chlorination of refractory ore

how to leach gold ore with chlorination keuken310nlchlorination of refractory ore business skillscoza

The Leaching and Recovery of Au from Scrap of PCBs It is confirmed that the leaching agent chlorine hypochlorite Leaching of an oxide gold ore More Products The Recovery of Gold from Refractory Ores by the gt gt Chat Online how to leach gold ore with chlorination SciencingPressure chlorination of refractory gold ores The amount of slurry to be recirculated depends on the refractory nature of the ore ie the more refractory the ore the more recirculation may be employed to accommodate the liquid chlorine requirements of the chlorination step

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How to Leach Gold Ore With Chlorination Sciencingextraction of gold by chlorination africar hirecoza

Apr 25 32 Grind the ore so that all parts of the ore are open to the HCL mixture Add your ore to a plastic tub cement mixer along with 10 pounds of river rock and turn the mixer until the ore is 200 mesh or more 200 mesh means there are at least 200 particles in one square inch of ore Remove the river rock which will still be largemation of chlorine gas pH < 35 the optimum leaching parameters were extracting gold from the refractory ores long leaching times more than 24 hours The NewberyVautin chlorination process is a process to extract gold from its ore using chlorination developed by James Cosmo Newbery and

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The Role of Sulfide Minerals and Carbon in The Gold extraction by chlorination using a pyrometallurgical

To test the hypothesis samples of several sulfide minerals were subjected to reaction with sparged chlorine gas to determine which if any dissolve faster than gold under these conditions Then a synthetic carbonaceous refractory gold ore containing pyrite chalcocite activated carbon and gold was subjected to gas spargingGold ores Pyrometallurgy Extractive metallurgy abstract 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 The inﬂuence of temperature and reaction time

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gold ore refractory socialmediapmnlGold extraction Wikipedia

Refractory Gold Mining SGS Also grinding the ore to an extremely fine particle size can liberate gold encapulsated in sulfid SGS has very extensive experience with all the unit operations involved in the processing of refractory gold ores and in selecting the optimum flowsheet for a particular oreA refractory gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals These ores are naturally resistant to recovery by standard cyanidation and carbon adsorption process These refractory ores require pre treatment in order for cyanidation to be effective in recovery of the gold

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CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF USA Pressure chlorination of refractory gold ores

of the chloride/chlorine lies in the handling Thus it is important to select an effective substitute for chlorine For extraction of gold from the refractory ores in which gold is surrounded by sul fide minerals oxidative pretreatment of the ore is essential to oxidize the sulfides and expose goldA 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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Gold extraction by chlorination using a pyrometallurgical Gold Ore Processing ScienceDirect

Gold ores Pyrometallurgy Extractive metallurgy abstract 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 The inﬂuence of temperature and reaction time The gold mining industry is presented as an overview covering key aspects and examples regarding gold discovery deposits and production Segmentation of gold ore types is made based on major processing routes ie free milling refractory heap leachable and concentrate sal

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Titania Tetrachloride Reactor Chlorinator Plants The recovery of gold from refractory ores by the use of

Titania Tetrachloride Reactor Chlorinator Plants Titanium ore in the presence of carbon and chlorine gas will produce titania tetrachloride TiCl 4 in refractory lined reactors Further refinements convert titania tetrachloride into titanium dioxide TiO 2 a white pigment used for paintsAbstract Recently the US 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

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Novel Technology for Chlorination of Niobium and Tantalum ECONOMICS OF REFRACTORY GOLD ORE PROCESSES

Direct chlorination of refractory metal oxides Nb2O5 and Ta2O5 to their pentachlorides is thermodynamically unfavorable and takes place only in the presence of a reducing agent binding the released oxygen The process is usually carried out in the presence of different forms of Chlorination of low grade niobium ore concentrate with SiCl 4 A number of processes have been applied to the treatment of refractory ores and concentrat These include Alkaline air oxidation Chlorination Chlorination and alkaline air oxidation tend to be the lowest capital cost pretreatment methods and in cases of ores with very low sulfide content they also can have very low operating costs

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Chlorination Leaching of Refractory Ores Hydrometallurgy Gold Ore Chloridizing Distillation Precious Metal

Chlorination leaching of floatation concentrate could be a route for treatment of refractory ores instead of roasting BIOB or POX some companies are also testing fine grinding and oxygen injection using shear reactors in alkaline cyanide systems Direct leaching of ores becomes very expensive using chlorine systemsChlorine distillation method is mainly used to treat refractory gold ore Refractory gold ore refers to those ore has leaching rate less than 80 by standard cyanide leaching even for 20 30 hours The reason why it is difficult to leach includes 1

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How to Leach Gold Ore With Chlorination SciencingRefractory Gold Mining SGS

Apr 25 32 Grind the ore so that all parts of the ore are open to the HCL mixture Add your ore to a plastic tub cement mixer along with 10 pounds of river rock and turn the mixer until the ore is 200 mesh or more 200 mesh means there are at least 200 particles in one square inch of ore Remove the river rock which will still be largeAlso grinding the ore to an extremely fine particle size can liberate gold encapulsated in sulfid SGS has very extensive experience with all the unit operations involved in the processing of refractory gold ores and in selecting the optimum flowsheet for a particular ore Our gold metallurgy expertise is second to none Chemical interference

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Pretreatment Process on Refractory Gold Ores with AsUSA Treatment of refractory carbonaceous sulfide

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 GuizhouRefractory carbonaceous sulfide ores are treated in a manner so as to improve gold recovery by a treatment in specific combination of steps whereby the ore is treated with chlorine after pretreatment and before cyanidation the particular steps in the treatment of the ore have been found to be necessary as the conventional pretreatment will not improve the yields on any economic basis

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The reasons of gold refractory Gold ore classification gold extraction chlorination using pyrometallurgical process

Nov 28 32 The reason of the gold mineral refractory There are so many types of reasons that caused the difficulty of gold ore processing including physical element chemical element and mineralogical elementsubstitute for chlorine For extraction of gold from the refractory ores in which gold is surrounded by sul fide minerals oxidative pretreatment of the ore is essential to oxidize the sulfides and expose gold Pyrometallurgical oxidation by roasting is encountered with environmen tal limitations thus hydrometallurgical methods are preferred

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