With using Setsys Evolution synchronous thermal analysis system the thermodynamic process of reaction of MgO-C-S (FeS) on 3 kinds of scheme- (1 ) magnesium oxide + carbon powder + sulphur
) with heating rate 10 ~25 °C/min nitrogen atmosphere at 1 350 ℃ has been tested and researched to get differential thermal-thermo gravimetric curves. Results show that the reaction temperature of MgO-C-FeS system is lower than that of MgO-C-S system
and with adding thermite in MgO-C-FeS system the reaction of system shall be moved up.