By replacing the Merrill–Crowe zinc cementation step carbon in pulp CIP and carbon in leach CIL recovery provided a process that allowed the treatment of lower grade and problematic ores
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Ab initio calculations have been carried out on systems that represent a model of the processes which occur in the recovery of gold by the carbon in pulp process Using the hydrocarbon coronene as a model of graphitic carbon it has been shown that a a positively charged ion such as calcium must be present for adsorption of gold to occur b if copper is present in the liquor it will
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SYNPOSIS ThAn accoun is given of developments in the use of activated carbon for the recovery of gold from cyanide solutions carbon In pulp p ocess employed at the Homestake Mine is described
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recovery cigarettes and gold recovery Wood based Large organics from industrial streams eg Vodka colorants from liquids Coal based Potable water treatment waste water treatment In the gold industry High affinity towards gold Hard abrasion resistant Density suited to pulp Source material supply not limiting 21
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Although the era of CIP commenced in the late 1970s the use of carbon for the recovery of gold was recognized and practiced much earlier Davis 1880 patented the use of wood charcoal for gold recovery from chlorination leach liquors with this process subsequently used at Mount Morgan Australia in the early 1890s
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recovery of gold by carbon in pulp was the introduction in 1973 of the process at the Homestake Mine12 14 in South Dakota where approximately 2250 tons of cyanided slime is treated per day This carbon in pulp plant which has been operating in a highly successful manner since
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The paper presents a mixed integer nonlinear programming MINLP approach to construction and operational optimization of carbon in pulp CIP processes related to hydrometallurgical gold recovery plants In this plant section gold in the form of aurocyanide complex ions is adsorbed on the active sites of carbon particles This takes place in a series of agitated tanks where carbon is
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Carbon in Pulp CIP is a technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process a gold extraction technique Introduced in 1985 Carbon in Pulp is regarded as a simple and cheap process As such it is used in most industrial applications where the presence of competing silver or copper does not prohibit its use
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A process for adsorbing gold from a leach pulp by means of activated carbon is described in which the leach pulp the leach solution together with the subdivided gold bearing ore is diluted to a specific gravity of less than that of the activated carbon and is subsequently passed upwardly through a multistage liquid/solid contacting column
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Process Introduction Carbon in Pulp CIP is a simple and cheap technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process ick for Process Flow>> Application There are two situations suitable for gold CIP production line pulp after forth flotation process or gravity tailings mudded oxidized ore
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The carbon in pulp method is only used where tank leaching is utilized for the recovery of gold from the ores and this is not the case in most large gold mines today since heap leaching is the lowest cost method for recovering gold from ores containing from a few grams to 5 or 6 grams per ton
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The recovery of gold cyanide from a cyanide leach pulp C I P Process by contact thereof with activated carbon has become an extremely successful method of recovery of dissolved gold resulting in high recoveries and correspondingly low losses in the tailings
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The recovery of gold cyanide from a cyanide leach pulp C I P Process by contact thereof with activated carbon has become an extremely successful method of recovery of dissolved gold resulting in high recoveries and correspondingly low losses in the tailings
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The AMIRA P420A Gold Industry Survey of Australasian mining operations Barbetti et al 2000 showed that many gold mining operations used a single point activity test for on site carbon evaluation Although several different methods were reported all involve the collection of a single solution sample at the end of the test and the use of a simple ratio equation to calculate activity relative
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by activated coconut carbon is a well proven process widely used to recover gold from slurry at cyanide leaching plants In this research modelling of adsorption of dissolved gold performed by using real CIP carbon in pulp plant data For this aim five kinetic models and the gold mass balance calculations were used together
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The carbon in the reactor into which pregnant pulp is fed referred to as the first reactor becomes highly loaded with gold Loaded carbon values on operating plants range from 300 to 20 000 grams of gold per ton of carbon a concen trating factor of about 1 000–1 500 A portion of the loaded carbon is periodically removed from the first
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1 2 The Carbon in pulp ProcessProcess Chemistry and Unknown Areas 3 a Leaching of Gold from the Ore 3 b Adsorption of Aurocyanide onto Activated Carbon l c Carbon Acid Washing and Elution 7 d Gold Electrot inning or Precipitation 8 e Carbon Reactivation 8 f
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This article serves to discuss the fundamental aspects of gold recovery utilizing the Carbon in Pulp or Carbon in Leach processes The purpose is to describe in simple terms what activated carbon is all about and how it adsorbs gold The understanding of the mechanism of gold adsorption is important because the CIP/CIL processes work as
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Since activated carbon always absorbs gold from the solution the gold left in the lean solution is lower than the zinc powder replacement method so the gold recovery rate of CIP method is high 5 Gold CIP method is particularly suitable for gold bearing oxidized ores that are rich in mud and difficult to settle and filter
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A countercurrent carbon in pulp pilot plant test was made for the adsorption and recovery of gold on minus 6 plus 16 mesh coconut carbon from cyanide leach slurries of the jig tailing The ore was in two lots containing 0 33 and 0 42 oz/ton Au and was leached in cyanide solutions containing 0 05 and 0 1 pet NaCN respectively at pH 11
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Particularly in gold recovery activated carbon is the key element in CIC CIL and CIP processes As a major manufacturer of activated carbon specialized for the gold mining industry and precious metals recovery we service some of the world s largest mining companies
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Carbon In Leach CIL The carbon in leach process integrates leaching and carbon in pulp into a single KEMIX CORPORATE BROCHURE This covers Carbon in Pulp CIP and Carbon in Leach CIL circuits for gold and silver recovery and Resin in Pulp RIP circuits for the recovery of gold
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By replacing the Merrill–Crowe zinc cementation step carbon in pulp CIP and carbon in leach CIL recovery provided a process that allowed the treatment of lower grade and problematic ores
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1 Introduction The carbon in pulp process for gold recovery involves treatment with cyanide under aerobic conditions at high pH to give the Au CN 2 − ion which is then recovered by adsorption on carbon followed by elution of the Au CN 2 − in caustic solution and electrowinning of the gold In this study the stability of models of the carbon–gold complexes are studied by Hartree
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Although the era of CIP commenced in the late 1970s the use of carbon for the recovery of gold was recognized and practiced much earlier Davis 1880 patented the use of wood charcoal for gold recovery from chlorination leach liquors with this process subsequently used at Mount Morgan Australia in the early 1890s
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Carbon in leach and carbon in pulp are continuous processes that use activated carbon in a cascade of large agitated tanks which have been widely used to recover or concentrate precious metals in gold extraction plants In the carbon in pulp process adsorption occurs after the leaching cascade section of the plant and in the carbon in leach process leaching and adsorption occur simultaneously
Get Pricecarbon in pulp plants developed up to this time One of the first plants to operate on this flowsheet was the carbon in pulp plant at the Carlton Mill at Cripple Creek in Coloradoll which was operating in 1961 Homestake Gold Mine The biggest and most important development in the recovery of gold by carbon in pulp was the introduction
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Carbon in leach and carbon in pulp are continuous processes that use activated carbon in a cascade of large agitated tanks which have been widely used to recover or concentrate precious metals in gold extraction plants In the carbon in pulp process adsorption occurs after the leaching cascade section of the plant and in the carbon in leach process leaching and adsorption occur simultaneously
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Gold Recovery Via Activated Carbon from Cyanide Liquors Containing Cuprous Cyanocomplexes Activated carbon is widely used for gold recovery from cyanide leach liquors via carbon in leach CIL or carbon in pulp CIP technology From all the base metals cyanide complexes typically
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SYNPOSIS ThAn accoun is given of developments in the use of activated carbon for the recovery of gold from cyanide solutions carbon In pulp p ocess employed at the Homestake Mine is described
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by activated coconut carbon is a well proven process widely used to recover gold from slurry at cyanide leaching plants In this research modelling of adsorption of dissolved gold performed by using real CIP carbon in pulp plant data For this aim five kinetic models and the gold mass balance calculations were used together
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The carbon in the reactor into which pregnant pulp is fed referred to as the first reactor becomes highly loaded with gold Loaded carbon values on operating plants range from 300 to 20 000 grams of gold per ton of carbon a concen trating factor of about 1 000–1 500 A portion of the loaded carbon is periodically removed from the first
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Carbon in pulp CIP is an extraction technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process Hard carbon particles much larger than the ore particle sizes can be mixed with the ore and cyanide solution mixture
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