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Method for producing high-purity gold and copper sulphate from gold-bearing copper sludge

A technology of copper sludge and sludge, which is applied to the improvement of process efficiency, photography technology, instruments, etc., to achieve the effect of reduction, good separation effect and simple operation

Active Publication Date: 2013-11-20
ZIJIN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on resource utilization of gold-bearing copper sludge

Method used

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  • Method for producing high-purity gold and copper sulphate from gold-bearing copper sludge
  • Method for producing high-purity gold and copper sulphate from gold-bearing copper sludge
  • Method for producing high-purity gold and copper sulphate from gold-bearing copper sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The phase analysis of the gold-bearing copper sludge produced by a copper-bearing gold ore in the cyanide-rich solution in the process of oxidizing and removing cyanide with hydrogen peroxide shows that copper mainly exists in the form of copper hydroxide and basic copper carbonate, and A small amount of precipitates in other forms of copper exists, and the analysis results of the main elements of the sludge are shown in Table 1.

[0039] Table 1 Analysis results of main elements of a gold-bearing copper sludge / % (dry basis)

[0040]

[0041] Note:" ※ "The unit is g / t, the same below.

[0042] The method for producing high-purity gold and copper sulfate with gold-bearing copper sludge comprises the following process steps in sequence:

[0043] The first step of separation of gold and copper: the above-mentioned gold and copper sludge with a moisture content of 96.31% is sent to the carbon adsorption system, and activated carbon is used to adsorb gold to realize th...

Embodiment 2

[0055] The phase analysis of the gold and copper sludge produced by a copper-bearing gold ore in the process of cyanide-rich solution using ozone oxidation to remove cyanide shows that copper mainly exists in the form of copper hydroxide precipitation, and a small amount exists in the form of basic carbonic acid The main element analysis results of the sludge are shown in Table 3.

[0056] Table 3 Analysis results of main elements of a gold-bearing copper sludge / % (dry basis)

[0057]

[0058] A method for producing high-purity gold and feed-grade copper sulfate by utilizing gold-containing copper sludge comprises the following process steps in sequence:

[0059] The first step of separation of gold and copper: the above-mentioned gold and copper sludge with a moisture content of 97.21% is sent to the carbon adsorption system, and activated carbon is used to adsorb gold to realize the separation of gold and copper. The carbon adsorption system is composed of 4-stage iron ...

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Abstract

The invention relates to a method for producing high-purity gold and copper sulphate from gold-bearing copper sludge. The method comprises the process steps of gold-copper separation, high-purity gold production and feed-grade copper sulphate production; in the gold-copper separation, cyanided pregnant solution generated through cyanide leaching of copper-bearing gold ores or carbon adsorption barren solution is fed to a carbon absorption system by virtue of gold-bearing and copper-bearing sludge which has a water content of 90-98% and is generated during an oxidative cyanogen removal process, gold is absorbed by active carbon and finally gold and copper are separated; in the high-purity gold production, a finished gold ingot is mainly prepared by the steps of gold-bearing carbon desorption-electrodeposition, electrodeposition gold sludge purification and ingot casting; and in the feed-grade copper sulphate production, feed-grade copper sulphate and washing solution are prepared by the working procedures of stirring and acid-leaching, evaporation and concentration and crystallization, and copper sulphate impurity removal. The method has the advantages of low treatment cost, strong adaptability, environmental friendliness, capability of realizing reduced, resourceful and harmless treatment on the gold-bearing and copper-bearing sludge, and the like, and is applicable to process of copper-bearing gold ores of which the cyanide soluble copper content is 0.04-0.1%.

Description

technical field [0001] The invention relates to a method for recycling metal sludge, in particular to a process for treating Cu(CN) by oxidation and removal of cyanide copper 2 - 、Cu(CN) 3 2- 、Cu(CN) 4 3- A method for producing high-purity gold and copper sulfate from cyanide-rich solution in the form of copper cyanide complex ions or gold-bearing copper sludge generated during carbon adsorption of lean solution. Background technique [0002] Copper-bearing gold ore is a typical refractory gold ore, and of course it is also an important gold resource in my country, especially processing copper-bearing gold ore with a cyanide-soluble copper content of 0.04% to 0.1% is a big challenge for operators. challenge. At present, carbon leaching, heap leaching, or a combination of carbon leaching and heap leaching are generally used to treat such copper-bearing gold ores, and then activated carbon is used to adsorb gold from the cyanide rich solution, and finally the untreated ad...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/08C22B3/26C25C1/12C22B15/00
CPCY02P10/20
Inventor 谭希发沈贤德巫銮东林斌龙翼甘永刚邓莉莉
Owner ZIJIN MINING GROUP
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