Effect of a pre-treatment with hydrochloric acid on the copper solubilization of a bornite concentrate with posterior leaching in chloride medium

The formation of soluble species from a bornite flotation concentrate pre-treated with hydrochloric acid was studied. Copper recovery after leaching in H2SO4-NaCl solution determined. influence concentration and ore particle size were evaluated. Chemical morphological characterization the samples before carried out by XRD SEM to evaluate changes bornite. It revealed that increasing during pre-treatment dramatically enhances species, reaching one case 49.0% copper dissolution 15 d pretreatment 24 h leaching, both at 25 °C, without reducing concentrate. also did not affect transformation rate into due corrosive effect HCl, which fractured generated micro-pores on surface particles