Víctor Quezada, Antoni Roca
An option to improve the leaching efficiency of chalcopyrite is pretreatment prior to leaching. This study aimed to evaluate the effects of sulphuric acid and sodium chloride agglomeration and curing on chalcopyrite leaching at various temperatures (25, 50, 70, and 90 °C). The pretreated ore and leach residues were characterized using X-ray diffraction, scanning electron microscopy, and reflected light microscopy. The findings revealed that under the conditions of 15 kg/t of H2SO4, 25 kg/t of NaCl, and 15 days of curing time, several products were identified, including CuSO4, NaFe(SO4)2(OH)6, Cu2Cl(OH), and S0. Notably, increasing the curing time and leaching temperature led to enhanced copper leaching, achieving a remarkable extraction of 94% when leaching at 90 °C after pretreatment with 50 g/L of Cl⁻ and 0.2 M of H2SO4. Additionally, the presence of elemental sulphur, jarosite, and copper polysulphide (Cu5S2) was confirmed in the leaching residues.
@article{3bbe1729-199d-4f95-bed6-26de00e1f0dd,
title={The Effects of Sulphuric Acid and Sodium},
author={Víctor Quezada and Antoni Roca},
year={2026},
language={en}
}TY - JOUR TI - The Effects of Sulphuric Acid and Sodium AU - Víctor Quezada AU - Antoni Roca PY - 2026 LA - en ER -
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