The removal of sulfur and antimony from a tetrahedritic concentrate containing 25.4% Cu, 21.5% Fe, 20.5% S and 13.8% Sb was studied using a laboratory scale laminar flow furnace. The gas preheating temperatures were 500-1100°C; the atmospheres N2, and N2 with up to 50% O2 and up to 5% SO2. Two narrow particle size fractions were used with x=20-38 μm and x=62-74 μm. Desulfurization was found to proceed continuously along with increasing gas preheating temperature and oxygen concentration. However, a minimum was found in the antimony removal curve. Chemical and morphological analyses of the oxidation products and a thermodynamic approach to the prevailing reaction system were used to determine details of the reaction mechanisms in the flash oxidation of antimony-bearing minerals.
|Julkaisu||Scandinavian Journal of Metallurgy|
|Tila||Julkaistu - 1989|
|OKM-julkaisutyyppi||A1 Julkaistu artikkeli, soviteltu|