Gradient separation and comprehensive recovery method for multiple metallic elements in gold concentrate

A technology for metal elements and gold recovery, applied in the fields of flotation beneficiation, comprehensive recovery and utilization of mineral resources, and gold smelting, it can solve the problems of complex process flow, environmental hazards, equipment corrosion, etc. economic effect

Active Publication Date: 2019-02-19
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for stepwise separation and comprehensive recovery of multiple metal elements in gold concentrate, comprising the steps of:

[0032] 1) Pre-flotation: Low sulfur containing 10g / t gold, 10g / t silver, 0.1% copper, 0.1% lead, 0.1% zinc, 20% sulfur and 68% of fineness -400 mesh Gold concentrate is used as raw material, mixed with the liquid of the flotation system to control the concentration of the pulp to 50wt%, and then the pulp is ground to a fineness of -400 mesh to reach more than 90%, and 1000g / t of sodium metabisulfite activator, 800g / t of flotation collector sodium butyl xanthate and 100g / t of terpineol oil foaming agent, after a rough selection, a second sweep and a second selection flotation process, the output gold grade is 20g / t , silver grade 20g / t, copper grade 0.2wt%, lead grade 0.2wt%, zinc grade 0.2wt%, sulfur grade 48wt% high gold sulfur concentrate and gold grade 1.0g / t, silver grade 3g / t, Low-sulfur tailings with a sulfur grade of 1wt%;

[0...

Embodiment 2

[0040] A method for stepwise separation and comprehensive recovery of multiple metal elements in gold concentrate, comprising the steps of:

[0041] 1) Pre-flotation: 80% of the content is 30g / t gold, 45g / t silver, 0.3wt% copper, 0.3wt% lead, 0.3wt% zinc, 30wt% sulfur and fineness -400 mesh The low-sulfur gold concentrate is used as raw material, mixed with the flotation system liquid, the pulp concentration is controlled to 60wt%, and then the pulp is ground to a fineness of -400 mesh to reach more than 92%, and 1000g / t of sodium metabisulfite and 1000g / t sodium hexametaphosphate as activator, 500g / t sodium xanthate and 500g / t 25# black drug as flotation collector, 80g / t pine oil and 80g / t 2 #Oil is used as a foaming agent, and after a rough selection, a second sweep, and a second selection flotation process, the output contains a gold grade of 50g / t, a silver grade of 60g / t, a copper grade of 0.5wt%, and a lead grade of 0.5wt%. High gold-sulfur concentrate with zinc grade o...

Embodiment 3

[0049] A method for stepwise separation and comprehensive recovery of multiple metal elements in gold concentrate, comprising the steps of:

[0050]1) Pre-flotation: 70% of the content is 50g / t gold, 80g / t silver, 0.5wt% copper, 0.5wt% lead, 0.5wt% zinc, 40wt% sulfur and fineness -400 mesh The low-sulfur gold concentrate is used as raw material, mixed with the flotation system liquid, the pulp concentration is controlled to 70wt%, and then the pulp is ground to a fineness of -400 mesh to reach 95%, and sodium pyrosulfite, sodium hexametaphosphate, sodium hexametaphosphate, Each 1000g / t of copper sulfate is used as the activator, each of 400g / t of butyl xanthate sodium, 25# black medicine, and butylammonium black medicine is used as the flotation collector, and each of 100g / t of pine alcohol oil and 2# oil is used as the starting material. Foaming agent, after one roughing, second sweeping and second selection flotation process, the output gold grade is 80g / t, silver grade is 1...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00C22B11/08C22B3/12C22B3/46B03D1/002B03D1/014B03D1/016B03D101/02B03D101/04B03D103/02
CPCB03B7/00B03D1/002B03D1/014B03D1/016B03D2201/02B03D2201/04B03D2203/025C22B3/12C22B3/46C22B11/04C22B11/08Y02P10/20
Inventor 徐永祥王建政刘占林王其亮朱德兵薛希刚郭建东
Owner SHANDONG GUODA GOLD
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