Fractional melting process involves heating an alloy within its liquid-soli
d region simultaneously ejecting liquid from the solid-liquid mixture. The
extent of the purification obtained is comparable to that obtained in multi
-pass zone refining. The fractional melting process in which the centrifuga
l force was used for separating the liquid from the mixture has been develo
ped. The refining behaviors of the present F.M. process were analyzed quant
itatively using the new parameter called "the refining partition coefficien
t, k'". The effects of the process parameters such as a rotating speed and
a heating rate on the coefficient, k' and the refining behaviors were also
studied.