Arsenic behavior in the autoclave-hydrometallurgical processing of refractory sulfide gold-platinum-bearing products

Петров, Г. В.; Фокина, С. Б.; Boduen, A. Ya.; Zotova, Irina; Fidarov, B F.

doi:10.14419/ijet.v7i2.2.9897

Cited by 6 publications

(2 citation statements)

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“…It seems promising to use the method of step crystallization, which allows precipitating arseniccontaining solid phase that is stable during long-term storage [20].…”

Section: Introductionmentioning

confidence: 99%

Arsenic Precipitation from Solutions in Autoclave-Hydrometallurgical Technology of Processing Sulphide Concentrates

Andreev¹

2020

SSP

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Currently, the share of gold extracted from technologically simple gold ores is steadily decreasing, which determines the involvement in the processing of refractory gold ores containing finely disseminated gold and silver in sulfides, mainly in pyrites and arsenopyrites. Autoclave oxidation is a promising method of pretreatment of the refractory sulfide-arsenic gold-bearing raw materials before cyanidation. A serious problem of auriferous ores autoclave-hydrometallurgical processing is the removal of contained arsenic into relatively harmless and capable of being kept forms. This article shows the results of behavior of arsenic during the neutralization of solid after autoclave oxidative leaching of refractory gold-containing materials.

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“…It seems promising to use the method of step crystallization, which allows precipitating arseniccontaining solid phase that is stable during long-term storage [20].…”

Section: Introductionmentioning

confidence: 99%

Arsenic Precipitation from Solutions in Autoclave-Hydrometallurgical Technology of Processing Sulphide Concentrates

Andreev¹

2020

SSP

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“…To date, the most promising from an economic and environmental point of view, and quite widely used in production practice technologies for processing refractory gold-bearing raw materials are: bacterial (BIOX) and autoclave (POX) oxidation [12][13][14][15][16]. The advantages of these technologies are the absence of any toxic gaseous emissions, the removal of arsenic from technologies in the form of low-toxic arsenate of iron and compared to roasting, a higher extraction of gold at the stage of cyanidation [17][18].…”

mentioning

confidence: 99%

Comparison of Methods of Processing the Gold - Containing Refractory Concentrates

Kozlovskaya¹,

Tjprc²

2019

IJMPERD

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Persistent ores, which are characterized by insufficient gold recovery under traditional conditions of cyanide leaching, occupy a prominent place in resource base of the modern gold mining industry. Gold in such ores is in a state of fine dispersion in sulfide minerals, most often in pyrite and arsenopyrite. Refining refractory gold ores to enhance extraction at cyanidation involves pretreatment. Traditional technologies for extraction of gold from sulfide refractory ores include flotation concentration, roasting and subsequent calcification of the calcine. However, the use of roasting is characterized by inevitable environmental pollution through gaseous emissions of arsenic and sulfur, the need for disposal of highly toxic arsenic trioxide and insufficiently high through-flow gold extraction in the technology. To date, the most environmentally friendly, highly profitable and fairly widely used ways in production practice technologies for processing refractory gold-bearing raw materials are: bacterial and autoclave oxidation. Experimental studies of the process of direct cyanidation of gold-containing flotation concentrate, as well as products of its preliminary oxidation using various methods (calcination of oxidative roasting, autoclave kecks (POX) and bacterial leaching (BIOX)) gave the following results: Cyanidation of the initial flotation concentrate provides for the extraction of Au 46.6%; the use of oxidative roasting leads to an increase in extraction of gold from 46.6% to 85%; the use of BIOX technology allows to increase the extraction of gold to 91.74%; preliminary autoclave oxidative leaching of flotation concentrate provides a stably high recovery of Au with subsequent cyanidation-at the level of 94.9-96.5%. The introduction of autoclave and biological oxidation is an important element in the intensification of technological processes, improving the industrial safety of gold processing enterprises and improving working conditions of production personnel.

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Hydro-Liquefaction of Tile-Like Barzas Coals in the Presence of Some Transition Metal Additives

et al. 2019

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Using a laboratory micro-autoclave (of ~ 20 cm3 volume), the effects of transition metal additives (MoO3, Fe2O3 and commercial AlCoMo catalyst) on the thermal transformations of tile-like Barzas coals (sapromixites) in a hydrogen medium at T ~ 475°C and P ~ 6.0-7.5 MPa have been studied. It has been shown that catalytic additives under investigation somewhat suppress gas formation processes, facilitating the increase in H/C atomic ratios and in the amount of alkyl-containing structures in resin-like solid products of Barzas coal hydro-liquefaction. Maximal yields of “coal liquids” (maltenes + asphaltenes) (~ 35 wt.%, daf basis) were obtained during the heat treatment of sapromixites in the presence of bb1 wt.% MoO3.

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Arsenic behavior in the autoclave-hydrometallurgical processing of refractory sulfide gold-platinum-bearing products

Cited by 6 publications

References 1 publication

Arsenic Precipitation from Solutions in Autoclave-Hydrometallurgical Technology of Processing Sulphide Concentrates

Arsenic Precipitation from Solutions in Autoclave-Hydrometallurgical Technology of Processing Sulphide Concentrates

Comparison of Methods of Processing the Gold - Containing Refractory Concentrates

Hydro-Liquefaction of Tile-Like Barzas Coals in the Presence of Some Transition Metal Additives

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