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The method of cyanide balance in gold concentrate zinc cyanide powder displacement gold extraction process

A technology of cyanide and zinc cyanide, applied in the direction of improving process efficiency, etc., can solve problems such as ignoring the effect of cyanide adsorption and enrichment, not paying attention to the whereabouts of cyanide, and reusing cyanide in the system memory

Active Publication Date: 2016-11-30
CHANGCHUN GOLD RES INST
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Problems solved by technology

[0015] The traditional cyanide balance is only calculated based on the liquid-phase cyanide (total cyanide) concentration and the concentration of the pulp, ignoring the adsorption and enrichment effect of fine-grained solid-phase minerals and gold mud on cyanide, and not paying attention to the conversion of cyanide into ammonia nitrogen and sulfur in the production process. The whereabouts of cyanide, cyanate, etc., the amount of system memory, and the reuse of cyanide

Method used

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specific example

[0036] First, calculate the stock of cyanide in each system by confirming the amount of slurry or liquid stored in each equipment of each system of grinding, thickening, leaching, washing, replacement, and pressure filtration, and the concentration of cyanide (total cyanide meter directly measured by ore pulp). Secondly, confirm the quality and concentration of cyanide added in the whole process, and convert the input amount of cyanide in the whole system (in terms of CN mass); reconfirm the amount of cyanide in the final pollutants discharged in the system such as cyanide slag, waste water, and waste gas, Does not include the amount of volatilized cyanide, because the pH value of the cyanidation process of gold concentrate zinc cyanide powder replacement gold extraction process is between 11-12, the volatilization amount is very small under high alkalinity, and the leaching tank with oxygenation and strong stirring is added Cover, the volatilization amount is negligible, and t...

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Abstract

The invention discloses a method for achieving cyanide balance in a gold concentrate cyanidation and zinc powder replacement gold extraction process. According to the method, the cyanide balance, based on water and material balance, in the gold concentrate cyanidation and zinc powder replacement gold extraction process is dynamic balance and includes the balance among the input quantity, the quantity of lost cyanide which is decomposed or oxidized or deposited in the production process, the quantity of thiocyanide, cyanate, ammonia nitrogen and others which are converted into a liquid phase or solid phase, the total quantity of cyanide in discharged contaminants such as cyanide residues and cyanidation water treatment sludge or other gases or liquids and the quantity of cyanide which is destroyed by treatment in the production process but not recovered; and meanwhile the cyanide balance shows the stock of cyanide in various facilities in the production process and the quantity of cyanide which is recycled in the production process. Products of the gold concentrate cyanidation and zinc powder replacement gold extraction process are generally crude gold ingots free of cyanidation loss.

Description

technical field [0001] The invention relates to a method for balancing cyanide in gold concentrate zinc cyanide powder replacement gold extraction process, in particular to a method for balancing toxic material cyanide in the gold industry. Background technique [0002] Cyanide extraction of gold technology is the main modern gold production process. After the gold ore is enriched by flotation, the concentrate contains high gold grade and less quantity, which greatly reduces the scale and investment of cyanidation, the effect of reducing the amount of cyanide slag is obvious, the poor solution containing cyanide is reused, the environmental pollution is small and it can be realized Real estate gold is widely used in the gold industry. Cyanide is highly toxic, and the balance of cyanide in gold concentrate zinc cyanide powder replacement gold extraction process can promote the optimization of beneficiation conditions, reduce cyanide consumption, and clarify the way of cyanid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/08
CPCY02P10/20
Inventor 张微杨明远朱军章乔瞻
Owner CHANGCHUN GOLD RES INST
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