KAREN LOUISE FIELD
A hydrometallurgical process using chloride solutions for recovery of nickel from a saprolytic laterite ore was proposed by Jaguar Nickel Inc. The process claimed selective leaching of nickel over iron and magnesium, the principal impurity elements accompanying nickel in laterite ores. The selectivity was claimed to be a consequence of increased hydrogen ion activity, allowing for economic acid consumption and limited destruction of the laterite lattice. In this study the claims of the Atmospheric Chloride Acid Leach Process (hereafter referred to as the Jaguar Process) were investigated on a saprolytic laterite ore. Atmospheric leaching tests were conducted in order to test whether the claims hold for this different laterite ore. Manipulation of the hydrogen ion activity was tested using a thermodynamic model to predict HCl activity. The acid activity in the test solutions was estimated by a thermodynamic model prediction; however manipulation of the acid activity was shown not to affect nickel selectivity. In fact, the initial rate of nickel leaching was a stronger function of the acid concentration. The Jaguar Process conditions did not yield selective leaching at typical operating concentrations even under conditions of increased acid activity. Nickel contained in the serpentine mineral phase appeared to leach more quickly than the nickel contained in the iron-hydroxide mineral phase.
@article{00028559-1cac-4ead-92bf-2085f5b69cdf,
title={ATMOSPHERIC LEACHING OF A SAPROLYTIC NICKEL LATERITE ORE IN CHLORIDE SOLUTIONS},
author={KAREN LOUISE FIELD},
year={2008},
language={en}
}TY - JOUR TI - ATMOSPHERIC LEACHING OF A SAPROLYTIC NICKEL LATERITE ORE IN CHLORIDE SOLUTIONS AU - KAREN LOUISE FIELD PY - 2008 LA - en ER -
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