On the Deoxidation of Liquid Iron with Bubbles of Argon-Calcium Gas Mixture

To clarify the applicability of gaseous metal for the purification of liquid iron and steel, a study was made on the deoxidation with Ar-Ca gas bubbles floating up in iron melt. The present study will also give some informations on the behavior of complex deoxidizer containing calcium. The results obtained are as follows : (1) At 1550℃, the interaction parameters were e_0^=-535 and e_^=-1330, and the equilibrium constant for the reaction of [Cal + [O] =CaO was log K_=log a_a_0=-9.82. (2) The decrease in [O] was directly proportional to the amount of calcium added in the range of high oxygen content ([O]>150ppm) and was expressed by an exponential function of it in the range of low oxygen content ([O]