6KCl + 2Al + 4CaO → 6K + Ca(AlO2)2 + 3CaCl2
or\6KCl + 2Al + 4CaO → 6K + CaO•Al2O3 + 3CaCl2
Potassium chloride react with aluminum and calcium oxide to potassium produce, aluminate calcium and calcium chloride.