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The thiosulphate process will enable Barrick to contribute an average of 350 to 450 thousand ounces of gold each year to their operation allowing the large plant to keep operating preserving
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An improved thiosulphate leach process for the recovery of gold from ores and other gold bearing materials characterised in that the leach solution comprises thiosulphate thiourea or a reagent chemically related thereto and an oxidant that does not oxidise thiosulphate the process producing a pregnant leach solution from which gold may be recovered
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This process results in recoveries that are close to those generated by cyanide leaching in many cases In recovery operations that are affected by preg robbing ores it can yield substantially better recovery than cyanide Thiosulfate leaching is particularly well suited to state of the art resin in pulp RIP gold recovery technologies
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The chemistry involved in the thiosulphate leaching process is more complex and less robust than the cyanide leaching process and is therefore more difficult to optimize and more sensitive to operate The leach process involves a chemical reaction between metallic gold and the thiosulphate anion with oxygen as the
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thiosulphate leaching process hong kong As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any size reduction requirements including quarry aggregate and different kinds of minerals We can provide you the complete stone crushing and beneficiation also supply
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Semantic Scholar extracted view of Oxidative pre treatment in thiosulphate leaching of sulphide gold ores by D Feng et al Skip to search form Skip to main content Skip to account menu Semantic Scholar s Logo Search 206 463 155 papers from all fields of science Search
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In addition the features and flowsheet of the first and unique commercial/industrial application of thiosulphate leaching process resin in leach ion exchange electro winning developed by
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This process results in recoveries that are close to those generated by cyanide leaching in many cases In recovery operations that are affected by preg robbing ores it can yield substantially better recovery than cyanide Thiosulfate leaching is particularly well suited to state of the art resin in pulp RIP gold recovery technologies
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The presence of ferric ions in the bulk thiosulphate solution catalyzes the electrochemical reactions to facilitate the oxidation of metallic gold to aurous Au and silver to argentous Ag ions for Au° to Au Effect of Thiourea Concentration Maintaining the appropriate dosage of thiourea in gold leaching is of prime importance
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Oenothera fruticosa L Youngii Lapsley and Stokesia laevis L Hér Klaus Jelitto are two hardy herbaceous perennials with great potential as pot crops The vernalization and photoperiod requirements were examined for each species
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Thiosulfate LeachingThiosulfate leaching is an alkaline process which removes gold from carbonaceous ores instead of using cyanide It is less destructive and toxic and has a higher efficiency with preg robbing ores as a leaching agent The major chemical components of thiosulfate are common fertilisers which include ammonium thiosulphate and
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Thiosulphate leaching is an alkaline process usually operated in the pH 8 to 10 range so there are no concerns with corrosion of equipment in the recovery operation The main chemical components of the thiosulphate leaching process ammonium thiosulphate and ammonium sulphate are common fertilizers
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By necessity all form strong complexes with gold enabling gold to be leached in a practical Eh range Thiosulphate provides the strongest alternative complex although this does not compare closely to cyanide Thiosulphate Gold Leaching Process Comparison of Cyanide and Thiosulphate Leaching for Gold Production
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While thiosulfate is a potential option you do need to look at the mineralogy of the deposit It widely known that cyanide does not always work and some other process must be used This may include pretreatment to make the ore leachable So always look at the ore and its characteristics do not just assume that one process or another will work
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Thiosulphate Leach Process Free download as PDF File pdf Text File txt or read online for free
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Feb 13 2021Sodium Thiosulphate An Overview Sodium thiosulphate sodium thiosulfate is an inorganic chemical compound described with the formula Na 2 S 2 O is mostly found in the pentahydrate form hence referred with the chemical formula Na 2 S 2 O 2 O It is an industrial compound which has long been used in a wide range of medical applications especially as an intravenous medication for
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consumed during the leaching of gold in the above scheme Thiosulphate is thermodynamically unstable in water and is partially oxidized during leaching to form polythionates such as tetrathionate and trithionate as well as sulphate The order of increasing oxidation state is S 2 O 3 2 < S 4 O 6 2 < S 3 O 6 2 < SO 4 2
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leaching experiments were conducted at 25 oC and the leaching time was 6 hours Figures 1 and 2 show the changes in Ag and Cu leaching recovery during the leaching process at various thiosulphate concentrations Fig 1 Effect of thiosulfate ions concentration on Ag recovery s/l = 1 10 initial NH 3 concentration mol/dm3 temperature 25 oC
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In this study precipitation of metals from thiosulphate leach solutions using sodium sulphide Na2S was investigated A pregnant leach solution PLS derived from thiosulphate leaching M
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The thiosulfate leaching of gold was controlled by the chemical leaching mechanism • The quadratic mathematical model for the rate of gold leaching has been observed • The rate of gold leaching was optimized using response surface methodology • The optimal conditions were applied for kinetic model of gold leaching process 1 Introduction
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Thiosulphate leaching of silver from an arsenical refractory ore Article ID Journal Published Year Pages File Type 6672367 Minerals Engineering 2024 11 Pages PDF Abstract Keywords Refractory ore Silver recovery Thiosulphate Ultrafine grinding Silver Related Topics
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Nov 13 2024 #6 Wyndham If you roast the sand then grind the sand in a ball mill or rod mill with citric acid it gets rid of iron and sulfides Rinse the sand well with water and you are good to go It is always a good idea to eliminate all the junk you can before leaching Reply
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Thiosulfate leaching can be considered a non toxic process the gold dissolution rates can be faster than conventional cyanidation and due to the decreased interference of foreign cations high gold recoveries can be obtained from the thiosulfate leaching of complex and carbonaceous type ores In addition thiosulfate can be cheaper than cyanide
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Biooxidation‒thiosulfate leaching of refractory gold concentrate He fei Zhao 1 2 Hong ying Yang 1 2 Lin lin Tong 1 2 Qin Zhang 1 2 and Ye Kong 1 2 Author
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The study provides optimization data on the work carried out on the Knelson Concentrator KC XD 20 at the High Pressure Leach HPL plant at Kansanshi Mining PLC KMP Zambia ICTIME 2024 Hong Kong September 18 2024 A study on physical beneficiation of platinum group metals PGMs flotation tailings was carried out by means of spiral
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This process results in recoveries that are close to those generated by cyanide leaching in many cases In recovery operations that are affected by preg robbing ores it can yield substantially better recovery than cyanide Thiosulfate leaching is particularly well suited to state of the art resin in pulp RIP gold recovery technologies
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Thiosulfate leaching is a process that recovers gold from ore without the use of cyanide SGS developed the thiosulfate leaching process because in some jurisdictions increased regulation pressure means that cyanide cannot be used or transported We are a global technical leader in the field of thiosulfate leaching
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This process results in recoveries that are close to those generated by cyanide leaching in many cases In recovery operations that are affected by preg robbing ores it can yield substantially better recovery than cyanide Thiosulfate leaching is particularly well suited to state of the art resin in pulp RIP gold recovery technologies
Get Price
This process results in recoveries that are close to those generated by cyanide leaching in many cases In recovery operations that are affected by preg robbing ores it can yield substantially better recovery than cyanide Thiosulfate leaching is particularly well suited to state of the art resin in pulp RIP gold recovery technologies
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The team has recently achieved Australia s first ingot poured and produced using a non toxic leaching process can be recovered by having the thiosulphate containing leach solution contact
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