Question

Fe3O4的有关方程冶炼2000t含杂质3%的生铁,需要含Fe3O490%的磁铁矿石多少吨?

Answer 1

x * 90% * 3*56/(3*56+4*16) = 2000*(1-3%)

=> x = 2000*(1-3%)*(3*56+4*16)/(3*56*90%) = 2976.72t