Diamond synthesis rod purification process

Abstract

The invention discloses a diamond synthesis rod purification process. A diamond synthesis flake is subjected to ball-milling, elutriation, electrolysis in a basket, pouring out from the basket for elutriation, screening, gravity separation, oxidation to remove graphite, elutriation and drying. The process overcomes the defects of the prior art, the manufacturing process is simple, and due to adoption of the step of ball-milling, a part of the graphite and nearly all pyrophyllite can be abraded, so that both the electrolysis speed is accelerated and a step of removing the pyrophyllite later is canceled; through electrolysis physical screening, coarse particles are fed back to electrolysis, and the situation that catalyzed alloy which is not thoroughly electrolyzed is removed through acid is avoided, so that the economic efficiency is greatly improved, and pollution to the environment is reduced.

Description

technical field [0001] The invention relates to the technical field of diamond synthesis, in particular to a diamond synthesis rod purification process. Background technique [0002] During the synthetic process of synthetic diamond, sometimes there will be massive products of diamond, metal and graphite tightly combined, which are difficult to be cleaned by conventional acid treatment procedures and cannot be dispersed. The traditional process uses aqua regia or other agricultural strong acids to boil and soak repeatedly for many times, even if it is processed more than ten times, it is difficult to process thoroughly. The process is long and the amount of acid is large. There is also the use of hydrochloric acid electrolysis and then the corresponding oxide bubbles, the electrolyzed materials are fully soaked with a specific oxidant and acid mixture, and then gravity separation is used to separate graphite and diamond, but hydrochloric acid electrolysis causes air pollutio...

AI Technical Summary

Problems solved by technology

[0002] During the synthetic process of synthetic diamond, sometimes there will be lumpy products tightly combined with diamond, metal and graphite, which are difficult to be cleaned by conventional acid treatment procedures and cannot be dispersed.

The traditional process uses aqua regia or other agricultural strong acids to boil and soak repeatedly for many times, and it is difficult to treat thoroughly even after more than ten times. The process is long and the amount of acid is large.

There is also the use of hydrochloric acid electrolysis and then the corresponding oxide bubbles, the electrolyzed materials are fully soaked with a specific oxidant and acid mixture, and then gravity separation is used to separate graphite and diamond, but hydrochloric acid electrolysis causes air pollution problems, oxidation Water pollution problems caused by incomplete use of chemicals

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