chlorination of refractory ore

chlorination in processing gold ore
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both of bromine ion and chlorine ion in the gold leaching process prior to cyanidation to treat refractory gold ores chemical chlorine chlorine extraction of gold Know More Gold Ore Chlorination - Mineral Processing Mar 16 2016 Experience has shown how difficult it is to obtain information 1982 Chlorine extraction of gold...

chlorination gold revery
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The C6X Series Jaw Crushers is mainly used in many different industrial fields such as metallurgy nonmetal ores chemical cement construction refractory material and ceramics etc Learn more How to Leach Gold Ore With Chlorination Sciencing...

Novel Technology for Chlorination of Niobium and
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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...

gold leaching with chlorine plant
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Chlorination Leaching of Refractory Ores Hydrometallurgy Direct leaching of ores becomes very expensive using chlorine systems I have tested leaching of gold in worked out mining areas using thiourea in an acid environment results leaching and absorption onto carbon was remarkable The problem however was the environmental issues associated...

The reasons of gold refractory Gold ore classification
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Classification of refractory or If silver is the main economical mental we can try to use medium preprocessing method such as chlorination of ore or concentrate ore soda leaching and...

Determination of the mechanism of the chlorination of gold
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Roasting and chlorine leaching of gold-bearing refractory concentrate Experimental and process analysis International Journal of Mining Science and Technology 2013 23 5 709-715...

The recovery of gold from refractory ores by the use of
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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 leach CICL The objective of this research was to demonstrate the basic feasibility of CICL technology...

Pretreatment Process on Refractory Gold Ores with As
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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...

Methods of Processing of the Gold
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method for processing the refractory sulfide ore is the method of hydro-chlorination along with thiocar-bamide As a method of processing the gold-containing tailings of the refractory sulfide concentrates we chose the method of electrochemical oxidation of sulfides in the ore pulp with the use of various chlo-...

Determination of the mechanism of the chlorination of gold
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May 01 2002 0183 32 Roasting and chlorine leaching of gold-bearing refractory concentrate Experimental and process analysis International Journal of Mining Science and Technology 2013 23 5 709-715 DOI 101016/jijmst201308015 Mehdi Ghobeiti Hasab Fereshteh Rashchi Shahram Raygan...

Gold extraction by chlorination using a pyrometallurgical
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The chlorination equipment used in the laboratory has a simple design and permits a safer use of chlorine gas References Deng H Li X 1987 Chloride roasting of a complex gold ore and treatment of chlorine fume for precious-metal recovery-experimental results Transactions Institution of Mining and Metallurgy C Mineral Processing Extractive...

Pressure chlorination of refractory gold ores
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The treatment of an aqueous slurry of refractory gold ore with chlorine at an elevated pressure invariably results in a pH decrease of the slurry The inventors have found that at pH levels below about 35 the effectiveness of the chlorination pretreatment declin The pH of the slurry should therefore be maintained above 35...

US5074910A
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The present invention is a process to recover precious metals from sulfide or It involves chlorinating a mixture of an ore concentrate and salt to form a liquid melt The salt preferably contains potassium chloride This chlorination is carried out at a temperature between 300 176 and 600 176 C while stirring The process converts precious metals in the elemental and sulfide forms into...

Research on chlorination leaching of pressure
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Jun 01 2020 0183 32 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 427 when directly chlorination-leached...

PAPER OPEN ACCESS Biooxidation pretreatment of low
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Hence this refractory gold ore in its processing requires pretreatment methods before cyanidation Some conventional pretreatment methods such as the pre-aeration method by chlorination roasting pressure oxidation ultrafine grinding and flotation-intensive leaching are...

Kinetics of leaching refractory gold ores by ultrasonic
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The resources of refractory gold ores are abundant and their effective treatment can bring good economic benefits This paper investigated the kinetics of leaching gold from refractory gold ores by ultrasonic-assisted electro-chlorination The effects of ultrasound time ratio initial hydrochloric acid concentration and leaching temperature on the kinetic parameters were discussed...

Refractory Gold Mining SGS
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The use of chlorine deactivates the carbonaceous matter under strongly oxidizing conditions However the consumption and cost of chlorine are prohibitive for many ores Blinding and deactivation of the carbonaceous minerals with an organic compound such as kerosene is a cheaper alternative to chlorine and has been tested with many or...

CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF
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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 gold...

chlorination in processing gold ore
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Nos 4 552 589 and 4 738 718 disclose processes in which refractory gold ores are subjected to elevated oxygen pressures in autoclavThe levels of organic and sulfidic components of the gold ore will obviously impact the chlorine requirements and the costs associated with the chlorination...

To Leach Gold Ore With Chlorination
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Us5236676a - Pressure Chlorination Of Refractory Gold A method and apparatus are described for recovering gold from aqueous slurries of refractory gold ores containing sulfidic andor carbonaceous matter The method entails pretreating an ore slurry with chlorine in a multi-compartment autoclave operated at an elevated pressure Details...

Process for recovering precious metals from sulfide ores
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The present invention is a process to recover precious metals from sulfide or It involves chlorinating a mixture of an ore concentrate and salt to form a liquid melt The salt preferably contains potassium chloride This chlorination is carried out at a temperature between 300degree and 600degree C while stirring The process converts precious metals in the elemental and sulfide forms...

Developments in the pretreatment of refractory gold
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Developments in the pretreatment of refractory gold minerals by nitric acid D-X LI College of Environmental Science and Engineering China The paper covers many literature reports of processes using nitrogenous species as an oxidant for processing refractory gold ores especially development in the pretreatment of refractory gold...

Chlorination Leaching of Refractory Ores
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The chlorination of ferroniobium and device for its
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The chlorination process is carried out at a temperature of 1100-1200 o When the flow rate of chlorine is 1 17 to 19 kg/kg chlorine Consumption was regulated according to the testimony of a differential pressure gauge installed on echodrone in the lower part of chlarotera and enters the chamber of defloriani 5 provided with a nozzle...

Gold Oreprocessing Chlorination In Alamo
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Refractory Gold Ore Processing Using Chlorine Abstract 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...

Roasting and chlorine leaching of gold
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Abstract This paper deals with gold extraction from a refractory concentrate by chlorine leaching The process considers a pre-treatment of refractory materials by low temperature oxidation carried out with low oxygen concentration The oxidized material is treated by leaching with brine After gold adsorption/reduction onto activated carbon iron and base metals can be precipitated by NaOH...

ECONOMICS OF REFRACTORY GOLD ORE PROCESSES
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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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