Abstract
This report presents the elucidation on the reaction of magnesia refractory on molten iron and the refractory transmutation during the deoxidation of iron, based on the investigation of the oxygen concentration in iron melted in magnesia crucibles under Ar atmosphere and reduced pressures, and the examination of the refractory. The results obtained are the various time-dependent behaviors of dissolved oxygen according to differences in crucibles and environmental conditions, together with the growth of the refractory grains, and the particular transmutations of crucibles as to the deoxidation. The successful explanation of these results can be also discussed on the reasonable assumptions.
