Flotation reagent for gold-containing thiocyanic castaway slag

Abstract

The invention discloses a flotation reagent for gold-containing thiocyanic castaway slag. The flotation reagent is composed of, by weight, 200-320 parts of sodium hexametaphosphate, 1500-2500 parts of sodium silicate, 40-60 parts of ethionine ester, 30-55 parts of copper sulfate, 66-110 parts of butyl xanthate, 133-220 parts of sodium isoamylxanthate and 50-110 parts of oil No.2. The sodium hexametaphosphate is adopted for inhibiting gangue; the sodium silicate is adopted for inhibiting iron minerals; the ethionine ester Z-200 serves as a collecting agent of copper sulphide; the copper sulfate serves as an activating agent; the butyl xanthate and the sodium isoamylxanthate serve as collecting agents; the oil No.2 serves as a foaming agent. When the flotation reagent is adopted for flotation of enriched concentrate fines, the grade is greatly increased; the metal content of flotation slag is low; the recovery rate is up to 80%; the gold-containing grade of enriched concentrate is increased to 20g / t, the silver grade is increased to 220g / t, and the sulphur content is up to 33%. The flotation cost is reduced to a great extent, resources are effectively recovered, and the environment is protected.

Description

technical field [0001] The invention belongs to the field of mineral flotation, and in particular relates to a flotation agent for gold-containing thiocyanation waste residue. Background technique [0002] Since the 1970s, my country has carried out large-scale mining and refining of gold. However, limited by the technology of the gold smelting industry at that time, the recovery technology of gold is basically the complexation of gold-bearing ore through crushing, ball milling, shaking table gravity separation or adding sodium cyanide under the condition of lime as a protective base to generate gold. After being smelted into gold through zinc powder replacement and other processes, the sulfur element is almost not recovered, and the recovery rate of gold is only between 65 and 70%. A large amount of gold-containing tailings are discarded after gold extraction and stored in the tailings pond . These gold-containing tailings are analyzed to contain sulfur, gold and silver, ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the existing gold-bearing tailings flotation recovery rate and low concentrate grade, and provide a flotation agent that improves the gold-bearing tailings flotation recovery rate and concentrate grade