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Method for recovering gold and copper from copper-containing cyanide precious liquid

A technology for cyaniding precious liquid and recovering gold, which is applied in the direction of improving process efficiency, can solve the problems of high cost and long process flow, and achieve the effect of low cost, short process flow and uniform liquid flow

Active Publication Date: 2016-06-22
厦门紫金矿冶技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly overcomes the disadvantages of long process flow and high cost common in existing treatment technologies, and provides another completely different method for recovering gold and copper from copper-containing cyanide liquid

Method used

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  • Method for recovering gold and copper from copper-containing cyanide precious liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Comprehensive recovery of gold and copper from cyanide solution of a copper-bearing gold mine in China. Cyanide noble solution (Au1.30mg / L, Cu34.86mg / L), steel wool with a diameter of 1mm was placed in copper-containing cyanide noble solution and soaked and corroded for 36 hours, and the corroded steel wool was loaded into the exchange column. The flow rate of column cyanide precious solution is 10ml / min, the adsorption residence time is controlled to be 36 hours, the comprehensive adsorption rate of gold exceeds 98.5%, and the adsorption rate of gold is less than 95%. 3.25kg / t, stop the adsorption, replace the steel wool, and proceed to the next batch of adsorption. Adsorption saturated steel wool adopts 30% nitric acid, L / S is 5:1 to remove impurities, remove impurities and slag king water gold, and prepare qualified gold mud by sodium sulfite reduction process. The comprehensive recovery rate of gold exceeds 97.80%, and the comprehensive recovery rate of copper exce...

Embodiment 2

[0029] Comprehensive recovery of gold and copper from cyanide solution of a copper-bearing gold mine in China. Cyanide noble solution (Au0.85mg / L, Cu38.91mg / L), put steel wool with a diameter of 0.5mm in the copper-containing cyanide noble solution for 24 hours and soak and corrode for 24 hours, put the corroded steel wool into the diameter of mm, volume It is an ion exchange column of L, by controlling the flow rate of the expensive cyanide solution entering the column to be 15ml / min, and controlling the adsorption residence time to be 24 hours, the comprehensive gold adsorption rate exceeds 99%, and when the gold adsorption rate is less than 95%, the poor adsorption solution is returned to the Re-adsorption, the gold grade of the steel wool to be adsorbed is 3.52kg / t, the adsorption is stopped, the steel wool is replaced, and the next batch of adsorption is carried out. Adsorption saturated steel wool uses 30% nitric acid to remove impurities, L / S is 5:1, removes impurities ...

Embodiment 3

[0032] Comprehensive recovery of gold and copper from ammonia cyanide liquid in a copper-bearing gold mine in China. Cyanide expensive solution (Au1.80mg / L, Cu20.58mg / L), steel wool with a diameter of 0.75mm was placed in the copper-containing cyanide expensive solution for 48 hours and soaked and corroded for 48 hours, the corroded steel wool was loaded into an ion exchange column, passed Control the flow rate of the expensive cyanide solution into the column to be 5ml / min, and control the adsorption residence time to be 72 hours. The comprehensive gold adsorption rate exceeds 99.5%, and the gold adsorption rate is less than 95%. The grade is 3.18kg / t, stop the adsorption, replace the steel wool, and proceed to the next batch of adsorption. Adsorption saturated steel wool uses 30% nitric acid to remove impurities, L / S is 5:1, removes impurities and slag, contains gold, and sodium sulfite reduction process to prepare qualified gold mud.

[0033] The comprehensive recovery rat...

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Abstract

The invention discloses a method for recovering gold and copper from a copper-containing cyanation pregnant solution, particularly a method for comprehensively recovering copper from a high-copper cyanation pregnant solution. The method comprises the following steps: corroding steel wool with the copper-containing cyanation pregnant solution, adsorbing gold copper by using the corroded steel wool, extracting gold from the steel wool with adsorbed gold and copper, and the like. Compared with the prior art, the method overcomes the defects in the background art, effectively recovers the gold and copper in the cyanation pregnant solution, has mature technique, can easily implement industrialization and the like.

Description

technical field [0001] The invention relates to the comprehensive recovery of valuable metal copper from copper-containing cyanide noble liquid, and has greater significance especially for the comprehensive recovery of copper from high copper-containing cyanide noble liquid. Background technique [0002] At present, the production of gold using gold-loaded carbon as raw material is a common production process in China. Among them, the gold-loaded carbon comes from the cyanide gold extraction process, that is, gold-bearing ore-cyanide leaching-activated carbon adsorption. However, in the cyanidation gold extraction process of copper-bearing gold ores, since the leaching of copper will produce copper-containing cyanide liquid, it is possible to obtain high-copper-loaded gold carbon, which will cause adverse effects on the analysis, electrowinning and smelting of gold. Bigger problem. [0003] In order to solve this problem, in the prior art, the comprehensive recovery of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B11/00C22B15/00C22B3/24
CPCY02P10/20
Inventor 黄怀国陈庆根林鸿汉张文波叶志勇熊明李晓伟许晓阳孙艳慧丁文涛
Owner 厦门紫金矿冶技术有限公司
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