Abstract
The dissolution kinetics of solid cylinders of titanium in liquid steel has been studied. Two separate dissolution periods were identified: asteel shell period anda free dissolution period. During thesteel shell period a customary shell of frozen steel encased the cylinder following its initial immersion. Premature internal dissolution then began as a result of liquid eutectic forming at the inner steel shell boundary.This phenomenon triggered an exothermic dissolution of the inner surface of the steel shell. The net result was to shorten considerably shell melting times. In the second,or free dissolution period it was found that the surface temperature of the exposed titanium cylinder rose above the bath temperature as a result of continued exothermic dissolution phenomena. This caused the dissolution process to become self-accelerating. A simplified mathematical model of the process has been developed to describe the complex coupled heat and mass transfer phenomena involved.
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