Oxidation of a Violarite-Based Nickel Concentrate under Simulated Flash SmeltingConditions

摘要

A single-particle laminar-flow furnace was used to study oxidation of a violarite- and pyrite-containing nickel concentrate from the mine of Forrestania (AUS). The composition of the reaction gas varied from N2 to N2 + 75 Vol% O2 and the gas preheating temperatures ranged from 500 to 1100 deg C. Chemical analysis of the particles were used to determine the oxidation degree of the material. Optical and scanning electron microscopy were used to detect morphology and mineralogy of the oxidation products. Total desulphurization of this nickel concentrate was observed already at 900 deg C with 50 vol% oxygen in the reaction gas.