A method for multi-stage enrichment and comprehensive recovery of gold, silver, copper and zinc from cyanidation gold extraction waste residue

A technology of gold, silver and waste residue, which is applied in the field of recycling and utilization of cyanidation gold extraction waste residue, can solve the problems of inoperability, complicated process and high cost, and achieve the elimination of pollution hazards, great economic benefits, and prolong the chain of comprehensive utilization of resources Effect

Active Publication Date: 2018-10-19
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention patent highlights the pre-treatment method of cyanide tailings flotation high-grade sulfur concentrate, which appears to be extremely complicated. The steam heating method is practical for small-scale production systems, and can be used for large-scale production and processing plants. High consumption, high cost, not operable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for multi-stage enrichment of gold, silver, copper, and zinc in cyanidation gold extraction waste residue and comprehensive recovery, comprising the following steps:

[0028] 1) Mixed decyanation technology:

[0029] Mix the cyanidation gold extraction waste slag with the high-temperature hot slag produced by roasting acid production at a mass ratio of 10:1, and use warm dilute sulfuric acid produced by the purification section of the roasting acid production process for slurry adjustment, and control the pulp concentration to 10wt %, control the pH=4.5, control the temperature of the whole process to be 70°C, stir for 60 minutes, then place the pulp in the concentrator to concentrate, the overflow returns to the roasting acid purification section for recycling, the concentration of the bottom flow pulp is 30wt%, and directly enters the floating selection process;

[0030] 2) Sulfur concentrate technology for enriching gold and silver by flotation:

[0031] A...

Embodiment 2

[0043] A method for multi-stage enrichment of gold, silver, copper, and zinc in cyanidation gold extraction waste residue and comprehensive recovery, comprising the following steps:

[0044] 1) Mixed decyanation technology:

[0045] Mix the cyanidation gold extraction waste slag with the high-temperature hot slag produced by roasting acid production at a mass ratio of 15:1, and use warm dilute sulfuric acid produced in the purification section of the roasting acid production process to adjust the slurry, and control the pulp concentration to 20wt% , control the pH=5.5, control the temperature of the whole process to be 75°C, stir for 150 minutes, then place the pulp in the concentrator to concentrate, the overflow returns to the roasting acid purification section for recycling, the concentration of the bottom flow pulp is 40wt%, and directly enters the floating selection process;

[0046] 2) Sulfur concentrate technology for flotation enrichment of gold and silver:

[0047] ...

Embodiment 3

[0059] A method for multi-stage enrichment of gold, silver, copper, and zinc in cyanidation gold extraction waste residue and comprehensive recovery, comprising the following steps:

[0060] 1) Mixed decyanation technology:

[0061] Mix the cyanidation gold extraction waste residue with the high-temperature hot slag produced by roasting acid production at a ratio of 20:1, and use the warm dilute sulfuric acid produced in the purification section of the roasting acid production process to adjust the slurry, and control the pulp concentration to 29wt%. pH=6.5, the temperature of the whole process is 80°C, stirring for 240 minutes, and then the pulp is concentrated in the concentrator, and the overflow is returned to the roasting acid purification section for recycling. The concentration of the bottom flow pulp is 50wt%, and it directly enters the flotation process;

[0062] 2) Flotation enrichment gold and silver sulfur concentrate technology:

[0063] Add hydrogen peroxide 10k...

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Abstract

The invention relates to a multi-grade gold-solver-copper-zinc enriching and comprehensive recovering method for cyanide gold refining waste residues. The multi-grade gold-solver-copper-zinc enriching and comprehensive recovering method for the cyanide gold refining waste residues comprises the following steps that the first grade is a technology that decyanation is conducted after mixing cyanide gold refining waste residues, high-temperature hot residues generated by roasting acid-making and purifying warm dilute acid slurry mixing; the second grade is a gold-solver-sulfur-concentrate floating-selecting and enriching technology by using high efficiency mixing activator and floating agents; the third grade is a technology for iron ore concentrate generated through floating-selecting tailing magnetic-separation; the fourth grade is a technology for producing the iron ore concentrate by floating-selecting gold-solver-sulfur-concentrate, high-temperature roasting acid-making and enriching gold-solver-iron; the fifth grade is a wet-process gold-silver leaching technology for the iron ore concentrate by using environmental protection agents; the sixth grade is a precipitating enriching technology for gold and silver in leaching liquid; and the seventh grade is a comprehensive precipitating recovering recycling technology for copper and zinc in the leaching liquid after gold-silver extraction. According to the multi-grade gold-solver-copper-zinc enriching and comprehensive recovering method for the cyanide gold refining waste residues, the pollution and damages of the cyanide gold refining waste residues on surround environment are removed, through the multi-grade enriching technology, gold, solver, copper and zinc in the cyanide gold refining waste residues can be recovered comprehensively and integratedly, and the objectives of comprehensive processing and recovering, cyclic utilization and economic and environmental protection can be achieved.

Description

technical field [0001] The present invention relates to a recycling method of cyanidation gold extraction waste residue, in particular to a method for multi-stage enrichment of gold and silver and comprehensive recovery of cyanide gold extraction waste residue, which belongs to gold smelting waste residue, comprehensive recycling of resources, chemical industry Wastewater treatment and environmental protection fields. Background technique [0002] The treatment methods of gold concentrate in gold production mainly include direct cyanidation method, roasting cyanidation method, two-stage roasting cyanidation method, bacterial oxidation method, and hot pressing method. Except for direct cyanidation method, pretreatment process is required To eliminate the harmful effects on gold extraction, the pretreatment process can effectively eliminate the effects of harmful impurities and improve the gold and silver leaching rate. The main gold extraction method is the direct cyanidatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B7/00C22B11/00C22B19/20C22B19/30C22B15/00
CPCC22B1/02C22B7/007C22B11/042C22B15/0089C22B19/22C22B19/30Y02P10/20
Inventor 徐永祥王建政孙浩飞刘占林王其亮朱德兵郭建东
Owner SHANDONG GUODA GOLD
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