Dissolution kinetics of copper from multi-metal copper alloy roasted in oxygen

Abstract

A kinetic study on the sulfuric acid leaching of multi-metal oxide, which is the product of multi-metal copper alloy with iron trioxide roasted in oxygen, was carried out. The effects of leaching time, stirring speed, sulfuric acid concentration, reaction temperature, and particle size of the multi-metal oxide on the kinetics and mechanism of copper extraction were studied. It was found that the reaction kinetic model about the copper extraction from multi-metal oxide follows the mixed kinetic shrinking core mode: 1/3ln(1–X)+(1–X)^–1/3–1=680.5C(H₂SO₄)^0.4297d_P^–0.75115exp(–E_a/RT)t.

Keywords

leaching kinetic / multi-metal copper alloy / roasting

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