ON THE RATE OF SOLIDIFICATION, VARIATION OF MOLTEN METAL COMPOSITION AND SCUM DURING SOLIDIFICATION OF RIMMINGSTEEL INGOTS
1951 Volume 37 Issue 10 Pages 503-511
Details
1951 Volume 37 Issue 10 Pages 503-511
(1) The rate of solidification of rimming-steel ingots is represented by the next formula.
d=0.50+0.9t (d=in., t=min.)
(2) During solidification the S, P, C and Mn of molten metal increase gradually, but the O2 decreases. The rate of increase is affected by evolution of gases; and the C and O2 content of molten metal approach to the equilibrium value rapidly and then vary in the equilibrium state approximately.
(3) The composition of scum is FeO (20-30%), MnO (45-55%), SiO2 (10-20%) and Al2O3 (5-10%) and similar to that of acid slag. The FeO in scum is larger than the equilibrium value computed by the O2 in molten metal, but the MnO is approximately in equilibrium with the Mn in metal.
