2017-Sustainable Industrial Processing Summit
SIPS 2017 Volume 1. Barrios Intl. Symp. / Non-ferrous Smelting & Hydro/Electrochemical Processing

Editors:Kongoli F, Palacios M, Buenger T, Meza JH, Delgado E, Joudrie MC, Gonzales T, Treand N
Publisher:Flogen Star OUTREACH
Publication Year:2017
Pages:264 pages
ISBN:978-1-987820-61-4
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    The CESL Copper-Arsenic Process: Sustainable Processing of Enargite-Bearing Copper Concentrates

    Keith Mayhew1; Patricio Barrios2; Susan Stocker1; Colin Joudrie3;
    1TECK RESOURCES LIMITED, Richmond, Canada; 2AURUBIS, Hamburg, Germany (Deutschland); 3TECK RESOURCES LIMITED, Vancouver, Canada;
    Type of Paper: Regular
    Id Paper: 378
    Topic: 6

    Abstract:

    Current practices for the processing of high-arsenic copper concentrates include: blending with large quantities of clean concentrate; roasting to produce a low-arsenic calcine; and direct smelting in a small number of custom smelters that accept arsenic-bearing concentrates. A sustainable processing alternative to process arsenic-bearing concentrates is via hydrometallurgy, including medium temperature leaching or total oxidative leaching at high temperature. The CESL Cu-As Process, a medium temperature and pressure hydrometallurgical leaching process, has achieved all operating and environment requirements in pilot and demonstration scale campaigns on several blends of high-arsenic concentrates containing up to 10% arsenic content. The benefits of the CESL Cu-As Process for processing of high-arsenic copper concentrates include >97% copper recovery to cathode coupled with >99% deportment of arsenic to stable residues with no particulate, sulphur dioxide, or liquid emissions. Short- and long-term stability tests on residue from the CESL Cu-As Process have proven the stability of arsenic in the crystalline ferric arsenates (basic ferric arsenate sulfate � �Type 2 Scorodite� � and scorodite) which presents an opportunity to sustainably and safely process high-arsenic enargite-bearing copper concentrates.

    Keywords:

    Copper; Non-Ferrous; Pressure; Sustainability;

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    Cite this article as:

    Mayhew K, Barrios P, Stocker S, Joudrie C. (2017). The CESL Copper-Arsenic Process: Sustainable Processing of Enargite-Bearing Copper Concentrates. In Kongoli F, Palacios M, Buenger T, Meza JH, Delgado E, Joudrie MC, Gonzales T, Treand N (Eds.), Sustainable Industrial Processing Summit SIPS 2017 Volume 1. Barrios Intl. Symp. / Non-ferrous Smelting & Hydro/Electrochemical Processing (pp. 77-78). Montreal, Canada: FLOGEN Star Outreach