gold ore formed in copper extraction
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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-sulfide minerals.
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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
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The mechanism of gold extraction and copper
1997-3-1 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. Mineralogically the tailing consisted predominantly of magnetite, silicates, sulphides, haematite, goethite and
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Treatment of copper-rich gold ore by cyanide leaching ...
2015-3-2 cyanide leaching of gold from a synthetic copper bearing ore containing djurleite and bornite. They observed that the extraction of gold improved with increasing DO2 concentration from 8 mg/L to 20 mg/L. Cu2++4NH 3→Cu(NH3)4 2+ (6) It can be inferred from these earlier studies that the chemistry of ammoniacal cyanide leaching is rather
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Gold Extraction from Different Types of Ore
2020-1-10 Copper-bearing sulfide gold ore refers to some form of copper ore and gold symbiosis in the gold ore, and coexists with pyrite. For copper-bearing sulfide gold extraction, we can enrich gold in copper concentrate by flotation, and then
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(PDF) Pre-treatment of a Copper-rich Gold Ore for ...
This study was undertaken to assess sulphuric acid leaching in the presence/absence of hydrogen peroxide for the removal of copper as a pre-treatment process prior to
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Eliminating Copper from Gold Ore
2015-10-11 The Hunt method-calls for the direct treatment of the ore with a solution of potassium cyanide to which ammonium hydroxide has been added. The gold is thus extracted together with some copper, and the metals are recovered by electrolytic
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(PDF) Cyanide Leaching of Copper-Gold-Silver Ores
Copper leaching is currently carried out in sulphuric acid media, where the process is highly known and where metallurgical and economic performances are mostly reliable. However, acid leaching
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Gold Metallurgy Leaching in Cyanicides
2016-7-14 The principal cyanides in the calcine are copper, ferrous iron, and smaller amounts of Mo, Co, Ni, Mn, etc. Most of the cyanicides can be removed by water washing, but this step cannot be used owing to the loss of about $0.70 in gold
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Gold Extraction from Different Types of Ore
2020-1-10 8. Copper-bearing sulfide gold ore. Copper-bearing sulfide gold ore refers to some form of copper ore and gold symbiosis in the gold ore, and coexists with pyrite. For copper-bearing sulfide gold extraction, we can enrich gold in copper concentrate by flotation, and then comprehensively recover copper and gold by smelting.
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Establishing thE ProcEss MinEralogy of gold orEs
2015-12-16 content may give poor gold extraction due to tarnishing of the silver (Fleming, 1998). The presence of copper in the ore at above ±0.3% concentration may make direct cyanidation uneconomic without re-treating the Cu(CN)2 formed in leaching, through processes such as SART and Hannah. Iron sulfide ores and arsenic sulfide
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How Ore Deposits Are Formed? - Geology In
2021-4-13 Geologists demonstrate how large copper and gold deposits are formed. The enrichment process of these metals follows physical principles that are similar to the extraction of deep geothermal energy by hydraulic fracturing of the rock.
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Recovery of Gold and Silver and Removal of Copper, Zinc ...
2015-2-12 In general, the quality of precipitate in the cyanidation process will depend upon the nature of the ore being treated. The richer the pregnant solution is, the better the quality of the precipitate of gold and silver is, although this is modified by the presence of metals, such as copper, lead, zinc and iron. This behavior can be explained
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Extraction of gold (Au) involves the formation of
Roasted copper pyrite on smelting with sand produces FeSiO 3 as fusible slag and Cu 2 S as matte. For removing the gangue, FeS, silica present in the lining of the Bessemer converter, acts as a flux and forms slag (iron silicate) on reaction with FeO.
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Gold concentrations of magmatic brines and the
1999-6-17 Copper concentrations in the ore bodies are up to about 1 weight per cent (typical enrichment factor ∼ 200 compared to average crustal abundance), whereas gold
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Extraction of Gold
The ore is reduced to a fine state of division and amalgamated simultaneously in a stamp-mill, the solid gold-amalgam separated from the liquid mercury by filtration through leather under pressure, and the mercury distilled. Complete extraction of the gold by amalgamation is impossible, a part remaining in the mud of the stamp- mills.
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The role of ligands and oxidants in thiosulfate leaching ...
2017-8-28 The detrimental effect of high temperatures on gold extraction from an oxide ore (83 Au g/t + SiO 2, K, Na, Al, Mg, Si, AlOOH) has been related to the passivation caused by the reaction between copper(II) and thiosulfate, leading to the formation of copper(II) sulfide (4). The gold extraction from a sulfide concentrate reached a maximum at 60 ...
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Mineralogical factors affecting the extraction of gold in ...
2021-5-8 MINERALOGICAL FACTORS AFFECTING THE EXTRACTION OF GOLD IN VARIOUS ORES J. Li1* and J. Zhou2 1Mineralogy Group Manager and Senior Mineralogist, Zijin Mining Group, Xiamen, Fujian, China 361101, jing.li.mineralogy@qq 2Principal Consultant and Managing Director, Joe Zhou Mineralogy Ltd, Peterborough, Ontario, Canada K9L 2A6, joe.zhou.mineralogy@gmail
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Chemistry MCQs for Class 12 with Answers Chapter 6
2020-7-17 Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 6 General Principles and Processes of Isolation of Elements. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Chemistry General Principles and Processes of Isolation []
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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
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Effectiveness acidic pre-cleaning for copper-gold ore
The objective was to evaluate the amount of soluble copper in cyanide before and after acidic cleaning. From a gold ore containing copper, the study selected four samples containing 0.22%, 0.55%, 1.00% and 1.36% of copper. For direct cyanidation of the ore without pre-treatment, copper extraction by cyanide complexing ranged from 8 to 83%.
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Turning copper to gold -Projects - Regional Policy ...
2012-10-7 The Aljustrel mining complex in Alentejo, southern Portugal, is embarking on a major project to modernise its copper extraction and processing operations. Opening up new galleries. The complex, operated by mining company Almina, employs 500 people in the extraction of ore and the production of copper, lead and zinc concentrates.
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Recovery of Gold and Silver and Removal of Copper, Zinc ...
2015-2-12 In general, the quality of precipitate in the cyanidation process will depend upon the nature of the ore being treated. The richer the pregnant solution is, the better the quality of the precipitate of gold and silver is, although this is modified by the presence of metals, such as copper, lead, zinc and iron. This behavior can be explained
Read More
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The role of ligands and oxidants in thiosulfate leaching ...
2017-8-28 The detrimental effect of high temperatures on gold extraction from an oxide ore (83 Au g/t + SiO 2, K, Na, Al, Mg, Si, AlOOH) has been related to the passivation caused by the reaction between copper(II) and thiosulfate, leading to the formation of copper(II) sulfide (4). The gold extraction from a sulfide concentrate reached a maximum at 60 ...
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Prevention of copper dissolution during cyanidation
The improvement in gold extraction may also be, at least in part, due to the surface active agent passivating a possible gold cyanide (Au(CN) 2-) adsorbing component of the ore. It appears that the copper passivation is improved with lower degrees of amine ethoxylation and longer alkyl chain lengths.
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Gold concentrations of magmatic brines and the
1999-6-17 Copper concentrations in the ore bodies are up to about 1 weight per cent (typical enrichment factor ∼ 200 compared to average crustal abundance), whereas gold
Read More
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Extraction of Gold
The ore is reduced to a fine state of division and amalgamated simultaneously in a stamp-mill, the solid gold-amalgam separated from the liquid mercury by filtration through leather under pressure, and the mercury distilled. Complete extraction of the gold by amalgamation is impossible, a part remaining in the mud of the stamp- mills.
Read More
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Technical Resource Document: Extraction and
2016-3-27 EPA 530-R-94-013 NTIS PB94-170-305 TECHNICAL RESOURCE DOCUMENT EXTRACTION AND BENEFICIATION OF ORES AND MINERALS VOLUME 2 GOLD August 1994 U.S. Environmental Protection Agency
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Gold Metallurgy Leaching in Cyanicides
2016-7-14 Cyanidation as applied to ordinary gold and silver ores is a relatively simple process. When cyanicides {cyanide-consuming elements) are encountered in small amounts in the treatment of such ores, the various schemes already discussed, such as use of a lead salt or wasting barren solution, can usually be resorted to and successful operation maintained.
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