Method for purification of nickel-iron alloy

Abstract

The invention relates to a method for purification of a nickel-iron alloy. The method comprises the following steps of carrying out electrolysis treatment on a used powdery catalyst for artificial diamond synthesis, carrying out melting, carrying out vacuum-pumping of a reduction furnace, feeding hydrogen into the reduction furnace, carrying out reduction treatment, carrying out cooling, and taking out the reduced nickel-iron alloy. The used powdery catalyst for artificial diamond synthesis is melted and the waste residues are reduced, and a reduction process is carried out at a temperature of 1050 DEG C in the reduction furnace filled with hydrogen so that iron oxide and nickel oxide in the slightly dissolved iron alloy are reduced into the nickel-iron alloy having high purity; and other waste metals are reduced by hydrogen into volatile matters and then the volatile matters are treated. Through the method, the nickel-iron waste having high impurity content is treated to form the nickel-iron alloy powder having high purity. The method solves the problem of pollution of waste residue produced by artificial diamond and waste metal melting and guarantees stability of a catalyst product for artificial diamond synthesis.

Description

technical field [0001] The invention belongs to the technical field of extracting nickel-iron alloy, the main component of powder catalyst for synthetic diamond synthesis, and relates to a method for extracting and using the main component of nickel-iron alloy in used powder catalyst for synthetic diamond synthesis. Background technique [0002] The catalyst only acts as a catalyst and does not undergo a chemical reaction itself. But after the synthesis is over, it must be removed again. For a long time, synthetic diamond manufacturers have used nitric acid and sulfuric acid to dissolve metals. First, it pollutes the environment and is harmful to the health of operators. Second, the production cost is relatively high. According to investigations, a considerable number of synthetic diamond companies still use nitric-sulfur mixed acid to dissolve metals, and the metals are not recycled at all. 1,200 kg of sulfuric acid and 300 kg of nitric acid are used for 1 ton of synthetic...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned shortcoming of prior art ， The invention provides a method that not only solves the problem of waste slag pollution in the smelting process of artificial diamond and scrap metal, but also solves the stability of catalyst products for artificial diamond. The method of purifying ferronickel