to decompose when exposed to water, without electrolysis, and directly separate hexagonal boron nitride with a shaking table after decomposition And cubic boron nitride, the recovered cubic boron nitride is directly boiled in acid.

[0042] ③. Drop acid during the subsequent acid coo...

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PUM

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Abstract

The present invention discloses a method for purifying and processing ultrahard abrasive material, which comprises the steps: (1) according to the ingredients of the used catalyst, electrolytes that are matched with ferrum group, nickel group and cobalt group are respectively prepared; metal catalyst is separated out from an anode plate by utilizing an electrochemical method; (2) hexagonal boron nitride and cubic boron nitride are separated from each other; (3) in the subsequent acid boiling process, acid is dripped at the speed of 60-80 drops / min; (4) the mixture is heated to 200-300 DEG C and evenly stirred in a vessel. By adopting the technical proposal, the method has the advantages that handling capacity is large for a single time and can reach 0.35-0.4 million carats / kettle; the acid consumption and the electricity consumption can be greatly reduced, the cost is saved, and the pollution is lowered; by utilizing the electrochemical method, the metal catalyst can be easily recovered, the cost can be saved, and the pollution can be reduced; the process flow is shortened, the efficiency is improved, and the potential safety hazard is reduced.

Description

technical field [0001] The invention relates to a purification treatment method, in particular to a purification treatment method in the production of superhard abrasives. Background technique [0002] Superabrasives include diamond and cubic boron nitride. The artificially synthesized semi-finished products contain a large amount of impurities such as graphite, hexagonal boron nitride and metals, which must be removed in order to obtain pure and qualified superabrasive products. At present, the liquid phase oxidation method is commonly used in the industry. The abrasive is added to a beaker and treated with concentrated sulfuric acid, concentrated nitric acid and perchloric acid. The disadvantage of this method is that the heating time is long, the amount of acid is large, the volatile acid gas is large, the pollution of heavy metal loss is serious, it is not conducive to environmental protection, the feeding amount of a single beaker is small, and it needs to be processed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/68C09C3/00
Inventor 周士杰
Owner HENAN FULAIGE ULTRAHARD MATERIAL
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