alternative lixiviant for gold leaching

Gold CIL amp; CIP Gold Leaching Process Explained CCD

Gold CIL amp; CIP Gold Leaching Process Explained CCD

Cyanide is a lixiviant, or reagent that is used to leach, often in tanks, gold from a solid matrix and form a gold cyanide complex. The gold cyanide complex is then extracted from the pulp or slurry by adsorption onto activated carbon.

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Dissolution Chemistry of Gold and Silver in Different

Dissolution Chemistry of Gold and Silver in Different

Cyanide has been recognized for a long time as a powerful lixiviant for gold and silver, forming very stable cyano complexes with both metals. While cyanide is very effective in leaching free milling ores, there are certain classes of gold and silver ores (i.e., carbonaceous, pyritic. arsenical

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Solution chemistry factors for gold thiosulfate DeepDyve

Solution chemistry factors for gold thiosulfate DeepDyve

Solution chemistry factors for gold thiosulfate heap leaching Wan, RongYu; LeVier, K.Marc 20030929 000000 Thiosulfate is an alternative lixiviant for the leaching of precious metals. Research and development of thiosulfate leach technology has been prompted by environmental concerns with the use of cyanide and problems associated

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MURDOCH RESEARCH REPOSITORY

MURDOCH RESEARCH REPOSITORY

lixiviants for secondary heap leaching of gold. In Proceedings of the Seventh Mill Operators Conference, 12 14 October, Alternative lixiviants for gold comprising chlorine, The potential of applying a secondary leach using a lixiviant other than cyanide was the subject of this study. In so doing, a change from alkaline cyanide to

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Gold cyanidation

Gold cyanidation

Gold cyanidation (also known as the cyanide process or the MacArthurForrest process) is a hydrometallurgical technique for extracting gold from lowgrade ore by converting the gold to a watersoluble coordination complex.

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A Novel Technique for Silver Extraction from Silver

A Novel Technique for Silver Extraction from Silver

A novel technique for silver extraction from Ag a novel method for silver extraction from silver sulphide ore is described. The leaching J.L. Hendrix, Thiourea; An Alternative Lixiviant for Gold and Silver Extraction, Proceedings of the 5thInternational Mineral Processing Symposium 68 Sept.,

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Gold/Silver Heap Leaching and Management

Gold/Silver Heap Leaching and Management

Gold/Silver Heap Leaching and Management Practices that Minimize the Potential for cyanide solution is used as the lixiviant at all heap leach operations. Currently, contamination from heap leach operations. These include alternative liner construction, oxidation of cyanide during

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New EcoFriendly, NonCyanide Based Alternative for Gold

New EcoFriendly, NonCyanide Based Alternative for Gold

To achieve and maintain the desired oxidation level of the complexing agent necessary to form the gold complex, the lixiviant is subjected to a unique electrochemical oxidation process.

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Alternatives to cyanide in the gold mining industry

Alternatives to cyanide in the gold mining industry

Moreover, gold halide complexes are generally unstable and critics remain sceptical about their widespread use because of the significant chemical and process control required during processing to maintain gold in solution [72] Conclusions This paper has reviewed the most promising alternative gold leaching agents to cyanide.

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Advances in Gold and Silver Processing

Advances in Gold and Silver Processing

HYPOCHLORITE LEACHING OF GOLD ORE W.T.Yen, R.A.Pindred and M.P.Lam Mining Engineering, Queen's University ABSTRACT Cyanide is a conventional lixiviant for gold extraction but its' toxicity is a major concern for the environmentalist There are many alternative noncyanide lixiviants, such as thiourea, thiosulphate, chlorine an'd hypochlorite

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IS THERE A GREEN CHEMISTRY APPROACH FOR LEACHING

IS THERE A GREEN CHEMISTRY APPROACH FOR LEACHING

The potential for an alternative to cyanide leaching of gold ores is examined in terms of green chemistiy. Also discussed is the potential of cyanide leaching beconling more environmentally

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Bottle Roll Testing for Cyanidation of Gold Ores

Bottle Roll Testing for Cyanidation of Gold Ores

Cyanide leaching of gold is a very common methodology for evaluation of low grade gold ores. Despite risks obtained using the commonly accepted testing conditions and alternative testing conditions were compared and discussed. 2. Experimental As the leaching lixiviant finds its way through the heap from top to the bottom, some

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Alternatives to cyanide in the gold mining industry what

Alternatives to cyanide in the gold mining industry what

Moreover, gold halide complexes are generally unstable and critics remain sceptical about their widespread use because of the significant chemical and process control required during processing to maintain gold in solution [72] Conclusions This paper has reviewed the most promising alternative gold leaching agents to cyanide.

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Jaeheon Lee Mining and Geological Engineering The

Jaeheon Lee Mining and Geological Engineering The

Alternative Lixiviant for Copper Leaching from Concentrate and Metal Scraps. Society for Mining, Metallurgy, and Exploration Arizona Meeting. Society for Mining, Metallurgy, and

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Gold cyanidation

Gold cyanidation

Gold cyanidation (also known as the cyanide process or the MacArthurForrest process) is a hydrometallurgical technique for extracting gold from lowgrade ore by converting the gold to a watersoluble coordination complex.

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Alternative lixiviants to cyanide for leaching gold ores

Alternative lixiviants to cyanide for leaching gold ores

The most advanced alternative lixiviant is thiosulfate leaching of carbonaceous pregrobbing ores, which has been largely developed by Newmont Mining, Placer Dome, and Barrick Gold.

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Thiosulfate Leaching as an Alternative to Cyanidation

Thiosulfate Leaching as an Alternative to Cyanidation

The heap leach studies at Newmont Gold in U.S.A. (Wan and Brierley, 1997) and the insitu leach studies in South Africa (Li, et al, 1995) also use copper cementation process to recover the gold from thiosulfate leach solution.

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Alternatives to cyanide in the gold mining industry what

Alternatives to cyanide in the gold mining industry what

Moreover, gold halide complexes are generally unstable and critics remain sceptical about their widespread use because of the significant chemical and process control required during processing to maintain gold in solution [72] Conclusions This paper has reviewed the most promising alternative gold leaching agents to cyanide.

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Alternatives to cyanide in the gold mining industry

Alternatives to cyanide in the gold mining industry

Abstract/Summary. This paper reviews a series of alternative lixiviant systems for the recovery of gold from ores and concentrates. For over 100 years, cyanide has been the leach reagent of choice in gold mining because of its high gold recoveries, robustness and relatively low costs.

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HALIDE AS AN ALTERNATIVE LIXIVIANT FOR GOLD PROCESSING

HALIDE AS AN ALTERNATIVE LIXIVIANT FOR GOLD PROCESSING

Table of contents conference proceedings. The table of contents of the conference proceedings is generated automatically, so it can be incomplete, although all articles are available in the TIB.

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Gold Ore Processing, Volume 15 2nd Edition Elsevier

Gold Ore Processing, Volume 15 2nd Edition Elsevier

Outlining best practices in gold processing from a variety of perspectives, Gold Ore Processing Project Development and Operations is a musthave reference for anyone working in the gold industry, including s, geologists, chemists, mining engineers, and many others.

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Thiosulfate as an Alternative Lixiviant to Cyanide for

Thiosulfate as an Alternative Lixiviant to Cyanide for

This literature review provides an update of ammoniacal thiosulfate as a potential lixiviant of gold, the history of thiosulfate leaching and recent progress on thiosulfate leaching of gold

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Alternatives to cyanide in the gold mining industry what

Alternatives to cyanide in the gold mining industry what

This paper reviews a series of alternative lixiviant systems for the recovery of gold from ores and concentrates. For over 100 years, cyanide has been the leach reagent of choice in gold mining because of its high gold recoveries, robustness and relatively low costs.

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A Kinetic Study Of Gold Leaching In CuBr NaBr

A Kinetic Study Of Gold Leaching In CuBr NaBr

A Kinetic Study Of Gold Leaching In CuBr 2NaBr System as an alternative for the leaching of gold. The variables analyzed were agitation, temperature, cupric bromide concentration and ion bromide concentration. Two mechanisms of dissolution bromide as an alternative lixiviant for gold extraction in the presence of sodium bromide

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Alternative Lixiviants to Cyanide for Leaching Gold Ores

Alternative Lixiviants to Cyanide for Leaching Gold Ores

With the commercialization of a thiosulfateleaching plant at Barrick Gold's Goldstrike operation, the interest in replacing cyanide by use of an alternative lixiviant will undoubtedly be more rigorously considered in the future.

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THIOUREA LEACHING OF GOLD AND SILVER Elsevier

THIOUREA LEACHING OF GOLD AND SILVER Elsevier

The review of recent literature relating to the use of thiourea as a lixiviant for gold and silver indicates only a modest level of activity and interest. Alkali cyanide leaching system remains the popular choice for treating gold and silver ores.

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ROSIA MONTANA GOLD CORPORATION S.A.

ROSIA MONTANA GOLD CORPORATION S.A.

ROSIA MONTANA GOLD CORPORATION S.A. FLOWSHEET AND LEACHING ALTERNATIVES FOR THE 4.1 Flowsheet and Lixiviant Alternatives 23 APPENDICES APPENDIX 1 BLOCK FLOWSHEETS OF OPTIONS. Cyanidation is the most common leaching alternative for gold and silver. There are several other

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Heap leaching a stack of gold MiningFeeds

Heap leaching a stack of gold MiningFeeds

Heap leaching has become a popular method of extracting gold, writes mining consultant Nicolaas C. Steenkamp and Leon Louw, writer, editor and specialist in African affairs and mining. Heap leaching is used to extract gold, copper, silver, uranium, and iodine. This method was first employed to

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A Kinetic Study Of Gold Leaching In CuBr NaBr System

A Kinetic Study Of Gold Leaching In CuBr NaBr System

A Kinetic Study Of Gold Leaching In CuBr 2NaBr System as an alternative for the leaching of gold. The variables analyzed were agitation, temperature, cupric bromide concentration and ion bromide concentration. Two mechanisms of dissolution bromide as an alternative lixiviant for gold extraction in the presence of sodium bromide

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IS THERE A GREEN CHEMISTRY APPROACH FOR

IS THERE A GREEN CHEMISTRY APPROACH FOR

The potential for an alternative to cyanide leaching of gold ores is examined in terms of green chemistiy. Also discussed is the potential of cyanide leaching

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