\(n_{Fe} = \dfrac{5000.1000}{56} = \dfrac{625000}{7}\ kmol\\ n_{FeS_2\ đã\ dùng} = \dfrac{n_{Fe}}{H\%} = \dfrac{\dfrac{625000}{7}}{89,6\%} = 99649,23\ kmol\\ m_{quăng\ pirit} = \dfrac{m_{FeS_2}}{90\%} = \dfrac{99649,23.120}{90\%} = 13259897,33 (kg) = 13259,89(tấn)\)
\(n_{Fe}=\dfrac{5000\cdot10^6}{56}=\dfrac{625}{7}\cdot10^6\left(mol\right)\)
\(BTFe:\)
\(n_{FeS_2}=n_{Fe}=\dfrac{625}{7}\cdot10^6\left(mol\right)\)
\(n_{FeS_2\left(tt\right)}=\dfrac{\dfrac{625}{7}\cdot10^6}{89.6}=\dfrac{56000\cdot10^6}{7}\left(mol\right)\)
\(\Rightarrow m_{FeS_2}=\dfrac{56000\cdot10^6\cdot120}{7}=960000\cdot10^6\left(g\right)=960000\left(tấn\right)\)
\(m_{quặng}=\dfrac{960000\cdot100}{90}=1066666.67\left(tấn\right)\)