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extraction of gold by chlorination

extraction of gold by chlorination

Gold extraction by chlorination using a pyrometallurgical , The feasibility to recover the gold present in alluvial material, by means of a chlorination process, using chlorine as a reactive agent, has been studied Get More Info; Process Materials Barrick Gold Corporation

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gold extraction by chlorination using a pyrometallurgical

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

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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 soluble in water and removed by washing, the gold being then precipitated by ferrous sulphate, sulphur dioxide, hydrogen sulphide, or

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us4353740a - chlorine extraction of gold - google patents

The process includes roasting the ore to remove sulfides as sulfur dioxide followed by chlorination of the ore at a temperature of about 350° C. in the presence of iron to form a mixture of

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(pdf) gold extraction from pyrite cinders by high

Dunn (1982) and Dunn et al. (1991) have extracted gold by chlorination using pyrometallurgical processes at temperatures lower than the ones mentioned above, from refractory minerals and alloys

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simultaneous extraction of gold and zinc from refractory

2020-4-1 · OJEDA et al investigated the feasibility of the extraction of gold from alluvial material by means of chlorination process, using chlorine as a reactive agent. And the highest recovery of

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extraction of gold

As a preliminary step the material is submitted to an oxidizing and chlorinating roasting, to convert metals other than gold into chlorides. 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

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synergistic extraction of gold from the refractory gold

2017-7-1 · 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 ore were investigated

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chlorine extraction of gold - dunn; wendell e

A process for treating a particulated gold bearing ore to recover the gold therein is disclosed. The process includes roasting the ore to remove sulfides as sulfur dioxide followed by chlorination of the ore at a temperature of about 350° C. in the presence of iron to form a mixture of volatile gold chlorides and volatile gold-iron chlorides in the chlorine off gases followed by condensing

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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

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