含杂质2%的生铁1120t含铁的质量是:1120t×(1-2%)=1097.6t;设需要赤铁矿石的质量为x,Fe2O3+3CO 高温 2Fe+3CO2160 11280%x 1097.6t 160 112 = 80%x 1097.6t x=1960t答:需要赤铁矿石1960t