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Method for closed cycle high-efficiency comprehensive recovery of multiple elements of gold concentrate

A multi-element, gold concentrate technology, applied in the direction of non-metallic elements, chemical instruments and methods, sulfur compounds, etc., can solve problems such as poor economic benefits, difficult production, desulfurization by roasting, incomplete decarbonization, etc. Achieve the effect of improving economic efficiency, realizing zero discharge and reducing pollution

Inactive Publication Date: 2012-12-19
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Concentrates containing copper, sulfur, arsenic, carbon, silver, and gold are refractory gold concentrates, and gold occurs in iron sulfide minerals, brass minerals, arsenopyrite, carbonate minerals, organic carbon and other minerals. Due to the complexity of the occurrence state of gold, the gold particles are wrapped and sealed by minerals, and the conventional cyanide process is used, the carbonaceous matter can absorb gold complexes from the cyanide solution to varying degrees, and form various compounds on the surface of gold. Protective layer, the recovery rate of gold and silver is very low, generally between 10-50%, especially when the carbon content is high, the recovery rate of gold and silver is almost zero, when using the common one-stage roasting cyanidation gold extraction method , the arsenic compound exists in the form of arsenate, and the arsenate will wrap precious metals such as gold and silver. Not only the recovery rate of gold and silver is very low, but also highly toxic gases such as arsenic oxide will be produced, making production difficult; Although the roasting cyanidation gold extraction method can effectively utilize the sulfur element in the mineral to produce sulfuric acid, and the arsenic element is transformed into a solid arsenic trioxide product that is recovered, but still due to the limitation of the technical conditions of the boiling roasting process, roasting to remove sulfur and decarburization Incomplete, the fine particles of gold in the gold concentrate form a secondary package during the two-stage roasting process, so that the leaching rate of gold in the cyanidation process can only reach 85-90%, and the gold content in the cyanide tailings is still as high as 5g / t The above results in low comprehensive utilization efficiency of resources and poor economic benefits.

Method used

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  • Method for closed cycle high-efficiency comprehensive recovery of multiple elements of gold concentrate
  • Method for closed cycle high-efficiency comprehensive recovery of multiple elements of gold concentrate
  • Method for closed cycle high-efficiency comprehensive recovery of multiple elements of gold concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Slurry mixing: In the slurry mixing tank, the sulfur-containing gold concentrate is mixed with sulfide ores of different components. The fineness of the gold concentrate is required to be 200 mesh, and the sulfur-containing mass fraction is 20-30%, and the arsenic-containing mass fraction is obtained. 5-8% sulfur-containing gold concentrate containing 1.5-3.5% copper by mass, adding water to adjust the sulfur-containing gold concentrate to a slurry containing 63% of the total mass fraction of solute;

[0028] 2) Two-stage roasting: The ore pulp is transported to the first-stage roasting device for one-stage roasting. The amount of oxygen used during roasting is 80-90% of the theoretical oxygen required for the oxidation of sulfur, arsenic, carbon and other chemical elements in the mineral to form oxides. , the roasting temperature is 550°C, and roasted for 20 minutes; the calcined sand obtained after the first-stage roasting enters the second-stage roasting device for...

Embodiment 2

[0039] 1) Slurry mixing: In the slurry mixing tank, the sulfur-containing gold concentrate is mixed with sulfide ores of different components. The fineness of the gold concentrate is required to be 300 mesh, and the sulfur-containing mass fraction is 20-30%, and the arsenic-containing mass fraction is obtained. 5-8% sulfur-containing gold concentrate containing 1.5-3.5% copper by mass, adding water to adjust the sulfur-containing gold concentrate to a slurry containing 65% of the total mass fraction of solute;

[0040] 2) Two-stage roasting: The ore pulp is transported to the first-stage roasting device for one-stage roasting. The amount of oxygen used during roasting is 80-90% of the theoretical oxygen required for the oxidation of sulfur, arsenic, carbon and other chemical elements in the mineral to form oxides. , the roasting temperature is 570°C, and roasted for 20 minutes; the calcined sand obtained after the first-stage roasting enters the second-stage roasting device for...

Embodiment 3

[0051] 1) Slurry mixing: In the slurry mixing tank, the sulfur-containing gold concentrate is mixed with sulfide ores of different components. The fineness of the gold concentrate is required to be 400 mesh, and the sulfur-containing mass fraction is 20-30%, and the arsenic-containing mass fraction is obtained. 5-8% sulfur-containing gold concentrate containing 1.5-3.5% copper by mass, adding water to adjust the sulfur-containing gold concentrate into a slurry containing 70% of the total mass fraction of solute;

[0052] 2) Two-stage roasting: The ore pulp is transported to the first-stage roasting device for one-stage roasting. The amount of oxygen used during roasting is 80-90% of the theoretical oxygen required for the oxidation of sulfur, arsenic, carbon and other chemical elements in the mineral to form oxides. , the roasting temperature is 600°C, and roasted for 20 minutes; the calcined sand obtained after the first-stage roasting enters the second-stage roasting device f...

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Abstract

The invention relates to a method for recovery and recycle of multiple elements in a liquid obtained by cyanidation tailing flotation and belongs to the technical field of gold smelting and treatment on a waste liquid obtained by flotation of lead, copper concentrate and sulfur concentrate in cyanidation tailings. The method comprises the following steps of carrying out flotation to obtain lead concentrate, carrying out comprehensive recovery of gold and silver in a liquid obtained by lead flotation, carrying out flotation to obtain copper concentrate, carrying out comprehensive recovery of gold, silver and copper in a liquid obtained by copper flotation, carrying out flotation to obtain sulfur concentrate, and recovering gold and silver by gold-loaded activated carbon desorption eletrolysis. The method improves resource comprehensive utilization efficiency, realizes closed cycle utilization of a flotation system liquid, realizes zero discharge of waste water, reduces the pollution of the surrounding environment, and improves economic benefits of enterprises.

Description

technical field [0001] The invention relates to the technical field of metallurgy and chemical engineering of precious metals and nonferrous metals, and in particular relates to a closed-loop method for efficiently and comprehensively recovering multiple elements of gold concentrate. Background technique [0002] Concentrates containing copper, sulfur, arsenic, carbon, silver, and gold are refractory gold concentrates, and gold occurs in iron sulfide minerals, brass minerals, arsenopyrite, carbonate minerals, organic carbon and other minerals. Due to the complexity of the occurrence state of gold, the gold particles are wrapped and sealed by minerals, and the conventional cyanide process is used, the carbonaceous matter can absorb gold complexes from the cyanide solution to varying degrees, and form various compounds on the surface of gold. Protective layer, the recovery rate of gold and silver is very low, generally between 10-50%, especially when the carbon content is high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/06C22B3/26C22B11/08C01B17/74
CPCY02P10/20
Inventor 徐永祥吕寿明王立新刘占林梁志伟郭建东
Owner SHANDONG GUODA GOLD
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