| 摘要 |
PROBLEM TO BE SOLVED: To provide a smelting reduction method for iron oxide using a rotary kiln with which service life of a refractory is extended longer than that in the conventional method, and the formation of a ring onto the furnace wall in the rotary kiln can be prevented by setting the operational temperature of the rotary kiln to a lower temperature than the conventional smelting reduc tion temperature. SOLUTION: In the smelting reduction method for iron oxide using the rotary kiln 11 which obtains molten iron 25 by heating and reducing the iron oxide in the furnace 28 of the rotary kiln 11, mixed raw material is manufactured constituting essentially of the iron oxide, a carbonaceous material for reducing the iron oxide and slag-making agent for preventing the formation of the ring onto the furnace wall 29 in the rotary kiln 11 when the molten iron is produced, and this mixed raw material is charged in the furnace 28 of the rotary kiln 11 having an atmospheric temperature of >=1200 deg.C in the furnace, and the iron oxide is reduced with the carbonaceous material to obtain the molten iron 25.
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