Direct Leaching of sulfides: Chemistry and applications

Peters, E.

doi:10.1007/bf02698582

Cited by 120 publications

(52 citation statements)

References 2 publications

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“…For example, for chalcopyrite oxidation, elemental sulfur appears as an intermediate (Reaction 1). Peters [71] found higher reaction rates at lower potentials like +450 to +650 mV vs. standard hydrogen electrode (SHE). Nicol and Lazaro [72] demonstrated that, parallel to chalcopyrite leaching (Reaction 3), there occurs a nonoxidative dissolution reaction that enhances its kinetics and is also sensitive to redox potential.…”

Section: Copper Biohydrometallurgymentioning

confidence: 99%

Bioleaching of Arsenic-Bearing Copper Ores

2018

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Abstract:World copper (Cu) production has been strongly affected by arsenic (As) content, because As-rich Cu concentrates are not desirable in the metal foundries. When As-rich Cu concentrates are processed by smelting they release As as volatile compounds into the atmosphere and inside furnaces, generating serious risks to human health. In recent years, exports of Cu concentrates are being penalized for the increasingly high As content of the ores, causing economies that depend on the Cu market to be seriously harmed by this impurity. In the last few decades, biohydrometallurgy has begun to replace the traditional Cu sulfide processing, however bioleaching processes for As-bearing Cu ores which contain enargite are still in the development stage. Researchers have not yet made successful progress in enargite bioleaching using typical mesophilic and thermophilic bacteria that oxidize sulfide. New approaches based on direct oxidative/reductive dissolution of As from enargite could result in significant contributions to Cu biohydrometallurgy. Thus, As-rich Cu concentrates could be pre-treated by bioleaching, replacing current technologies like roasting, pressure leaching and alkaline leaching by selective biological arsenite oxidation or arsenate reduction. In this article, we review the As problem in Cu mining, conventional technologies, the biohydrometallurgy approach, and As bioleaching as a treatment alternative.

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Section: Copper Biohydrometallurgymentioning

confidence: 99%

Bioleaching of Arsenic-Bearing Copper Ores

2018

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“…Previous studies and plant operating data had confirmed the applicability of NSC to chalcopyrite concentrates [6]. Furthermore, the applications of nitrogen species acid leaching systems for treatment of molybdenum concentrates are well documented and have been industrially piloted [7][8][9]. In addition, recent work suggests that the application of industrial hydrometallurgical pressure oxidation of molybdenum concentrates is currently being implemented [10,11].…”

Section: Confirmatory Nsc Pressure Oxidation Combined Copper and Molymentioning

confidence: 99%

NSC Hydrometallurgical Pressure Oxidation of Combined Copper and Molybdenum Concentrates

Fayram¹

2013

J Powder Metall Min

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“…at higher pH and Eh than those indicated by fig. 4 (Garrels and Naeser, 1958;Peters, 1976;Hamilton and Woods, 1981). Furthermore, there is also a likelihood of metastable sulphur species being produced (Garrels and Naeser, 1958).…”

Section: Fig 3 Sem Micrograph Of Corroded Pyrite Remnant Inmentioning

confidence: 99%

An unusual pyrite-sulphur-jarosite assemblage from Arkaroola, South Australia

Nickel

1984

Mineral. mag.

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Direct Leaching of sulfides: Chemistry and applications

Cited by 120 publications

References 2 publications

Bioleaching of Arsenic-Bearing Copper Ores

Bioleaching of Arsenic-Bearing Copper Ores

NSC Hydrometallurgical Pressure Oxidation of Combined Copper and Molybdenum Concentrates

An unusual pyrite-sulphur-jarosite assemblage from Arkaroola, South Australia

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