Javier I. Ordoñez, Alicia Condori
Caliche is a mineral exploited in northern Chile, from which iodine and nitrate salts (saltpeter) are obtained. This ore is the most important source of iodine in the world and is processed mainly by heap leaching using water as a leaching agent. Heap leaching of caliche ore is performed by the stacking of Run-Of-Mine (ROM) material, with particle size distribution varying greatly, from a few millimeters to about 1 meter. During leaching, various soluble species of caliche dissolve at different rates, primarily determined by their solubilities. Unlike most leachable ores, as leaching progresses, the particle size decreases. This paper aims to enhance phenomenological models for caliche ore leaching by proposing a model that factors in the simultaneous dissolution of two species from caliche across three particle sizes, acknowledging their differing solubilities and dissolution rates. The conceptual framework asserts that both species dissolve at the particle surface, with the more soluble being gradually depleted, resulting in a collapse of the particle and leaving less soluble material to be dissolved subsequently. The study includes experimental verification of the model using data from column leaching tests designed for this purpose.
@article{4a8e0556-9062-4f77-a79f-c970632564d3,
title={2017 Ordonez Multicomponent heap leaching model for caliche ore},
author={Javier I. Ordoñez and Alicia Condori},
year={2026},
language={en}
}TY - JOUR TI - 2017 Ordonez Multicomponent heap leaching model for caliche ore AU - Javier I. Ordoñez AU - Alicia Condori PY - 2026 LA - en ER -
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