\(Fe_xO_y+\left(y-x\right)CO\underrightarrow{t^o}xFeO+\left(y-x\right)CO_2\)
\(2C_xH_y+\dfrac{4x+y}{2}O_2\underrightarrow{t^o}2xCO_2+yH_2O\)
\(4xFe\left(OH\right)_{\dfrac{2y}{x}}+\left(3x-2y\right)O_2\underrightarrow{t^o}2xFe_2O_3+4yH_2O\)
\(2Fe_xO_y+\left(6x-2y\right)H_2SO_{4\left(đ\right)}\underrightarrow{t^o}xFe_2\left(SO_4\right)_3+\left(3x-2y\right)SO_2+\left(6x-2y\right)H_2O\)