Abstract
The dense wustite plates containing SiO2 or SiO2-CaO have been reduced isothermally in a stream of hydrogen at temperatures between 1000 and 1345°C. The specimens used in this work consist of FeO phase with a dissolved part of added oxides, Fe-Ca olivine and dicalcium-silicate. At temperatures below 1100°C, reduction of FeO is accelerated by the presense of SiO2 and/or CaO dissolved in a small amount, and affected slightly by Fe-Ca olivine and dicalciumsilicate.
At temperatures above 1200°C, reduction of FeO is not accelerated by the additives, but retarded by the formation of the layer of dense iron on wustite or by low reducibility of the oxide which are formed with reduction of the molten oxide which is formed from the complex oxides and a part of FeO phase.
