Method of gold extraction from sulphide gold
The method of obtaining gold from gold-bearing sulfide crushed ore after opening bacterial leaching or oxidized by roasting or pressure oxidation, including leaching solution containing thiosulfate ions sorption complex thiosulfate-gold on strong-base anion exchange resin, the separation of the strong-base anion-exchange, elution of the complex thiosulfate-gold solution containing polythionate ions, separation of gold
More
gold extraction from sulfide ores
Sulphide Gold Ore Treatment by Leaching and Flotation Process. Jan 11, 2018 Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore, at the least capital cost. Chat
More
US474591A - Process of extracting gold from sulphide
2. The herein-described process of treating vauriferous sulphurets, which consists in con-' centrating the sulphurets, acting upon them by a solution of nitric acid mixed with nitrate of mercury,...
More
Method for gold extraction from thrust sulphide ore
SUBSTANCE: method for gold extraction from thrust sulphide ore includes biooxidation with receiving acid pulp and its preparation to sorption leaching of gold by means of neutralisation and by oxygen aeration. At that neutralisation is implemented simultaneously to oxygen aeration at keeping of its content in pulp not less than 10 mg/dm 3.
More
Pyrolysis and extraction of gold from refractory
Pyrolysis and extraction of gold from refractory sulphide concentrates supplementary program : results of supplementary research carried out as MERIWA Project no. M192 at the School of Chemical Engineering, Curtin University of Technology. East Perth, W.A : Minerals and Energy Research Institute of Western Australia. MLA Citation
More
Recovery of Silver, Gold, and Lead From a Complex
Recovery of gold and silver has been based on caustic cyanidation ~ince the 1890's. However, not all ores are amena ble to cyanidation, particularly those containing sulfides (chalcopyrite, sphal erite, galena, etc.). Gold and silver extraction is usually low and cyanide consumption is high because of base metal
More
Extraction of gold, palladium and platinum from
1978-3-1 The extraction of gold, palladium and platinum from hydrochloric acid, hydrobromic acid and iodide media by solutions of di-n-octyl sulphide in cyclohexane was examined. From distribution data it was concluded that the monosolvates AuX 3 DOS and disolvates PdX 2 2DOS are extracted.
More
The extraction of gold from special flotation concentrates
2020-4-2 a solution of sodium sulphide, and ftartenweller suoossfully adapted Feldtmann1s observations to the gold ores at Prestla, West Africa, where a carbonaceous schist interfered with normal cyanide methods. At Prestla, normal cyanide extraction was followed by one application of 0.20 per cent sodium sulphide solution to extract the gold held on the carbon.
More
The elution of gold from activated carbon at room ...
Elution of gold using sulphide solutions Improved rates Q/ elution were obtained at higher sulphide concen-trations and pH values greater than about 13. Higher temperatures increased the initial elution rate, but lowered the overall extraction ~dency, probablY because Q/the deposition Q/ elemental gold on the carbon. Variation Q/the ionic
Moregold extraction from sulfide ores
Sulphide Gold Ore Treatment by Leaching and Flotation Process. Jan 11, 2018 Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore, at the least capital cost. Chat
MoreMethod for gold extraction from thrust sulphide ore
SUBSTANCE: method for gold extraction from thrust sulphide ore includes biooxidation with receiving acid pulp and its preparation to sorption leaching of gold by means of neutralisation and by oxygen aeration. At that neutralisation is implemented simultaneously to oxygen aeration at keeping of its content in pulp not less than 10 mg/dm 3.
MorePyrolysis and extraction of gold from refractory
Pyrolysis and extraction of gold from refractory sulphide concentrates supplementary program : results of supplementary research carried out as MERIWA Project no. M192 at the School of Chemical Engineering, Curtin University of Technology. East Perth, W.A : Minerals and Energy Research Institute of Western Australia. MLA Citation
More
extraction of gold from massive sulfides-Yantai
2021-1-16 The extraction of gold from sulphidic concentrates by roasting ... Sulphide Gold Ore Treatment by Leaching and Flotation Process 18 Apr 2016 Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore at the least capital cost. Environmental Studies of Mineral Deposits in Alaska - USGS ...
More
The extraction of gold from special flotation concentrates
2020-4-2 The sodium, sulphide used was chemically pure, and had the formula llagS.OHgO. The concentrations of the sodium sulphide solutions are given in per cent by weight of the hydrated crystals, The gold solution employed in the first tests was a composite prepared from the cyanidation of several gold ores, and is designated as stock solution number one.
More
Extraction of gold, palladium and platinum from
The extraction of gold, palladium and platinum from hydrochloric acid, hydrobromic acid and iodide media by solutions of di-n-octyl sulphide in cyclohexane was examined. From distribution data it was concluded that the monosolvates AuX(3).DOS and disolvates PdX(2).2DOS are extracted.
More
Extraction of gold (Au) involves the formation of
Pyrite is converted into cuprous sulphide and ferrous sulphide when reacts with oxygen. 2CuFeS 2 + O 2 → Cu 2 S + 2FeS + SO 2. Cuprous sulphide and ferrous sulphide are partially oxidised. 2FeS + 3O 2 → 2FeO + 2SO 2. 2Cu 2 S + 5O 2 → 2CuSO 4 + 2CuO. 2FeO + 1 2 O 2 → Fe 2 O 3. The roasted mass is extracted with water, CuSO 4.5H 2 O ...
More
Process for the extraction of precious metals from ...
Then, gold is removed by solvent extraction preferably with dibutyl carbitol. Next, palladium and platinum are removed by solvent extraction with an alkyl sulphide and tributyl phosphate respectively, care being taken to reduce iridium in solution before platinum extraction to prevent it extracting with the platinum.
MoreThe elution of gold from activated carbon at room ...
Elution of gold using sulphide solutions Improved rates Q/ elution were obtained at higher sulphide concen-trations and pH values greater than about 13. Higher temperatures increased the initial elution rate, but lowered the overall extraction ~dency, probablY because Q/the deposition Q/ elemental gold on the carbon. Variation Q/the ionic
More
Gold Extraction Recovery Processes - 911 Metallurgist
2016-2-29 If the solution is rich enough can be treated by zinc powder and the precipitated obtained (cement) obtained will be sent to retorting and smelting. For gold extraction the strength of cyanide solution ranges from 0.01 to 0.05%. Lime is added
Moregold extraction from sulfide ores
Sulphide Gold Ore Treatment by Leaching and Flotation Process. Jan 11, 2018 Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore, at the least capital cost. Chat
MorePyrolysis and extraction of gold from refractory
Pyrolysis and extraction of gold from refractory sulphide concentrates supplementary program : results of supplementary research carried out as MERIWA Project no. M192 at the School of Chemical Engineering, Curtin University of Technology. East Perth, W.A : Minerals and Energy Research Institute of Western Australia. MLA Citation
Moreextraction of gold from massive sulfides-Yantai
2021-1-16 The extraction of gold from sulphidic concentrates by roasting ... Sulphide Gold Ore Treatment by Leaching and Flotation Process 18 Apr 2016 Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore at the least capital cost. Environmental Studies of Mineral Deposits in Alaska - USGS ...
MoreProcess for the extraction of precious metals from ...
Then, gold is removed by solvent extraction preferably with dibutyl carbitol. Next, palladium and platinum are removed by solvent extraction with an alkyl sulphide and tributyl phosphate respectively, care being taken to reduce iridium in solution before platinum extraction to prevent it extracting with the platinum.
More
CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING
2012-10-4 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. Pyrometallurgical oxidation by roasting is encountered with environmen-tal limitations; thus hydrometallurgical methods are preferred. These methods include
MoreThe elution of gold from activated carbon at room ...
Elution of gold using sulphide solutions Improved rates Q/ elution were obtained at higher sulphide concen-trations and pH values greater than about 13. Higher temperatures increased the initial elution rate, but lowered the overall extraction ~dency, probablY because Q/the deposition Q/ elemental gold on the carbon. Variation Q/the ionic
More
Rcovery of gold in pyritic ores - Mine Engineer.Com
2013-1-13 Using cyanide to recover gold from sulfide ores generally results in 30 to 35% recovery, and the best I have heard of is around 50% recovery. The fine coating of a iron compound definitely appears to be a key component of the inability of cyanide to efficiently leach low grade pyritic ores. Perhaps there is some room here for a pretreatment, to ...
More
A review of gold extraction using noncyanide lixiviants ...
2019-9-11 Alkaline sulfur-containing lixiviants, including thiosulfate, polysulfides, and alkaline sulfide solutions, stand out as a promising class of alternatives to cyanide because of their low toxicity, high efficiency, and strong adaptability. In this paper, we summarized the research progress and remaining challenges in gold extraction using these noncyanide reagents.
More
EXTRACTION OF METALS FROM SULPHIDE MINERALS
2007-9-13 1. Procedure for extracting a value-metal, such as nickel, from a source material such as low grade ore, mill tailings, mill concentrate, or the like, in which the value-metal is present in small concentrations; the procedure is characterized by including: providing a mass of the source material; ensuring that a major part of the mass of the source material consists of sulphide minerals ...
More
Gold extraction - QueensMineDesignWiki
2019-6-28 The challenge of attaining economic extraction of gold from refractory ores is one of the main challenges in the mining industry today, as less refractory ores become more depleted. It is thus important to properly select an extraction method for refractory ores, based on mineralogy, precious metal grades, gold to sulphur ratios and hazardous ...
More