A method for comprehensive recovery of various metal elements in gold concentrate by step separation

Abstract

The invention relates to a gradient separation and comprehensive recovery method for multiple metallic elements in gold concentrate. According to the process, the first-grade technology is utilizing an efficient mixed activator and a flotation reagent for carrying out pre-flotation on the low-sulfur gold concentrate, the second-grade technology is carrying out alkali leaching cyanide gold extraction on high-sulfur concentrate, the third-grade technology is leaching gold and silver out of low-sulfur tailings through an environment-friendly medicament and a wet method, the fourth-grade technology is giving priority to lead and zinc concentrating for high-sulfur gold concentrate cyanide tailings namely first low-gold high-sulfur concentrate, the fifth-grade technology is selecting copper fromlead and zinc tailings in an activation manner, the sixth-grade technology is roasting acid making and enriching gold, silver and iron to produce iron ore concentrate through copper tailings namely second low-gold high-sulfur concentrate, and the seventh-grade technology is leaching gold and silver out of the iron ore concentrate through an environment-friendly medicament and a wet method. According to the process, the chain for comprehensively utilizing a low-sulfur gold concentrate resource is prolonged, the comprehensive recovery value of the resource and the grade quality of the productsare improved, the complete utilizing of the gold concentrate resource is achieved, and relatively high economic benefits, environment benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to a method for recovering metal elements from gold concentrates, in particular to a method for cascade separation and recovery of metal elements in gold concentrates, and belongs to the technical fields of flotation beneficiation, gold smelting and comprehensive recovery and utilization of mineral resources. Background technique [0002] In the gold smelting industry, the cyanidation gold extraction method is generally used. This method is divided into direct cyanidation method, roasting cyanidation method, two-stage roasting cyanidation method, bacterial oxidative cyanidation method, and hot-pressed oxidative cyanidation method. Except for the direct cyanidation method, the pretreatment process that is harmful to gold extraction is eliminated. The influence of harmful impurities is effectively eliminated through the pretreatment process, and the leaching rate of gold and silver is improved. The main gold extraction method is the...

AI Technical Summary

Problems solved by technology

The applicability of this invention patent is only limited to the cyanide tailings that have been pre-oxidized before cyanide leaching. During the process, sulfuric acid, ethylenediamine phosphate, acetone and other agents are added to float the gold-loaded organic carbon and Sulfide minerals, the process is complicated, and there are many kinds of agents to be added, especially the addition of sulfuric acid, which will inevitably cause the decomposition of cyanide to generate volatile hydrogen cyanide gas, which will cause harm to the environment. In addition, the addition of sulfuric acid will cause corrosion of equipment. The cost of anti-corrosion increases, which still affects the service life of the equipment