Method for preparing cupric oxide powder by oxygenizing raw copper powder

Abstract

The invention provides a method for preparing cupric oxide powder by oxidizing crude copper powder, which relates to a method for preparing the cupric oxide powder that is used in powder metallurgy and is applicable to the method for producing the cupric oxide powder by taking the crude copper powder generated by electrolytic copper powder as raw material. The method is characterized in that ammonium nitrate is added into the crude copper powder, evenly mixed and then calcined to obtain the cupric oxide powder. By the method of the invention, the crude copper powder is not agglomerated during calcinations, the content of cupric oxide in the cupric oxide powder is more than 99 percent, the crude copper powder is quite porous after calcinations and needs not to be smashed, which can be packaged after being screened. The method of the invention is easy to operate and has obvious oxidation effect.

Description

Method for preparing copper oxide powder by oxidation of crude copper powder technical field The invention discloses a method for preparing copper oxide powder by oxidation of coarse copper powder, relates to a method for preparing copper oxide powder for powder metallurgy, and is applicable to the method for producing copper oxide powder by using the coarse copper powder produced in the production of electrolytic copper powder as a raw material. Background technique In the production of electrolytic copper powder, it is inevitable to produce blister copper powder. The amount of blister copper powder accounts for less than 15% of the electrolytic copper powder. For the treatment of this part of blister copper powder, most manufacturers return to the previous stage. After smelting, it is cast into copper plates, and then electrolyzed, which reduces the metal recovery rate and increases energy consumption. It is an effective treatment method to convert this part of coarse co...

AI Technical Summary

Problems solved by technology

The object of the present invention is to aim at the deficiencies in the above-mentioned prior art, and provide a method for preparing copper oxide powder by oxidizing coarse copper powder which can fundamentally solve the problems of easy sintering of coarse copper powder, impenetrable oxidation, and low powder forming rate.