Abstract
Agglomeration of alumina inclusions in the molten steel is investigated through the free energy analysis of the cavitation between inclusions. The mechanism of agglomeration, the activation state, the stable state, the equilibrium state, and the critical separation for the cavitation are discussed. The equilibrium energy is proportional to the square of the inclusion radius, EEq = 0.710R P 2 , while the critical separation is directly proportional to the inclusion radius, dC = 0.146RP. Agglomerates of micron inclusions are hardly broken up by the turbulence in steelmaking practice.
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