Pressure leaching of high arsenic copper concentrates under CESL process conditions

Proceeding of Conference of Metallurgist, The Canadian Institute of Mining, Metallurgy and Petroleum, Canada, 28 de septiembre-1 de octubre 2014.


Two copper concentrate with medium and high enargite content were leached in a 3 L autoclave reactor under conditions based on the CESL process. Copper, arsenic, sulfur and iron were checked in all the experiments and antimony, zinc and molybdenum were evaluated in selected tests. The 98% of the obtained copper extraction is agree with others authors, but the behavior of arsenic, iron an sulfur have some differences. The solid residue was characterized by chemical analysis, DRX and QEMSCAN®. Finally a comparative analysis with neutral roasting as an option for the treatment of this concentrate is done.

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