Journal
HYDROMETALLURGY
Volume 91, Issue 1-4, Pages 35-55Publisher
ELSEVIER
DOI: 10.1016/j.hydromet.2007.11.009
Keywords
atmospheric leaching; high pressure acid leaching; sulphuric acid; nickel laterite; nickel processing
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This review examines the atmospheric leaching (AL) of nickel laterite ores with sulphuric acid, specifically the limonite, smectite (clay) and saprolite fractions. The kinetics and mechanism of leaching of the key minerals are reviewed together with methods for enhancing nickel recovery. Existing and developing AL processes for extracting nickel and cobalt from these ores are then considered with comparison to high pressure acid leaching (HPAL) technology. This review also provides an overview of the emerging hybrid HPAL/AL and heap leaching technologies. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.
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