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Gold extraction by chlorination using a pyrometallurgical ...

2009-3-1  Dunn, 1982, Dunn et al., 1991 have extracted gold by chlorination using pyrometallurgical processes at temperatures lower than the ones mentioned above, from

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Gold extraction by chlorination using a pyrometallurgical ...

Request PDF Gold extraction by chlorination using a pyrometallurgical process The feasibility to recover the gold present in alluvial material, by means of a

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The Extraction of Gold by Amalgamation and Chlorination

2019-10-31  The Extraction of Gold by Amalgamation and Chlorination By RALPH W. BIRRELL University of Melbourne he gold ores found above the waterline in the Lachlan Fold

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Gold extraction by chlorination using a pyrometallurgical ...

2009-12-3  Technical Note Gold extraction by chlorination using a pyrometallurgical process M.W. Ojedaa,*, E. Perinob, M. del C. Ruiza a Instituto de Investigaciones en

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Gold Chlorination Processes Methods

2016-8-31  Chlorination Process for Gold. This process was based on the fact that chlorine, in the presence of moisture, converts gold into the trichloride AuCl3 , which is

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Chlorine extraction of gold - DUNN; WENDELL E.

Chlorine extraction of gold. United States Patent 4353740. Abstract: A process for treating a particulated gold bearing ore to recover the gold therein is

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(PDF) Gold extraction from pyrite cinders by high ...

Abstract. This study investigated of the extraction of gold from pyrite cinders by means of chlorination at high temperature using calcium chloride as the

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Extraction of Gold

After chlorination of the gold, preferably with chlorine under pressure, the metal is precipitated by hydrogen sulphide or ferrous sulphate, or the gold is

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Simultaneous extraction of gold and zinc from refractory ...

2020-4-1  Trans. Nonferrous Met. Soc. China 30(2020) 1111−1123 Simultaneous extraction of gold and zinc from refractory carbonaceous gold ore by chlorination roasting

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The recovery of gold from refractory ores by the use of ...

Recently, the U.S. Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores, comparing various treatment methods in

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Gold extraction by chlorination using a pyrometallurgical ...

Request PDF Gold extraction by chlorination using a pyrometallurgical process The feasibility to recover the gold present in alluvial material, by means of a chlorination process, using ...

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Gold extraction by chlorination using a pyrometallurgical ...

2009-12-3  Technical Note Gold extraction by chlorination using a pyrometallurgical process M.W. Ojedaa,*, E. Perinob, M. del C. Ruiza a Instituto de Investigaciones en Tecnología Química (INTEQUI), Universidad Nacional de San Luis-CONICET, C.C. 290, 5700 San Luis, Argentina bÁrea de Química Analítica, Universidad Nacional de San Luis, San Luis, Argentina ...

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(PDF) Gold extraction from pyrite cinders by high ...

Abstract. This study investigated of the extraction of gold from pyrite cinders by means of chlorination at high temperature using calcium chloride as the chlorinating agent. - The most favorable ...

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The Chlorination of Gold Ores. - Digitised Collections

2020-2-20  The Chlorination of Gold Ores. By Mr. Donald Clark, M.M.E., B.C.E. The ideal method for extracting fine gold would be to dis-solve out the gold with some solvent which would not attack other minerals present. The solvents known 6o years ago were

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Extraction of Gold

After chlorination of the gold, preferably with chlorine under pressure, the metal is precipitated by hydrogen sulphide or ferrous sulphate, or the gold is precipitated by filtration through charcoal, and recovered by combustion of the charcoal. ... The extraction of gold by the cyanide-method is of great technical importance. It is effected by ...

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Synergistic extraction of gold from the refractory gold ...

A synergistic extraction method for gold from the refractory gold ores via ultrasound and chlorination-oxidation was developed. The effects of solid-liquid ratio, extraction time, ultrasound power, NaClO concentration and NaOH concentration on the extraction rate of gold from the refractory gold

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Effect of Silver on Chlorination Bromination of Gold

2017-2-11  In order to obtain a satisfactory extraction of gold by chlorination or bromination, it is essential to have an excess of reagent over that taken up by the ore. In working on a large scale, it has been found that the consumption of chemicals per ton of ore is the larger, the smaller the charge.

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The recovery of gold from refractory ores by the use of ...

Recently, the U.S. Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores, comparing various treatment methods in which a ground ore pulp is contacted with chlorine gas and activated carbon is added to the pulp for a carbon-in-chlorine leach (CICL). The objective of this research was to demonstrate the basic feasibility of CICL ...

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Gold Leaching from a Refractory Gold Concentrate by the ...

In this research, NaCl — NaClO solution is used to leaching gold from a refractory gold concentrate, and the influence of NaCl and NaClO concentration, reaction time to the leaching rate were investigated in this experiment. The raw materials and the leaching residue were characterized by a series of analysis methods such as XRD, XRF, SEM and ...

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Download [PDF] The Chemistry Of Gold Extraction Free ...

The Chemistry of Gold Extraction bridges the gap between research and industry by emphasizing the practical applications of chemical principles and techniques. ... and kinetic considerations. The leaching of gold is discussed with respect to cyanidation, chlorination, and other leaching processes. The recovery of gold from solution is examined ...

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How to Leach Gold Ore With Chlorination Sciencing

2017-4-25  Gold can be leached from stone through alkaline or acidic-based products, including halogens, such as chlorine, iodine and bromine. Halogens are reactive, non-metal elements with seven electrons in their outer shell which allow them to easily

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Synergistic extraction of gold from the refractory gold ...

A synergistic extraction method for gold from the refractory gold ores via ultrasound and chlorination-oxidation was developed. The effects of solid-liquid ratio, extraction time, ultrasound power, NaClO concentration and NaOH concentration on the extraction rate of gold from the refractory gold

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The recovery of gold from refractory ores by the use of ...

Recently, the U.S. Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores, comparing various treatment methods in which a ground ore pulp is contacted with chlorine gas and activated carbon is added to the pulp for a carbon-in-chlorine leach (CICL). The objective of this research was to demonstrate the basic feasibility of CICL ...

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Extraction of platinum and gold from copper anode

2020-8-24  Gold and platinum, as precious metals, have a low chemical activity and show a high ability of resistance to dissolution. Traditionally, a chlorination leaching method is directly used to extract Pt and Au from copper anode slimes, in which the Pt and Au are chlorinated and transferred to acidsoluble PtCl 6

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Preliminary Study on Comprehensive Recovery of Gold ...

Chlorination was used to extract gold, silver, copper, lead and zinc from gold concentrate. Parameters of J3 leaching agent (the patented reagents of the research group) concentration, acidity, NaCl concentration, leaching temperature were optimised. The extraction of gold, silver, copper, lead and zinc were 96.85%, 73.84%, 90.63%, 93.8% and 48 ...

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Method of recovering gold powder - Nippon Mining

1997-5-23  A gold bearing chlorination leach solution 9 Liters was subjected to one-stage solvent extraction with DBC (aqueous to organic phase ratio=25:1) over 10 min; the resulting gold bearing organic phase was scrubbed through five stages in a continuous countercurrent fashion using hydrochloric acid (aqueous to organic phase ratio=1:1); thereafter ...

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EFFECT OF OXIDIZING AGENTS IN EXTRACTING GOLD

Extracting the gold from anode slime had been attempted in the laboratory by applying wet chlorination method. Sodium hypochlorite (NaOCl) and hydrogen peroxide (H2O2) served as the oxidizing agents. Effects of various parameters such as solvent concentration, leaching time and temperature on the percent extraction of gold were studied.

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金矿非氰化浸金研究进展 - USTB

2020-11-15  Wang H J, Feng Y L, Li H R, et al. Simultaneous extraction of gold and zinc from refractory carbonaceous gold ore by chlorination roasting process. Trans Nonferrous Met Soc China, 2020, 30(4): 1111 doi: 10.1016/S1003-6326(20)65282-7 [6] Yang T Z, Rao S

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Download [PDF] The Chemistry Of Gold Extraction Free ...

The Chemistry of Gold Extraction bridges the gap between research and industry by emphasizing the practical applications of chemical principles and techniques. ... and kinetic considerations. The leaching of gold is discussed with respect to cyanidation, chlorination, and other leaching processes. The recovery of gold from solution is examined ...

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Gold recovery from refractory gold concentrates by ...

2019-3-1  and could improve gold extraction of flotation concentrate treated by oxidative roasting (Xu et al., 2015). Pressure oxidation for the treatment of refractory gold concentrates has been deployed in some countries. Shuiyindong gold deposit is one of the Carlin-type deposits which is a typical

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