PURPOSE: To produce a charging material for blast furnace capable of improving a blast furnace operation record by coating the external surface of metallurgical lump coke with a mixture of specific amounts of iron ore fines and binder and then burning the resulting raw fuel compound material.
CONSTITUTION: Lump coke (about 10-50mm average diameter) is used as a core and the outer core surface of this core is coated with a mixture of iron ore fines (≤1mm average diameter) and binder (quick lime, slaked lime, etc.), by which a raw fuel compound material is formed. At this time, the weight ratio of the iron ore fines to the lump coke is regulated to 1:1 to 4:1, and the blending amount of the binder is regulated so that the binder comprises about 3-6wt.% of the compound material. Subsequently, the raw fuel compound material formed as mentioned above is burned in the air at about 1200°C for about 15min so as to be formed into the charging material for blast furnace. By using this charging material, the mixture layer of coke and ore in the blast furnace can be controlled, and blast furnace operation can be stabilized to a greater extent.
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