gold and copper benefication from the copper ores

Gold and copper leaching from gold-copper ores and ...

2017-5-1  It is well known that cyanide soluble copper dissolves in cyanide solutions to form toxic copper-cyanide complexes such as Cu(CN) 2 −, Cu(CN) 3 2 −, Cu(CN) 4 3 −.A number of studies have been published to treat gold-copper ores by either adding ammonia to the conventional cyanidation process, or recycling cyanide after the leaching stage (La Brooy et al., 1991, Muir et al., 1991, Muir et ...

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Gold-copper ores - ResearchGate

Cyanide is the most widely used lixiviant for the extraction of gold from ores owing to its ability to form a strong complex with gold. However, many metals/minerals including copper minerals are...

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Gold and copper leaching from gold-copper ores and ...

The presence of cyanide soluble copper in the cyanidation of gold-copper ores and concentrates significantly increases the cyanide consumption in order to achieve sufficient gold recovery. In addition, cyanide recovery or cyanide detoxification/destruction processes are also required which adds extra cost to the process.

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Gold-Copper Ores - ScienceDirect

2016-1-1  Today, flotation is commonly used in the processing of primary copper–gold ores to produce a copper concentrate containing gold as a co-product, where the gold is recovered as a byproduct of copper smelting and refining (La Brooy, 1992). The gold is usually discrete and either free, associated with copper sulfides or associated with iron ...

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Gold and copper leaching from gold-copper ores and ...

Request PDF Gold and copper leaching from gold-copper ores and concentrates using a synergistic lixiviant mixture of glycine and cyanide The presence of cyanide soluble copper in the ...

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The mechanism of gold extraction and copper precipitation ...

1997-3-1  The copper minerals appeared as chalcopyrite (CuFeS2), chalcocite (Cu2S) and bornite (CusFeS4). Peko tailing is a copper-gold tailing which is deposited into dams and originates from the copper flotation of several ores. Its chemical composition is 1.5 ppm Au and 700-800 ppm Cu.

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(PDF) An Overview of Treatment of Copper-gold Ores

Recently, worldwide production of gold from copper-gold ores has increased and amounted to 20% of total gold production in 2009. Copper-gold ores prove difficult to treat with

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Eliminating Copper from Gold Ore

2015-10-11  Copper minerals, even though minor components of precious metal ores, dissolve in these cyanide leaching solutions, consume cyanide, cause fouling of mill solutions, and thus interfere with the precipitation and recovery of gold.2,3,4 Here is a summary of laboratory investigations on the use of cyanide solutions as extractants for copper

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Treatment of copper-rich gold ore by cyanide leaching ...

2015-3-2  noted that copper sulphide bearing gold ores yielded poor gold extraction and demanded high reagent dosages for their treatment. MUIR et al [8] reported that the ammoniacal cyanide leaching was an effective system for the recovery of gold from a copper-rich tailings (1.2%

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GLYCINE AS A LIXIVIANT FOR THE LEACHING OF LOW

2017-9-27  Copper-gold ores (oxides: Cu-Au ore A, sulfides: Cu-Au B and Cu-Au C) leaching in alkaline glycine solution that, Cu and Aurevealed simultaneously leach from both ore types. However, Cu leaches faster than gold. Glycine concentration, temperature, initial leach solution pH, dissolved oxygen had no significant influence on copper dissolution ...

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Flowsheet options for processing copper gold and gold ...

Copper and gold have similar cyanide metallurgy depending on the nature of the minerals present. The processing of gold copper and copper gold ores can be highly problematic, site specific and the process selection is dependent on ore grade, mineralogy, acid leach behaviour, cyanide chemistry, product saleability and environmental considerations.

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An electrochemical study of the copper-gold-cyanide system ...

Gold and copper often occur together in ores, an occurrence which creates processing difficulties since cyanide leach solutions are not selective for gold. Copper contamination can result in serious problems throughout the conventional carbon-inpulp process, often making the operation uneconomic. This thesis describes electrochemical studies of two ways of dealing with copper contamination.

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Treatment of copper-rich gold ore by cyanide leaching ...

2015-3-2  noted that copper sulphide bearing gold ores yielded poor gold extraction and demanded high reagent dosages for their treatment. MUIR et al [8] reported that the ammoniacal cyanide leaching was an effective system for the recovery of gold from a copper-rich tailings (1.2%

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The mechanism of gold extraction and copper precipitation ...

Abstract The cyanide-ammonia system is known as an alternative system for the treatment of complex copper-gold ores. Thermodynamic research on the Au Cu(Cu2O, Cu2S) CN− NH4+ O2 OH− H2O systems resulted in producing log(mol)-mol diagrams and δG values for relevant reactions. In log(mol)-mol diagrams the thermodynamic possibility of the existence of both the Au(CN)2− and Cu CN ions was found.

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COPPER Copper production - TU Delft

2008-12-16  Figure 1: Overview of copper production Benefication process Figure 2: Overview of a typical beneficiation process at a concentrator Sulfidic copper ores are too dilute for direct smelting. Smelting these materials would require too much energy and very large furnace capacities. The copper ore

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The mechanism of gold extraction and copper precipitation ...

The cyanide-ammonia system is known as an alternative system for the treatment of complex copper-gold ores. Thermodynamic research on the Au Cu(Cu2O, Cu2S) CN− NH4+ O2 OH− H2O systems resulted in producing log(mol)-mol diagrams and δG values for relevant reactions. In log(mol)-mol diagrams the thermodynamic possibility of the existence of both the Au(CN)2− and Cu CN ions was found.

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Technical Resource Document: Extraction and

2016-3-27  ORES AND MINERALS VOLUME 4 COPPER August 1994 U.S. Environmental Protection Agency Office of Solid Waste Special Waste Branch 401 M Street, SW Washington, DC 20460. Technical Resource Document: Copper i DISCLAIMER AND ACKNOWLEDGEMENTS This document was prepared by the U.S. Environmental Protection Agency

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Establishing thE ProcEss MinEralogy of gold orEs

Silver-rich ores and copper sulfide ores: Silver-rich ores and copper sulfide ores are often free-milling, but when the silver grade is high (>10 g/t) and/or the gold is present as electrum, the processing may need to

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CN104294057A - Method for extracting gold from copper ...

The invention discloses a method for extracting gold from copper-oxide oxidized gold ores. The method comprises the following steps: 1, carrying out ammonia-cyanide leaching on the copper-oxide oxidized gold ores to obtain an ore pulp; 2, adding hypochlorite into the ore pulp, and stirring to remove copper in order to obtain a copper removed ore pulp; 3, carrying out countercurrent washing on ...

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GLYCINE AS A LIXIVIANT FOR THE LEACHING OF LOW

2017-9-27  Copper-gold ores (oxides: Cu-Au ore A, sulfides: Cu-Au B and Cu-Au C) leaching in alkaline glycine solution that, Cu and Aurevealed simultaneously leach from both ore types. However, Cu leaches faster than gold. Glycine concentration, temperature, initial leach solution pH, dissolved oxygen had no significant influence on copper dissolution ...

More

Gold and copper leaching from gold-copper ores and ...

2020-12-11  Gold and copper leaching from gold-copper ores and concentrates using a synergistic lixiviant mixture of glycine and cyanide E.A. Oraby, J.J. Eksteen⁎,B.C.Tanda Western Australian School of Mines, Curtin University, GPO Box U1987, Perth, WA 6845, Australia

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GOLD FROM COPPER ORES, School Science and

GOLD FROM COPPER ORES GOLD FROM COPPER ORES 1911-10-01 00:00:00 caseThe line through the point of contact of a tangent, perpendicular to the tangent, must be a center line. Since a segment has but one right bisector and a circle has hut one center, a center line which bisects a

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Flowsheet options for processing copper gold and gold ...

Copper and gold have similar cyanide metallurgy depending on the nature of the minerals present. The processing of gold copper and copper gold ores can be highly problematic, site specific and the process selection is dependent on ore grade, mineralogy, acid leach behaviour, cyanide chemistry, product saleability and environmental considerations.

More

An electrochemical study of the copper-gold-cyanide system ...

Gold and copper often occur together in ores, an occurrence which creates processing difficulties since cyanide leach solutions are not selective for gold. Copper contamination can result in serious problems throughout the conventional carbon-inpulp process, often making the operation uneconomic. This thesis describes electrochemical studies of two ways of dealing with copper contamination.

More

COPPER Copper production - TU Delft

2008-12-16  Figure 1: Overview of copper production Benefication process Figure 2: Overview of a typical beneficiation process at a concentrator Sulfidic copper ores are too dilute for direct smelting. Smelting these materials would require too much energy and very large furnace capacities. The copper ore

More

The mechanism of gold extraction and copper precipitation ...

The cyanide-ammonia system is known as an alternative system for the treatment of complex copper-gold ores. Thermodynamic research on the Au Cu(Cu2O, Cu2S) CN− NH4+ O2 OH− H2O systems resulted in producing log(mol)-mol diagrams and δG values for relevant reactions. In log(mol)-mol diagrams the thermodynamic possibility of the existence of both the Au(CN)2− and Cu CN ions was found.

More

Establishing thE ProcEss MinEralogy of gold orEs

Silver-rich ores and copper sulfide ores: Silver-rich ores and copper sulfide ores are often free-milling, but when the silver grade is high (>10 g/t) and/or the gold is present as electrum, the processing may need to

More

Technical Resource Document: Extraction and

2016-3-27  ORES AND MINERALS VOLUME 4 COPPER August 1994 U.S. Environmental Protection Agency Office of Solid Waste Special Waste Branch 401 M Street, SW Washington, DC 20460. Technical Resource Document: Copper i DISCLAIMER AND ACKNOWLEDGEMENTS This document was prepared by the U.S. Environmental Protection Agency

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The leaching and adsorption behaviour of gold ores

2020-8-28  4.4 the effect of copper cyanide on gold leaching from oxide and sulphide ores 110 4.5 summary 114 chapters preg-robbing phenomena in the cyanidation of gold ores 116 5.1 objectives of this chapter 116 5.2 background information 116 5.3 preg-robbing behaviour by the ores at low cyanide concentrations 118

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New ideas on the exploitation of copper, tin, gold, and ...

ABSTRACT Over the last 25 years, new evidence has emerged of the scale of prospection for copper and its mining during the Early-Middle Bronze Age in Britain. We know of 12 mines worked in the period 2100–1600BC, whilst the largest mine on the Great Orme continued until the Late Bronze Age, with perhaps its maximum output which may have been equivalent to 30+ tons of copper metal sometime ...

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