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Diamond purification technology

A diamond and process technology, which is applied in the field of diamond purification process, can solve the problems of acid waste water, tail gas, high cost of waste water treatment, and deterioration of the production environment, so as to optimize the environment, reduce production cost input, and reduce labor intensity.

Active Publication Date: 2015-04-29
ZHONGNAN DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: a large amount of high-concentration strong acid is used, a large amount of sulfuric acid fume and NOx gas are generated during impurity removal and purification, and acid waste water is produced at the same time, which deteriorates the production environment and the cost of tail gas and waste water treatment is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The diamond purification process of this embodiment is carried out according to the following process: 300 kg of the mixture of diamond and graphite after the rough purification of graphite is fully mixed with 15 kg of magnesium carbonate powder (1200 mesh) to ensure that the magnesium carbonate powder penetrates into the inside of the graphite particles, and then packed in ceramic trays Inside, put the material ceramic tray into the oven preheated to 200°C and keep it warm for 1 hour; take out the ceramic tray and cool it to room temperature, feed the cooled material evenly to the mineral dressing shaker for physical separation, and place it at the receiving end of the mineral dressing shaker A pure diamond product is obtained, and the measured diamond purity is 99.92%.

Embodiment 2

[0018] The purification diamond process of the present embodiment is basically the same as that of Example 1, the difference is only: the particle size of magnesium carbonate powder is 1000 orders, the mixture of diamond and graphite is 300kg, plus magnesium carbonate powder 30kg, in 250 ℃ of baking ovens, insulation 2 hours.

[0019] The purity of the diamond measured in this embodiment is 99.98%.

Embodiment 3

[0021] The diamond purification process of the present embodiment is basically the same as in Example 1, the only difference being: the particle size of magnesium carbonate powder is 800 orders, the mixture of diamond and graphite is 300kg, plus magnesium carbonate powder 45kg, in 300 DEG C of oven, heat preservation 1 hour.

[0022] The purity of the diamond measured in this embodiment is 99.99%.

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Abstract

The invention belongs to the technical field of superhard material purification, and in particular relates to a diamond purification technology. The technical process comprises the following steps of: adding a bulk drug into a diamond and graphite mixture, uniformly mixing, then preserving the heat at the temperature of 200-400 DEG C for at least one hour, cooling to normal temperature, and performing separation by a shaker. According to a physical method, diamond can be separated from graphite, so that the investment in production cost is reduced, production of waste gas and wastewater is avoided, and the environment friendliness can be realized.

Description

technical field [0001] The invention belongs to the technical field of superhard material purification, and in particular relates to a diamond purification process. Background technique [0002] In the superhard material industry, synthetic diamonds are mostly synthesized by powder catalyst core column technology, high temperature and high pressure, and part of the graphite in the synthetic core column is transformed into diamond under the action of powder catalyst. In the post-processing and purification process of diamond, after the catalyst metal is extracted from the powder catalyst diamond synthesis pellet by electrochemical process, the obtained material is a mixture of diamond and graphite, and then enters the key step of diamond purification - the separation of diamond and graphite. [0003] In the known purification technology of artificially synthesized superhard materials, according to the density difference between diamond and graphite, the rough purifica...

Claims

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Application Information

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IPC IPC(8): C01B31/06C01B32/28
Inventor 刘善跃车林严国军郭浩沈远
Owner ZHONGNAN DIAMOND CO LTD
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