method for concentration of gold in copper

US20100242681A1 Method for concentration of

Disclosed herein is a method for concentrating gold contained in a leach residue obtained in a copper hydrometallurgical process for recovering copper from a copper sulfide mineral to efficiently separate and recover gold from the leach residue. According to the method, a gold-bearing copper sulfide mineral is subjected to pressure leaching with sulfuric acid at a temperature higher than 102

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US8052774B2 Method for concentration of gold in

Disclosed herein is a method for concentrating gold contained in a leach residue obtained in a copper hydrometallurgical process for recovering copper from a copper sulfide mineral to efficiently separate and recover gold from the leach residue: a gold-bearing copper sulfide mineral is subjected to pressure leaching with sulfuric acid at a temperature higher than 102° C. and 112° C. or lower

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Copper Ore Processing Methods

2017-4-11 · Ores containing sulfide copper minerals together with enough sulfides of zinc, lead, iron, or other metals to warrant use of differential flotation to separate them and to make a separate concentrate of each. As with gold and other ores, details of practice

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GOLD ASSAY (FIRE ASSAY METHOD)

2016-11-18 · GOLD ASSAY(FIRE ASSAY METHOD) •Copper :similarly find the weight of copper using sample weight and percentage of copper present in strip. •Eg :if there is 6% of copper in XRF •Copper (in mg)=180X6 = 7.2 • 100 •Silver: add 2.3 to 3.0 times wt. of pure gold/check gold.

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(PDF) A Rapid Method for the Determination of Gold

2012-6-1 · The gold concentration of sandstone and shale collected from the Shimanto belt, southwestern Japan, was in the range 1.0-2.5 and 1.1-1.8 μg/kg, respectively, while the gold concentration of

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An Atomic-Absorption Method for the Determination of

2012-3-6 · gold is then extracted into methyl isobutyl ketone (MIBK), and the gold concentration is determined by atomic-absorption spectrophoto­ metry. Shima (1953) described a method of lf'aching gold from large samples ( 100-500 g) with a mixture of bromine and ethyl ether and esti­ mating the gold colorimetrically with dithizone.

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Gold processing Mining and concentrating Britannica

2 天前 · Gold processing Gold processing Mining and concentrating: The nature of the ore deposit determines the mining and mineral processing techniques applied. Oxide ore deposits are frequently of such low grade (e.g., 3 to 10 parts per million) that extensive

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Modelling and simulation of gold ore leaching

2009-11-20 · MODELLING AND SIMULATION OF GOLD ORE LEACHING 51 Nomenclature A A: Anodic surface area A C: Cathodic surface area: Ore gold concentration : Ore gold concentration before cyanidation begins: Cyanide concentration in solution: Ore copper concentration. dg: Length of cubic gold grain sides dp: Length of cubic ore particle sides: Cyanide diffusivity

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New methodology for determination of gold and

2011-9-1 · Method detection limits Method Detection Limits (MDLs) for gold, platinum and palladium were determined by measuring two sets of ten method blanks twice, on non-consecutive days, using the conditions as defi ned in the analytical method. The MDL was calculated as the 3 sigma standard deviation of the twenty concentration results.

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(PDF) Analytical methods for copper, zinc and iron

method should be based on several factors, such as the analysis. time, the cost and the required accuracy. The defective copper concentration. is responsible for the common phenotypes of these

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A study of the influence of copper on the gold

2009-8-26 · metallic copper than that for the reduction of aurodicyanide to metallic gold, signifies that gold should plate preferentially to copper at these conditions. However, copper may co-deposit with gold if high overpotentials are applied, or when the copper concentration is high relative to that of gold.2 Polarization diagrams

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The Method of Extracting Copper and Gold by

The Method of Extracting Copper and Gold by Bacterial Leaching The methods of extracting gold and copper have significant differences and therefore require separate attention. Prior to leaching occurring, either a tailings pile must be built up upon a base of impermeable rock or a series of holes drilled into the ore, to provide access for [IMAGE]

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Gold cementation on copper in thiosulfate solution

The rate of gold cementation on copper disc is proportional to the initial gold concentration and disc rotating speed. The cementation reaction exhibited two distinct kinetic regions, an initial slow rate followed by an enhanced rate. The activation energy of the reaction was 5.9 kJ/mol at low copper concentration and the reaction is mass

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Copper Ore Processing Methods

2017-4-11 · Ores containing sulfide copper minerals together with enough sulfides of zinc, lead, iron, or other metals to warrant use of differential flotation to separate them and to make a separate concentrate of each. As with gold and other ores, details of practice vary because of differences in the ores or on account of economic considerations.

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Compositions and method for stripping gold from

The method of stripping gold deposits from a copper substrate which comprises contacting a gold plated workpiece having a copper substrate with a gold stripping composition, having an alkaline pH, for a sufficient period of time to remove the gold from said workpiece at a rate of at least 1 micron per minute without attack on the copper

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chemical method of concentration of ore Prominer

Chemical method used in concentration of ore is known as. Leaching is a chemical method of concentration of ores. It involves the treatment of the ore with a suitable reagent so as to make it soluble while impurities remain insoluble. The ore is recovered from the solution by suitable chemical method.

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Analysis of intracellular copper ions content and

2020-11-1 · It was feasible to detect the copper ions in algae cells (in both intracellular and extracellular fluids) by gold nanorods and investigate the migration mechanism of copper ions in algae cells. That pH of water environment had influenced the migration process. The copper ion concentration had a significant impact on the transition process.

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4 Reasons and Solutions of Poor Gold Leaching Effect

2020-6-22 · When the content of copper and zinc minerals in gold is high (> 0.3%), if the increased cyanide consumption is too high, but no economic loss is caused, flotation method can be used to separate part of qualified copper and zinc concentrate, then flotation tailings, and then extract gold

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Method of measuring copper ion concentration in

1. A method of measuring copper ion concentration in industrial electrolytes using electrochemical analysis methods in the range of concentrations up to 60 g/l and electrolyte temperatures from 15 to 60° C., characterized in that, that according to the value of copper ion concentration, either cyclic voltammetry (CV) or chronoamperometry (CA) is used in two-electrode measuring system composed

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ASTM D1688 17 Standard Test Methods for Copper

4.2 Copper enters water supplies through the natural process of dissolution of minerals, through industrial effluents, through its use, as copper sulfate, to control biological growth in some reservoirs and distribution systems, and through corrosion of copper alloy water pipes. Industries whose wastewaters may contain significant concentrations of copper include mining, ammunition production

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High copper content of gold ore Prominer (Shanghai

2020-12-28 · High copper content of gold ore. 12-28-20; 119 Views; icon 0; Among the copper ore associated with gold ore, except for a few copper minerals such as chalcopyrite and chrysocolla, most minerals (such as malachite, azurite, chalcocite, etc.) have high solubility in cyanide solution . When gold cyanide leaching, these cyanides will "compete" with gold cyanide and oxygen, thus hindering the

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Standard Test Method for Fire Assay Determination of

1.1 This test method is for the determination of gold in copper concentrates in the concentration range from 0.2 to 17 g/g (0.007 to 0.500 Troy oz/short ton). Note 1 The lower scope limit is set in accordance with Practice E 1601. This standard does not purport to address all of the safety concerns, if any, associated with its use.

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The Method of Extracting Copper and Gold by

The Method of Extracting Copper and Gold by Bacterial Leaching The methods of extracting gold and copper have significant differences and therefore require separate attention. Prior to leaching occurring, either a tailings pile must be built up upon a base of impermeable rock or a series of holes drilled into the ore, to provide access for [IMAGE]

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A study of the influence of copper on the gold

2009-8-26 · metallic copper than that for the reduction of aurodicyanide to metallic gold, signifies that gold should plate preferentially to copper at these conditions. However, copper may co-deposit with gold if high overpotentials are applied, or when the copper concentration is high relative to that of gold.2 Polarization diagrams

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Gold cementation on copper in thiosulfate solution

The rate of gold cementation on copper disc is proportional to the initial gold concentration and disc rotating speed. The cementation reaction exhibited two distinct kinetic regions, an initial slow rate followed by an enhanced rate. The activation energy of the reaction was 5.9 kJ/mol at low copper concentration and the reaction is mass

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QUANTITATIVE ANALYSIS OF GOLD CONCENTRATE

2018-6-17 · gold concentration and the further method to nal determination. Basically there are three methods used for determining of gold likely gravimetry, titrimetry and instrumental. The last method for gold determination including atomic absorption spectroscopy(3), neu-tron activation analysis (4) and inductively coupled plasma spec-troscopy (5).

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Comparison of different extraction methods to determine

2009-6-28 · Refractory gold ores are not free milling and cannot be leached without some form of physical, chemical or pyro metallurgical pretreatment. Refractory gold is found in association with sulphides (pyrite, arsenopyrite and chalcopyrite), whereas native gold is associated with tellurides, bismuthides, silver, antimony and copper.

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TECHNICAL PAPER Purolite

2020-2-10 · Gold Recovery from Copper-Rich Ores Employing the Purolite S992 Gold-Selective Ion Exchange Resin This paper discusses the use of a commercially available ion exchange resin with an exceptionally high selectivity for gold over copper. Presented at the Alta 2012 Gold Conference, 31 May to 1 June 2012, Perth, Australia

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Cu Nanoparticle: Synthesis Chem. Method

2021-5-6 · synthesizing by laser ablation method in biocompatible aqueous solvents for isolation of pure nanoparticles. According to Kim's data, half Minimal Inhibitory concentration (IC50) of gold, silver, and copper in Hela and PC3 cell lines is 66.4 and 82.9 μg/mL, 78.9 and 88.6 μg/mL and 85.5 and

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ASTM D1688 17 Standard Test Methods for Copper

4.2 Copper enters water supplies through the natural process of dissolution of minerals, through industrial effluents, through its use, as copper sulfate, to control biological growth in some reservoirs and distribution systems, and through corrosion of copper alloy water pipes. Industries whose wastewaters may contain significant concentrations of copper include mining, ammunition production

Get Price
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