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Method for recycling gold and copper from copper-containing oxidization gold ores

A technology for copper oxidation and gold recovery, which is applied in the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of affecting the effect of activated carbon adsorption of gold, occupying the active points of activated carbon adsorption, and the effect of copper removal is not very ideal, and achieves leaching. The time is shortened, the leaching effect is obvious, and the effect of reducing infrastructure investment

Active Publication Date: 2014-02-12
厦门紫金矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is complicated, and a strong alkali needs to be added during the copper precipitation process, which increases the cost of the treatment process, and the copper removal effect is not very satisfactory; the activated carbon after degolding also adsorbs a large amount of copper ions, occupying the adsorption active point of the activated carbon, Affect the effect of activated carbon adsorption of gold, high copper carbon must be additional decopper operation, before it can be reused

Method used

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  • Method for recycling gold and copper from copper-containing oxidization gold ores
  • Method for recycling gold and copper from copper-containing oxidization gold ores
  • Method for recycling gold and copper from copper-containing oxidization gold ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw ore of a copper oxide gold ore has a gold content of 5.7g / t and a copper content of 0.6%. (1) The raw ore is firstly crushed, and the raw ore is crushed 4 ) 2 SO 4 , 5.4 grams of CaO, 0.6 grams of NaCN; (3) Use a mechanical stirring device to adjust the slurry after adding the leaching agent, so that the slurry is in a suspended state in the electrolytic cell, and the electrodeposition condition is to use a titanium plate coated with ruthenium iridium as the anode , the cathode adopts graphite cathode, the pole spacing is 5mm, and the current density is 150A / m 2 , the temperature of the electrowinning solution is normal temperature; (4) Connect direct current, after 12 hours of electrowinning of the ore pulp, filter and dry the leached slag, analyze the slag gold content and calculate the slag gold leaching rate, and analyze and test the slag-calculated gold leaching rate Reach 90%. (5) The supplementary part of the leaching reagent and water after electrowin...

Embodiment 2

[0024] Except that steps (1), (3), (4), and (5) are identical to Example 1, its embodiment data are as follows:

[0025] Take 300 grams of finely ground ore samples, add 750 mL of water to make a slurry, add 5.4 grams of NH to the slurry 4 HCO 3 , 5.4 g Ca(OH) 2 , 0.3 gram of NaCN; the leached slag was filtered and dried, the slag gold content was analyzed and the slag gold leaching rate was calculated, and the slag gold leaching rate reached 90%. After the filtrate after electrowinning is supplemented with some chemicals to the initial concentration, it is mixed with raw ore samples to continue electrowinning. The electrowinning conditions are the same as the first electrowinning, and the slag gold leaching rate is 90%.

Embodiment 3

[0027] Except that step (1) is identical with example 1, its embodiment data are as follows:

[0028] Take 300 grams of finely ground ore samples, add 750 mL of water to make a slurry, add 5.4 grams (NH 4 ) 2 SO 4 , 5.4 grams of CaO, 0.6 grams of NaCN; the pulp after adding the leaching agent is adjusted by a mechanical stirring device, so that the pulp is in a suspended state in the electrolytic cell. Cathode, the pole spacing is 20mm, the current density is 50A / m 2 , The temperature of the electrolysis solution is normal temperature; after 24 hours of electrolysis of the ore pulp, the leaching residue is filtered and dried, and the gold content is analyzed; the gold leaching rate reaches 91%.

[0029] Conventional method leaching comparison experiment: take 300 grams of finely ground ore samples, add 750 mL of water to make a slurry, add 5.4 grams (NH 4 ) 2 SO 4 , 5.4 grams of CaO, 0.6 grams of NaCN, stirring and leaching in a glass container for 48 hours, after leachi...

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Abstract

The invention relates to a method for recycling gold and copper from copper-containing oxidization gold ores, belonging to the technical field of wet-process metallurgy. The method comprises the following steps: firstly, carrying out ore-grinding and pulping onto the copper-containing oxidization gold ores, regulating the pH value by using an alkaline regulating agent in serous fluid and adding a leaching agent; with a titanium-based iridium-coated ruthenium coating electrode, stainless steel or lead alloy as an anode and a graphite plate, a stainless steel plate, a titanium plate or a carbon fiber as a cathode, carrying out leaching-electrodeposition at the current density of 50 A / m<2>-200 A / m<2> under the normal temperature, wherein most of gold and part of copper in the leached-electrodeposited ores are leached out and gathered on the cathode by in-situ electrodeposition reduction; and taking out the cathode plate which is gathered with gold and copper valuable metals as an electrodeposition anode, and carrying out electrodeposition in an electrolytic cell with sulfuric acid, so that anode dissolution-cathode electrodeposition is carried onto the gathered copper, and single-substance gold is collected in the form of anode mud. The method disclosed by the invention has the characteristics of being gentle in reaction condition, simple in process method, short in process flow, low in production cost, energy-saving and synergistic, environment-friendly and the like.

Description

technical field [0001] The invention relates to a method for extracting valuable metals, in particular to a method for recovering gold and copper by in-situ electrodeposition of ore pulp from copper-containing oxidized gold ore by cyanide leaching in-situ electrodeposition method. Background technique [0002] Copper-containing oxide ores are one of the common refractory gold ores. At present, for copper-containing oxide ores with low copper content and poor economic indicators for step-by-step extraction of copper and gold, the engineering methods mainly use sodium cyanide leaching or ammonium cyanide leaching. Law. Because the ore contains some copper oxide ore, the consumption of sodium cyanide can reach tens of kilograms per ton of ore during the cyanidation leaching method, and the leaching effect is poor, mainly due to the oxidation of copper and cyanide in the ore. Reduction, complexation and other reactions consume a large amount of cyanide and oxygen, which affects...

Claims

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Application Information

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IPC IPC(8): C25C1/20C25C1/12C22B3/14
CPCY02P10/20
Inventor 陈景河庄荣传黄怀国申大志王中溪熊明蔡创开林鸿汉叶志勇马龙
Owner 厦门紫金矿冶技术有限公司
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