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Extraction 2018 pp 1621-1629 | Cite as

In Situ Precipitation of Scorodite in Atmospheric Leaching of Enargite

  • Fazel G. JahromiEmail author
  • Ahmad Ghahreman
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Enargite, known as one of the major arsenic containing copper minerals, with approximately 19% arsenic, introduces challenges to typical processing options. In most hydrometallurgical processing methods, arsenic remediation occurs after the copper recovery in an autoclave or in a stepwise neutralization process. In this study, the in situ precipitation of scorodite was investigated during an atmospheric leaching process in the presence of carbon-based catalysts and chloride media. The effective parameters of initial ferric addition, temperature, catalyst addition, and oxygen sparging rate were studied and the ferric behaviour was monitored during the scorodite precipitation. The most influential parameters on efficient scorodite precipitation are found to be: initial ferric addition, catalyst to concentrate ratio, and temperature. A 99% scorodite precipitation yield was achieved in this process.

Keywords

Scorodite Arsenic Chloride Activated carbon AF5 Copper Iron Sulfide ore Leaching 

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.The Robert M. Buchan Department of Mining EngineeringQueen’s UniversityKingstonCanada

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