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chlorination of refractory ore

US5236676A Pressure chlorination of refractory gold ores

A method and apparatus are described for recovering gold from aqueous slurries of refractory gold ores containing sulfidic and/or carbonaceous matter. The method entails pretreating an ore slurry with chlorine in a multi-compartment autoclave operated at an elevated pressure. The chlorine used in this pressure chlorination pretreatment can be in either the gaseous or liquid state.

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The recovery of gold from refractory ores by the use of

01/09/1990· 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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Pressure chlorination of refractory gold ores Freeport

17/08/1993· The slurry of refractory gold ore to be treated with chlorine in the method of this invention is prepared by slurrying ground ore with water. The ore should be ground to about 100% -70 Tyler mesh, and preferably 100% -100 Tyler mesh. Conventional dry grinding or wet grinding circuits may be utilized to achieve the desired ore grind. The solids content of the ore slurry should be 30% to 55%, and

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Research on chlorination leaching of pressure-oxidized

01/06/2020· The main ores of the concentrate are pyrite (FeS2) and arsenopyrite (FeAsS), where gold disseminated in the fine or ultrafine natural gold state. This concentrate is a typical refractory ore, and its gold percent leached is 42.7% when directly chlorination-leached. To reduce the consumption of the oxidant and improve the leaching reactivity during the chlorination leaching, it pretreated the gold

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US Patent for Pressure chlorination of refractory gold

A method and apparatus are described for recovering gold from aqueous slurries of refractory gold ores containing sulfidic and/or carbonaceous matter. The method entails pretreating an ore slurry with chlorine in a multi-compartment autoclave operated at an elevated pressure. The chlorine used in this pressure chlorination pretreatment can be in either the gaseous or liquid state.

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Review Pretreatment Process on Refractory Gold Ores with As

Wet chlorination uses chlorine (or chlorine oxidant) to dispose of Arsenic-bearing refract-tory gold ore. It is an effective method for the carbon refractory gold ore and is used in preprocess of high arsenic gold ore. Beijing General Research Institute of Mining and Metallurgy has studied a refractory gold ore bearing high arsenic in Guizhou. It used

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chlorination in processing gold ore Split P

chlorination in processing gold ore msastellenbosch co za. Gold Refining Gold mines process ore using various techniques to produce an alloy composed primarily of gold and silver which is called a dore bar The composition of dore can vary significantly between mines but generally the gold dore bars the Perth Mint processes are composed of between 70-80 gold and 10-15 silver . Read More. The

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Refractory Gold Ore Treatment Methods

Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and

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gold refractory,ore classification,preprocessing methods

The most of refractory ore is gold bearing sulfide. Sulfide iron ore includes many kinds of pyrite and arsenopyrite. Ore and sulfide ore are symbiotic closely under submicron particle, we should make the sulfide oxidation by using roasting, pressurized oxidation, bacterial oxidation, chlorination oxidation. Compared with coarse pyrite crystals and arsenical pyrite, mildew globular pyrite is more suitable for

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Chlorination Leaching of Refractory Ores

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Hydrometallurgy. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else

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Carbon-in-Chlorine Treatment of Refractory Gold Ores

Chlorination in the treatment of refractory gold ores is applicable in many low-grade gold operations. When usable, this treatment provides an economic means of consuming sulfides and deactivating disseminated organic carbon. Chlorination, however, is a pretreatment technique that requires the neutralization of the chlorine prior to leaching the ore with cyanide. Research by the Bureau has

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US Patent for Pressure chlorination of refractory gold

A method and apparatus are described for recovering gold from aqueous slurries of refractory gold ores containing sulfidic and/or carbonaceous matter. The method entails pretreating an ore slurry with chlorine in a multi-compartment autoclave operated at an elevated pressure. The chlorine used in this pressure chlorination pretreatment can be in either the gaseous or liquid state.

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NIOSHTIC-2 Publications Search 10007514 Refractory

Refractory Ore Gold Recovery by Carbon-in-chlorine Leach. Authors Greaves-JN; Palmer-GR; White-WW III Source An investigation undertaken by the Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores. Comparisons were made between various treatment methods in which a pulped ore is contacted with chlorine gas and activated carbon is added

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NIOSHTIC-2 Publications Search 10010831 Carbon-in

Chlorination in the treatment of refractory gold ores is applicable in many low-grade gold operations. When usable, this treatment provides an economic means of consuming sulfides and deactivating disseminated organic carbon. Chlorination, however, is a pretreatment technique that requires the neutralization of the chlorine prior to leaching the ore with cyanide. Research by the Bureau has

More

Pretreatment Process on Refractory Gold Ores with As

Wet chlorination uses chlorine (or chlorine oxidant) to dispose of Arsenic-bearing refract-tory gold ore. It is an effective method for the carbon refractory gold ore and is used in preprocess of high arsenic gold ore. Beijing General Research Institute of Mining and Metallurgy has studied a refractory gold ore bearing high arsenic in Guizhou. It used water chlorination to leach gold and gold

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gold ore processing chlorination

chlorination-leach) 6 Refractory ore processing 7 Alternative lixiviants Amalgamation This is an ancient process which involves the alloying of the gold particles with metallic mercury to form amalgam and then the separation of the gold from the mercury by heating in retorts until the mercury is distilled off . The direct chlorination of a pure gold was also studied up to a temperature of 1223

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gold refractory,ore classification,preprocessing methods

The most of refractory ore is gold bearing sulfide. Sulfide iron ore includes many kinds of pyrite and arsenopyrite. Ore and sulfide ore are symbiotic closely under submicron particle, we should make the sulfide oxidation by using roasting, pressurized oxidation, bacterial oxidation, chlorination oxidation. Compared with coarse pyrite crystals and arsenical pyrite, mildew globular pyrite is

More

chlorination in processing gold ore Split P

chlorination in processing gold ore msastellenbosch co za. Gold Refining Gold mines process ore using various techniques to produce an alloy composed primarily of gold and silver which is called a dore bar The composition of dore can vary significantly between mines but generally the gold dore bars the Perth Mint processes are composed of between 70-80 gold and 10-15 silver . Read More. The

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ECONOMICS OF REFRACTORY GOLD ORE PROCESSES

Refractory gold ore pretreatment processes continue to receive much attention. This paper compares the relative economics of treating ores by oxygen pressure oxidation, roasting and bacterial oxidation with or without preconcentration by froth flotation. Capital and operating cost estimates for each method of pretreatment were prepared and these estimated costs and ore sulfide grades then are

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