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gold extraction from copper

Extracting gold from copper Finishing

2006. A. Dissolve all with aqua regia, then ppt out the copper with NaCl, then filter out the copper chloride and then ppt out the gold as pure with sodium metabisulfite mixed with water. Filter the gold fines and smelt. You could try dissolution in Nitric acid and that leaves the residue as gold. With excessive Cu, there is a lot of acid gas,brown and irritating so be careful.

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Eliminating Copper from Gold Ore

The gold is thus extracted together with some copper, and the metals are recovered by electrolytic precipitation, the gold, silver and copper falling to the bottom of the vats as a sludge. Zinc precipitation may also be used. The product is low grade.

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US20110083531A1 Selective gold extraction from copper

The invention relates to a method for recovering gold from an acid digest of a gold-containing copper anode slime. The acid digest is selectively extracted with an alcohol having low miscibility with water. Gold is then recovered from the resulting alcoholic extract.

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Recovering Gold from Copper Concentrate via the

gold and 0.7% copper. This equals the recovery of 87% gold and 98% copper, respectively. The gold-containing solu-tion was pumped through small carbon columns that removed gold down to a level less than 0.02 mg/L. Another commercial chalcopyritic copper concentrate containing 23.5% copper and 4.3 ppm gold was studied

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EXTRACTION OF GOLD, SILVER AND COPPER FROM THE COPPER

Key-words: Electrorefine, anode slime, copper. Abstract Copper sulphides Concentrates, from the flotation process of copper primary ore; contain, commonly, small amounts of precious metals, such as gold and silver. During the smelting process of those concentrate all gold and silver are practically in the blister copper, which is cast into anodes.

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GOLD EXTRACTION FROM A COPPER BEARING ORE BY

GOLD EXTRACTION FROM A COPPER BEARING ORE BY THIOSULPHATE LEACHING 85 Fig. 2 Effect of Thiosulphate on Gold Extraction pH 11, 0.01 M Cu++, 0.1M NH3 Fig. 4 Effect of Copper Ion on gold Extraction pH 11, 0.4 M 52O3-2, 0.2 M NH3 is 72.5%. Increasing the ammonia concentration to 0.2 M

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US20110083531A1 Selective gold extraction from

The invention relates to a method for recovering gold from an acid digest of a gold-containing copper anode slime. The acid digest is selectively extracted with an alcohol having low miscibility with water. Gold is then recovered from the resulting alcoholic extract.

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EXTRACTION OF GOLD, SILVER AND COPPER FROM THE COPPER

Key-words: Electrorefine, anode slime, copper. Abstract Copper sulphides Concentrates, from the flotation process of copper primary ore; contain, commonly, small amounts of precious metals, such as gold and silver. During the smelting process of those concentrate all gold and silver are practically in the blister copper, which is cast into anodes.

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Mechanism of selective gold extraction from multi-metal

The copper(i) species involved in the homogenous reduction of dissolved gold are produced almost exclusively through dissolution of previously electrodeposited copper with a tiny fraction of cuprous chlorocomplexes also formed during short ED step by a one-electron reduction of copper(ii) species .

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Recovering Gold from Copper Concentrate via the

gold and 0.7% copper. This equals the recovery of 87% gold and 98% copper, respectively. The gold-containing solu-tion was pumped through small carbon columns that removed gold down to a level less than 0.02 mg/L. Another commercial chalcopyritic copper concentrate containing 23.5% copper and 4.3 ppm gold was studied

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Gold-Copper Ores ScienceDirect

01-01-2016  Abstract. The association of gold and copper mineralization in commercially viable ore is a common occurrence. At one end of the spectrum is the predominantly copper ore, which contains levels of gold mineralization. This would be uneconomic to mine for its gold content, but the gold provides a significant opportunity value.

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Electrolytic Gold Extraction Mineral Processing

Gold occurs in several forms in nature: as free gold; in combination with sulphur, or in the metallic state associated with iron, copper and lead pyrites and as telluride of gold, Au Te2, silver, arsenic, antimony and zinc are often associated with the various pyrites.

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Extraction of Gold

Cathodes of mercury or amalgamated copper are employed, so that large particles of gold which fail to dissolve are directly amalgamated. Smelting Process of Gold The smelting process consists in the formation of an alloy of gold with silver and lead, and is similar to that employed in extracting silver.

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(PDF) Mineral Processing and Extractive Metallurgy

It was known that less than 2% of the cyanide consumed accounts for the dissolution of gold and=or silver in many gold operations and the majority of the cyanide was actually consumed by those cyanide soluble minerals found commonly in gold bearing ores (Marsden and House 1992).The direct recycling of the barren cyanide solution back to the gold leaching process may result in heavy buildup of copper cyanide complexes, which may suppress gold recovery since a high concentration of copper

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The leaching and adsorption behaviour of gold ores

gold was completely extracted by cyanide alone. The flotation feed and copper concentrate showed an enhancement in gold extraction due to the activated carbon adsorbing gold that would otherwise have been preg-robbed. However, this mechanism did not explain the behaviour of

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GOLD EXTRACTION FROM A COPPER BEARING ORE BY

GOLD EXTRACTION FROM A COPPER BEARING ORE BY THIOSULPHATE LEACHING 85 Fig. 2 Effect of Thiosulphate on Gold Extraction pH 11, 0.01 M Cu++, 0.1M NH3 Fig. 4 Effect of Copper Ion on gold Extraction pH 11, 0.4 M 52O3-2, 0.2 M NH3 is 72.5%. Increasing the ammonia concentration to 0.2 M

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US20110083531A1 Selective gold extraction from

The invention relates to a method for recovering gold from an acid digest of a gold-containing copper anode slime. The acid digest is selectively extracted with an alcohol having low miscibility...

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EXTRACTION OF GOLD, SILVER AND COPPER FROM THE COPPER

Key-words: Electrorefine, anode slime, copper. Abstract Copper sulphides Concentrates, from the flotation process of copper primary ore; contain, commonly, small amounts of precious metals, such as gold and silver. During the smelting process of those concentrate all gold and silver are practically in the blister copper, which is cast into anodes.

get price

Recovering Gold from Copper Concentrate via the

gold and 0.7% copper. This equals the recovery of 87% gold and 98% copper, respectively. The gold-containing solu-tion was pumped through small carbon columns that removed gold down to a level less than 0.02 mg/L. Another commercial chalcopyritic copper concentrate containing 23.5% copper and 4.3 ppm gold was studied

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copper gold extraction techniques butterfly

copper gold extraction techniques. Oct,the corresponding sulfur species in solution and copper extraction and gold solubilization are shown in the right graph gold solubilization is represented, not extraction, since soluble gold was added the negative time on this plot reflects the heating of the solution to c, in the absence of reagents

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extraction copper gold butterfly-babymassage

Extraction of Gold by Flotation Process. extraction of gold by flotation process is also used to process polymetallic goldbearing ores such as goldcopper, goldlead, goldbismuth, and goldcopperleadzincsulfur ore for this type of ore, the flotation process can effectively identify and extract various goldbearing sulfide concentrates, which is conducive to the comprehensive

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Study on Gold Extraction from Thiosulfate-Ethylenediamine

25-03-2020  Study on Gold Extraction from Thiosulfate-Ethylenediamine-Copper Ion System . Chao Deng, Pengzhi Xiang. a, * and Longjiang Liu . School of Chemical Engineering, Yunnan Open University, Kunming 650222, P.R. China

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Electrolytic Gold Extraction Mineral Processing

Electrolytic Gold Extraction Gold Amalgamation Process. In the amalgamation process the ore is run into a “stamp mill” lined with amalgamated copper Gold Chlorination. In chlorination the ore is ground, sometimes concentrated, and always roasted. The ore is then Cyanide Process. The

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(PDF) Mineral Processing and Extractive Metallurgy

It was known that less than 2% of the cyanide consumed accounts for the dissolution of gold and=or silver in many gold operations and the majority of the cyanide was actually consumed by those cyanide soluble minerals found commonly in gold bearing ores (Marsden and House 1992).The direct recycling of the barren cyanide solution back to the gold leaching process may result in heavy buildup of copper

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The leaching and adsorption behaviour of gold ores

gold was completely extracted by cyanide alone. The flotation feed and copper concentrate showed an enhancement in gold extraction due to the activated carbon adsorbing gold that would otherwise have been preg-robbed. However, this mechanism did not explain the behaviour of

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