Cyanide residue three-level reverse thickening purifying method of gold concentrate smelting industry

Abstract

The invention relates to a cyanide residue three-level reverse thickening purifying method of a gold concentrate smelting industry, and belongs to gold industry solid waste treatment methods. Cyanidedore pulp is introduced into a first filter press to be filter-pressed, cyanide residues are added into a first pulp mixing groove to be subjected to pulp mixing and enter a first thickener to be thickened, underflow of the first thickener enters a second pulp mixing groove to be subjected to pulp mixing, supernatant of the first thickener overflows to sequentially enter a first stirring reactiondevice and a second stirring reaction device, hydrogen peroxide is added for treatment, and treating fluid automatically flows into a first buffer groove. The cyanided ore pulp mixed in a third pulp mixing groove enters a second buffer groove and enters a second filter press to be filter-pressed, and the cyanide residues filter-pressed in the second filter press are piled in a tailing pond. The cyanide residues are purified, the treated cyanide residues are legally piled, a contribution is made to valuable cyanide residue treatment of gold industry gold concentrate smelting enterprises, and the technology has high promotion applicability and lays a technical foundation for sustainable development of the gold industry.

Description

technical field

[0001] The invention relates to a method for treating solid waste in the gold industry in the field of environmental protection, in particular to a three-stage reverse dense purification method for cyanide slag in a gold concentrate smelting enterprise. Background technique

[0002] In the gold industry, the cyanide slurry produced by the cyanide process of gold concentrate smelting enterprises contains relatively high concentrations of cyanide, and the cyanide slag from the press filtration of the cyanide slurry is hazardous waste, which is difficult to handle and costs a lot. In view of the difficulty of direct treatment of cyanide slag, the method of treating cyanide after slurry mixing is generally adopted. The main treatment technology of cyanide is chemical breaking of cyanide, and strong oxidants are used to convert cyanide into non-toxic substances, including alkali chlorine method, Inco Many of these technologies introduce other ions, resulting in th...

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