| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing agglomerated ore which is strong enough to be raw material for a blast furnace even if iron oxide-containing raw material is fired at low temperature, and further has no need of charging a large quantity of heat and can prevent the increase in the amount of a melt when used in a sintering machine.SOLUTION: One or more kinds of low oxidation degree iron source raw materials whose xo showing the oxidation degree of iron satisfies 0 to 1.36 are directly or mixed-molded, are charged into the inside of a firing furnace in an oxidizing atmosphere and are subjected to low temperature firing at ≤850°C. The low oxidation degree iron source raw materials are one or more kinds selected from low oxidation degree iron ore obtained by prereducing high crystallization water ore or the like so as to be reduced into the one equivalent to Fe2O3 or FeO, mill scale at least having an oxidation degree of the same degree or below, steel manufacturing dust such as converter gas and OG gas, sintered ore and pellet, and low oxidation degree ore of ≥10 mass% is at least included. The firing temperature is controlled to ≥250°C, and agglomerated ore having the average particle diameter of 5 to 30 mm is made by sieving after the firing. |
