EFFECTS OF VOLATILE MATTER IN COAL ON REDUCTION RATE OF MOLTEN IRON-OXIDE

Molten oxide containing iron oxide was reduced with coal, char as well as graphite at temperatures 1300, 1350 and 1400-degrees-C. It is reve aled that volatile matter in coal accelerates reduction rate of the ox ide. Apparent rate constants can be expressed empirically as follows: for coal containing volatile matter: In k1 = -5.00 X 10(3)/T - 4.08 (s -1) for char and graphite : In k3 = -11.0 x 10(3)/T - 1.73 (s-1) When the surfaces of coal, char as well as graphite are surrounded with foa m of the molten oxide, the reduction comes to a halt while carbonaceou s material and molten iron oxide remain in the reaction system.