Extraction of metal from sulfide oreThere are two method:1) Conversion into oxide (roasting) followed by reduction smelting:MS MO MMS(s)+ 3/2O2(g) = MO(s) + SO2(g) + SO2(g) at 600-900oCMO(s) + CO(g)/C(s) =M(l) + CO2(g)/CO(g)e.g. extraction of Pb, Zn, Mo etc, from their sulphide ores, except for Cu andNi ores.2) Matte smelting e.g. extraction of Cu and Ni from their sulphide ore.