抄録
The effect of mill scale addition into molten iron was investigated in comparison with the oxygen blowing process as reported previously (Tetsu-to-Hagane, Vol. 41, 1955, No. 4, p. 407). The scale Was added at the high temperature (about 1450°C)into molten iron to decrease the undesirable effect of oxidation. As the results, it was found that by the treatment of adequate scale addition into molten iron the amount of Ti, and V in the iron decreased and so even the unsuitable irons as rnaterials for ductile cast iron were easily nodulized by magnesium treatment after the scale addition, as well as in the case of oxygen blowing treatment. And also found that the above effects of the scale addition were inferior in comparison with the case of oxygen blowing treatment in which the temperature of molten iron rose remarkably.
