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Jan 01 2016 · Like activated carbon the carbonaceous matter can adsorb the gold cyanide complex thus reducing the recovery of gold in a cyanidebased process During the leaching step once the goldcyanide complex is formed it is readily adsorbed by the carbonaceous matter in the ore thus reporting to the tailings instead of the pregnant solution or activated carbon
Gold ore whose types of deposits are diverse and complex is the mineral assemblage of gold. With features of chalcophile affinity and high melting point, the gold ore includes conglomerate type, porphyry type, quartz vein type and volcanic rock type, etc.
Ore processing plant means that extracts and purifies some elements in the raw ore through a series of complex ore beneficiation flow and professional beneficiation equipment. The refined concentrate powder is mainly used in metallurgy and industry base.
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Diamond reserves and production of South Africa are in the front rank of the world. Large-scale development and utilization of diamonds result in production of a large number of diamond wastes. Resource utilization of diamond waste can turn waste into tre
Powder grinding plant is generally composed of jaw crusher, bucket elevator, electro-vibrating feeder, mainframe and auxiliary engine of grinding mill, draught fan, dust-removing equipment, centralized electronic control and other equipment. According to
Jan 01 2016 · Like activated carbon the carbonaceous matter can adsorb the gold cyanide complex thus reducing the recovery of gold in a cyanidebased process During the leaching step once the goldcyanide complex is formed it is readily adsorbed by the carbonaceous matter in the ore thus reporting to the tailings instead of the pregnant solution or activated carbon
processes carbonaceous gold ores is the presence of carbonaceous matter cmatter which has the ability to adsorb or pregrob gold from the cyanide leach solution It can be responsible for poor recoveries as the carbonaceous materials CMs within the ore competes with activated carbon used during the leaching and
To participate in the 911Metallurgist Forums be sure to JOIN LOGIN Use Add New Topic to ask a New QuestionDiscussion about Hydrometallurgy OR Select a Topic that Interests you Use Add Reply to ReplyParticipate in a TopicDiscussion 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
Sep 01 2020 · The carbonaceous matter was concentrated from a preoxidized carbonaceous gold ore 0005 ± 0001 elemental carbon by dissolution of silicates in carbonaceous ores The dissolution procedure followed two steps which were 1 heated hydrochloric acid and hydrofluoric acid and 2 the metallic sulfide minerals and carbonaceous matter were separated by heavy liquid flotation
Nov 01 2013 · Carbonaceous gold mines are important refractory gold ores The previous results demonstrate that the carbonaceous matter is mainly composed of elemental carbon organic acid and hydrocarbons The dissolved aurocyanide complex is robbed by adsorption of carbonaceous matter which is similar to activated carbon in cyanide leaching of gold
Jan 01 2005 · The mineralogy associated with carbonaceous gold ores can be quite variable Afenya 1991 The pregrobbing components of the ore are generally carbonaceous materials such as wood chips noncarbonate carbon or other components particularly native elemental carbon Rees and van Deventer 2000 In some cases the carbonaceous matter adsorbs the solubilized goldcyanide complex from leach solutions
carbonaceous component of the ore competes with activated carbon used during the leaching and adsorption phase of processing The ability of carbonaceous material to adsorb gold I cyanide from solution is widely acknowledged and documented2781214 Early
Aug 01 1999 · Previous studies indicate that apart from carbonates carbonaceous material in refractory gold bearing ore consists of i a native carbon component capable of acting like activated charcoal and therefore able to adsorb gold cyanide complexes from solution ii a heavy hydrocarbon mixture of a high molecular weight usually associated with the native carbon component and which appears not to interact directly with gold and iii an organic acid similar to humic
Jan 01 1991 · The deleterious effect of carbonaceous matter in gold ores on cyanidation has been recognized by the mining industry for many years Prominent among the USA carbonaceous refractory gold deposits are those of Carlin Mines Gold Quarry and Maggie Creek in the Carlin Trend Nevada and Gold Acres and Getchell Mine in the Cortez Trend Nevada
Carbonaceous matter in refractory gold ore is known to be one of the primary causes of gold recovery loss Model experiments were conducted to simulate the biomodification of carbonaceous matter using powdered activated carbon PAC as a surrogate and cell
effective gold recovery during this process is the presence in the ores of an active carbonaceous matter cmatter which has the ability to adsorb or pregrob gold from the cyanide leach solution Carbonaceous matter present in the Carlin type carbonaceous sulphide ores has shown varying degree of pregrobbing activity 13
PART III THE IMPLICATIONS OF PROCESSING PRESTEA CARBONACEOUS GOLD ORE General Introduction CHAPTER 6 FLOTATION OF GOLD AND GRAPHITE AND PRESTEA CARBONACEOUS GOLD ORE 61 Introduction 220 62 Experimental 225 621 Materials 225 622 Flotation of gold and synthetic graphite 225 623 Flotation of Prestea carbonaceous matter 228
Aug 01 1999 · Hausen DM Bucknam CH Study of PregRobbing in the Cyanidation of Carbonaceous Gold Ores from Carlin Nevada Applied MineralogyProceedings of the 2nd International Congress on Applied Mineralogy in the Minerals Industry 833856 1985 Jha MC Refractoriness of certain gold ores to cyanidation Probable causes and possible solutions
The carbonaceous matter present in an ore can adsorb dissolved gold in the conventional cyanide leaching process and this phenomenon is known as pregrobbing
Double refractory gold ores DRGO contain metal sulfides that encapsulate gold and prevent its dissolution by cyanide and carbonaceous matter CM that adsorbs gold cyanide complex Pretreatment is therefore required to decompose the sulfides and liberate gold before cyanidation and
The second occurs when graphite or carbonaceous matter is present In this case the gold leaches well into the cyanide solution but then the carbonaceous minerals reabsorb the gold back into the pulp This is known as “pregrobbing” SGS experts will identify the best solution for your ore as there are many methods to choose from
In the case of Goldstrike this was a doublerefractory ore combining sulphideoccluded gold with pregrobbing carbonaceous material that rendered the ore unsuitable for conventional cyanide leaching and carbon adsorption In most cases gold processing with cyanide leaching usually with carbon adsorption is still the core technology and the
chemical compounds can passivate the carbonaceous matter by selective adsorption or wetting of its surface Treatments of carbonaceous ores with chemical surfactants blanking reagents have shown promising results but at the same time have demonstrated that if not properly used could have a strong detrimental effect on the gold recovery process
Pregrobbing is an important phenomenon that inhibits gold recovery due to the presence of naturally occurring carbonaceous matter In case of certain ores gold recovery by cyanidation is limited
The naturally occurring carbonaceous material CM in gold bearing ores often exhibits strongpregrobbing properties It can adversely affect the process of gold recovery during the cyanidation due to its ability to adsorb or pregrob gold from the cyanide leach solution Treatments of carbonaceous ores with chemical surfactants as blinding agents to limit pregrobbing have shown promising
solutions during the processing of carbonaceous ores During processing of Goldstrike ore cyanide ions complex elemental gold to form aqueous Au CNŽy 2 complexes A carboninleach CIL circuit removesŽ the gold–cyanide complex from the aqueous solution by adsorption onto coarsegrained commercial activated carbon
process recorded the best gold extraction of 815 for sample A S Setonii degraded carbonaceous matter unlike T versicolor which passivated it However it takes only 3 7 days for T versicolor to effect passivation and eliminate pregrobbing while 14 56 days is required for S setonii to degrade carbonaceous matter significantly
Jan 01 2016 · Like activated carbon the carbonaceous matter can adsorb the gold cyanide complex thus reducing the recovery of gold in a cyanidebased process During the leaching step once the goldcyanide complex is formed it is readily adsorbed by the carbonaceous matter in the ore thus reporting to the tailings instead of the pregnant solution or activated carbon
processes carbonaceous gold ores is the presence of carbonaceous matter cmatter which has the ability to adsorb or pregrob gold from the cyanide leach solution It can be responsible for poor recoveries as the carbonaceous materials CMs within the ore competes with activated carbon used during the leaching and
To participate in the 911Metallurgist Forums be sure to JOIN LOGIN Use Add New Topic to ask a New QuestionDiscussion about Hydrometallurgy OR Select a Topic that Interests you Use Add Reply to ReplyParticipate in a TopicDiscussion 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
Sep 01 2020 · The carbonaceous matter was concentrated from a preoxidized carbonaceous gold ore 0005 ± 0001 elemental carbon by dissolution of silicates in carbonaceous ores The dissolution procedure followed two steps which were 1 heated hydrochloric acid and hydrofluoric acid and 2 the metallic sulfide minerals and carbonaceous matter were separated by heavy liquid flotation
Nov 01 2013 · Carbonaceous gold mines are important refractory gold ores The previous results demonstrate that the carbonaceous matter is mainly composed of elemental carbon organic acid and hydrocarbons The dissolved aurocyanide complex is robbed by adsorption of carbonaceous matter which is similar to activated carbon in cyanide leaching of gold
Jan 01 2005 · The mineralogy associated with carbonaceous gold ores can be quite variable Afenya 1991 The pregrobbing components of the ore are generally carbonaceous materials such as wood chips noncarbonate carbon or other components particularly native elemental carbon Rees and van Deventer 2000 In some cases the carbonaceous matter adsorbs the solubilized goldcyanide complex from leach solutions
carbonaceous component of the ore competes with activated carbon used during the leaching and adsorption phase of processing The ability of carbonaceous material to adsorb gold I cyanide from solution is widely acknowledged and documented2781214 Early
Aug 01 1999 · Previous studies indicate that apart from carbonates carbonaceous material in refractory gold bearing ore consists of i a native carbon component capable of acting like activated charcoal and therefore able to adsorb gold cyanide complexes from solution ii a heavy hydrocarbon mixture of a high molecular weight usually associated with the native carbon component and which appears not to interact directly with gold and iii an organic acid similar to humic
Jan 01 1991 · The deleterious effect of carbonaceous matter in gold ores on cyanidation has been recognized by the mining industry for many years Prominent among the USA carbonaceous refractory gold deposits are those of Carlin Mines Gold Quarry and Maggie Creek in the Carlin Trend Nevada and Gold Acres and Getchell Mine in the Cortez Trend Nevada
Carbonaceous matter in refractory gold ore is known to be one of the primary causes of gold recovery loss Model experiments were conducted to simulate the biomodification of carbonaceous matter using powdered activated carbon PAC as a surrogate and cell
effective gold recovery during this process is the presence in the ores of an active carbonaceous matter cmatter which has the ability to adsorb or pregrob gold from the cyanide leach solution Carbonaceous matter present in the Carlin type carbonaceous sulphide ores has shown varying degree of pregrobbing activity 13
PART III THE IMPLICATIONS OF PROCESSING PRESTEA CARBONACEOUS GOLD ORE General Introduction CHAPTER 6 FLOTATION OF GOLD AND GRAPHITE AND PRESTEA CARBONACEOUS GOLD ORE 61 Introduction 220 62 Experimental 225 621 Materials 225 622 Flotation of gold and synthetic graphite 225 623 Flotation of Prestea carbonaceous matter 228
Aug 01 1999 · Hausen DM Bucknam CH Study of PregRobbing in the Cyanidation of Carbonaceous Gold Ores from Carlin Nevada Applied MineralogyProceedings of the 2nd International Congress on Applied Mineralogy in the Minerals Industry 833856 1985 Jha MC Refractoriness of certain gold ores to cyanidation Probable causes and possible solutions
The carbonaceous matter present in an ore can adsorb dissolved gold in the conventional cyanide leaching process and this phenomenon is known as pregrobbing
Double refractory gold ores DRGO contain metal sulfides that encapsulate gold and prevent its dissolution by cyanide and carbonaceous matter CM that adsorbs gold cyanide complex Pretreatment is therefore required to decompose the sulfides and liberate gold before cyanidation and
The second occurs when graphite or carbonaceous matter is present In this case the gold leaches well into the cyanide solution but then the carbonaceous minerals reabsorb the gold back into the pulp This is known as “pregrobbing” SGS experts will identify the best solution for your ore as there are many methods to choose from
In the case of Goldstrike this was a doublerefractory ore combining sulphideoccluded gold with pregrobbing carbonaceous material that rendered the ore unsuitable for conventional cyanide leaching and carbon adsorption In most cases gold processing with cyanide leaching usually with carbon adsorption is still the core technology and the
chemical compounds can passivate the carbonaceous matter by selective adsorption or wetting of its surface Treatments of carbonaceous ores with chemical surfactants blanking reagents have shown promising results but at the same time have demonstrated that if not properly used could have a strong detrimental effect on the gold recovery process
Pregrobbing is an important phenomenon that inhibits gold recovery due to the presence of naturally occurring carbonaceous matter In case of certain ores gold recovery by cyanidation is limited
The naturally occurring carbonaceous material CM in gold bearing ores often exhibits strongpregrobbing properties It can adversely affect the process of gold recovery during the cyanidation due to its ability to adsorb or pregrob gold from the cyanide leach solution Treatments of carbonaceous ores with chemical surfactants as blinding agents to limit pregrobbing have shown promising
solutions during the processing of carbonaceous ores During processing of Goldstrike ore cyanide ions complex elemental gold to form aqueous Au CNŽy 2 complexes A carboninleach CIL circuit removesŽ the gold–cyanide complex from the aqueous solution by adsorption onto coarsegrained commercial activated carbon
process recorded the best gold extraction of 815 for sample A S Setonii degraded carbonaceous matter unlike T versicolor which passivated it However it takes only 3 7 days for T versicolor to effect passivation and eliminate pregrobbing while 14 56 days is required for S setonii to degrade carbonaceous matter significantly
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