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Chloride Roasting Complex Gold Ore

Sep 04 2015 The object of investigation is an autoclave cake of the refractory gold containing flotation concentrate prepared using a pilot plant The influence of heat treatment (HT) on the chemical composition and recovery of gold is investigated for this material in a temperature range of 100–500 C Due to the HT it is possible to acquire high recovery of gold up to 98 This is

  • Preg Robbing Of Gold In Chloride Bromide

    Preg Robbing Of Gold In Chloride Bromide

    Gold ore having a total carbon concentration of 0 11 Leaching experiments were carried out both in cyanide and in chloride bromide (halide) media at Outotec Research Center Pori Finland A cyanide leaching test (Test 0) was carried out on a gold ore (Table 1) to determine a preg robbing tendency of gold ore under investigation

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  • Leaching Of An Oxide Gold Ore With Chloride Hypochlorite

    Leaching Of An Oxide Gold Ore With Chloride Hypochlorite

    Jun 01 2007 An oxide gold ore was subjected to chloride hypochlorite leaching at room temperature The effects of three factors including Ca(OCl) 2 vs NaOCl OCl − concentration and HCl concentration on gold leaching performance were investigated Due to formation of CaOCl + complex in solution and hence less reactivity calcium hypochlorite produces a sluggish gold

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  • Acid Method For The Digestion Of Gold Ore Samples

    Acid Method For The Digestion Of Gold Ore Samples

    O Celep I Alp H Deveci and M Vicil Characterization of refractory behaviour of complex gold silver ore by diagnostic leaching Trans Nonferrous Met Soc China 2009 19(3) 707–713 L Lorenzen and V Deventer The identification of refractoriness in gold ores by the selective destruction of minerals Miner

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  • Method Of Processing Sulphide Gold Containing

    Method Of Processing Sulphide Gold Containing

    The procedure consists in preparation of charge out of concentrates or ores with halogenide in charge roast in extraction of gaseous compounds in their condensation in production gold containing ash and in leaching gold out of it Charge is prepared out of concentrate or ore and ammonia chloride and or fluoride at weight ratio 10 0 3 3 0

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  • How To Choose Gold Smelting Flux Superb

    How To Choose Gold Smelting Flux Superb

    Neutral Ores (Basis 25g of Ore sample) In neutral ores a combination of 25g Litharge 20g Sodium Carbonate 1g flour and 8g silica will be appropriate in Smelting 25g of concentrates Of course all of these weight values will have to be adjusted for increasing or decreasing ore weights Black Sand Samples (Basis 20g of Ore sample)

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  • Chlorine Extraction Of Gold

    Chlorine Extraction Of Gold

    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

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  • Gold Chloride Extraction

    Gold Chloride Extraction

    Leaching of an oxide gold ore with chloride Leaching of an oxide gold ore with chloride hypochlorite solutions reaching 67 gold extraction in 4 Goldchloride complex is rather unstable and may re

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  • Extraction Of Gold (au) Involves The Formation Of Complex

    Extraction Of Gold (au) Involves The Formation Of Complex

    Extraction of gold (Au) involves the formation of complex ions X and Y Gold ore → CN H 2 O O 2 Roasting HO + X → Zn Y + Au X and Y respectively are

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  • The Reasons Of Gold Refractory Gold Ore Classification

    The Reasons Of Gold Refractory Gold Ore Classification

    Nov 28 2016 4 Telluride and sulfur salt gold ore In order to dissociate telluride and sulfur salt and make the gold’ recovery easier generally we use hypochlorite chlorination processing roasting and

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  • Recovery Of Silver Gold And Lead From A Complex

    Recovery Of Silver Gold And Lead From A Complex

    Cover gold silver and byproduct lead from a complex lead zinc sulfide ore A ferric chloride (FeCI3 ) preleach at 40 C in 6 h extracted about 50 pct of the zinc and formed insoluble silver and lead chlorides Subsequent acid thiourea leaching for 1 to 3 h at 40 C extracted about 85 pct of the gold and silver Lead chloride was

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  • Gold Ore Processing Volume 15 2nd Edition

    Gold Ore Processing Volume 15 2nd Edition

    Gold Ore Processing Project Development and Operations Second Edition brings together all the technical aspects relevant to modern gold ore processing offering a practical perspective that is vital to the successful and responsible development operation and closure of any gold ore processing operation This completely updated edition features coverage of established newly

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  • Us Patent For Chloride Process For The Leaching Of Gold

    Us Patent For Chloride Process For The Leaching Of Gold

    Apr 08 2013 A process for the extraction of gold from a gold bearing ore or concentrate comprising the steps of leaching the gold bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90 C and an Eh of at least 900 mV After a liquid solids separation step the solution obtained

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  • Process For The Recovery Of Gold From An Ore In Chloride

    Process For The Recovery Of Gold From An Ore In Chloride

    The invention claimed is 1 A cyanide free process for recovery of gold from an ore comprising the steps of i) providing the ore comprising the gold to be recovered ii) leaching the ore in a chloride oxidative medium comprising nitric acid to produce a chloride solution comprising gold and iii) recovering the gold from the chloride solution wherein recovering the gold from the chloride

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  • How To Use Bleach On Gold Ore To Remove Gold Sciencing

    How To Use Bleach On Gold Ore To Remove Gold Sciencing

    Apr 24 2017 Pour the acid and bleach mixture into the plastic bowl with the ore grains and stir Allow four hours for the gold to dissolve stirring every 20 minutes The chlorine reacts with the gold inside the ore to form gold chloride Filter the ore and bleach solution to remove all the impurities such as soil and rock fragments

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  • Development Of Chloride

    Development Of Chloride

    The advantages of chloride leaching using copper(II) or iron(III) as oxidant are fast leaching kinetics and the possibility to process complex raw materials In this dissertation chloride and chloride bromide based processing of free milling gold ore as well as refractory and double refractory gold concentrates was investigated

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  • Leaching Of A Gold Bearing Partially Roasted Sulphide

    Leaching Of A Gold Bearing Partially Roasted Sulphide

    An usual approach for processing complex refractory gold ores is a pre oxidation treatment prior the gold leaching step and the most known options are roasting as a result of the oxidation of chloride ions about 35 of Au was dissolved Additionally 28 of Au is recoverable in 24 h by cyanidation of the residue M Oxygen roasting of

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  • Advances In Gold Ore Processing Google Books

    Advances In Gold Ore Processing Google Books

    Dec 02 2005 The gold processing industry is experiencing change As free milling and oxide ores become depleted complex polymetallic and refractory ores are being processed coupled with increasing pressure for stricter environmental compliance Recent years have also seen a steady reduction in mineral processing and metallurgy graduates and a gradual loss of

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  • Gold Ore Roasting Using Lime

    Gold Ore Roasting Using Lime

    Developments in the processing of refractory complex gold ores e g in whole ore gold roasting plants can reach up to 3 800 t d A glass like ore of silver chloride Gold Extraction Process Development ALS Global performance with global revenues exceeding $1 5 billion ALS continues to remain at

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  • Recovery Of Platinum Palladium And Gold From

    Recovery Of Platinum Palladium And Gold From

    Recovery of platinum palladium and gold from stillwater complex flot ation concentrate by a roasting leaching procedure by e g bdglin 1 j m gomes

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  • Chemical Tests For The Metal Content Of Various Ores

    Chemical Tests For The Metal Content Of Various Ores

    Gold A test known as Darton's is believed to be a valuable means of detecting minute quantities of gold in rocks ore tailings etc Small parts are chipped from all the sides of a mass of rock amounting in all to about ounce This is powdered in a steel mortar and well mixed About half is placed in a capacious test tube and then the tube is partly filled with a solution made by

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  • Roasting Of Gold And Silver Ores : And The Extraction Of

    Roasting Of Gold And Silver Ores : And The Extraction Of

    Roasting of gold and silver ores and the extraction of their respective metals without quicksilver Item Preview remove circle Share or Embed This Item EMBED EMBED (for wordpress com hosted blogs and archive org item description tags) Want Advanced embedding details examples and help! No_Favorite share

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  • Process For Treating Refractory Gold Ores By Roasting

    Process For Treating Refractory Gold Ores By Roasting

    Cupric chloride leaching is an attractive alternative for the treatment of pyritic refractory gold ores In this context the kinetics of pyrite dissolution was studied in cupric chloride

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  • (pdf) Partial Roasting Of Copper Concentrate With

    (pdf) Partial Roasting Of Copper Concentrate With

    Due to a generally complex nature of new ores with increased content of disturbing elements this technology is advancing THE CODELCO ROASTING PLANT AT MMH IN CHILE The roasting plant supplied by Outotec to Codelco at the MMH site close to Calama is presented in the following photos Figures 10 to 12 showing some general views of roaster

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  • The Chemistry Of The Extraction Of Gold Saimm

    The Chemistry Of The Extraction Of Gold Saimm

    Gold(III) to the metal in the presence of the particular ligand It is also ap parent that the requirements for complex stability are different for gold(I) and gold(III) (Finkelstein and Hancock 1974) with less electronegative or 'soft' donor atoms

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  • Gold: Occurrence Principles Of Extraction Properties And

    Gold: Occurrence Principles Of Extraction Properties And

    The gold ore is crushed and powdered Roasting The concentrated ore is roasted in excess of air or oxygen when impurities of sulphur arsenic and tellurium are oxidised and escape as their volatile oxides iii) Treatment with KCN gold dissolves in KCN to form a soluble complex called potassium aurocyanide

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  • Extraction Of Nickel From Garnierite Laterite Ore Using

    Extraction Of Nickel From Garnierite Laterite Ore Using

    Extraction of Nickel from Garnierite Laterite Ore Using Roasting and Magnetic Separation with Calcium Chloride and Iron Concentrate Junhui Xiao 1 2 3 Wei Ding 1 3 Yang Peng 1 3 Tao Chen 1 3 Kai Zou 1 3 and Zhen Wang 1 3 1 Sichuan Engineering Lab of Non Metallic Mineral Powder Modification and High Value Utilization

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  • Efficient Synchronous Extraction Of Nickel Copper And

    Efficient Synchronous Extraction Of Nickel Copper And

    Jun 18 2020 Improving gold recovery from a refractory ore via Na 2 SO 4 assisted roasting and alkaline Na 2 S leaching Hydrometallurgy 185 133–141 (2019) CAS Article Google Scholar

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  • Volatilization Of Gold

    Volatilization Of Gold

    193 It has been stated by some authors that there is never much loss of gold in roasting ores unless the roasting is performed too rapidly and that the addition of salt makes no difference in this respect I differ with them on this point even when the statement is supported by so formidable a name as that of Plattner

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  • Extracting Gold Howstuffworks

    Extracting Gold Howstuffworks

    Removing the gold bearing rock from the ground is just the first step To isolate pure gold mining companies use a complex extraction process The first step in this process is breaking down large chunks of rock into smaller pieces At a mill large machines known as crushers reduce the ore to pieces no larger than road gravel

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  • Zinc Processing Ores Britannica

    Zinc Processing Ores Britannica

    Zinc processing Zinc processing Ores Zinc ores are widely distributed throughout the world although than 40 percent of the world’s output originates in North America and Australia The common zinc containing minerals are the zinc sulfide known as zinc blende or sphalerite (ZnS) a ferrous form of zinc blende known as marmatite [(ZnFe)S] and a zinc carbonate

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