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Abstract
To elucidate the gaseous reduction behavior of iron ore sinter, it is necessary to know the effect of SiO2, which is contained in the ore as a gangue mineral, and to know the reducibility of FeO in solidified CaO-SiO2-FeO slag. In the present study, the gaseous reduction behavior of the CaO-SiO2-FeO slag, 2FeO·SiO2, and CaO·FeO·SiO2 powder has been investigated, and the rate constants of hydrogen reduction are derived to be about 0.4 and 0.6 mol/(s·m3·atm) for 2FeO·SiO2 and CaO·FeO·SiO2, respectively. The rate constants for the reduction of 2FeO·SiO2 and CaO·FeO·SiO2 with CO are one order of magnitude smaller than with H2.