ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Mechanism for Separating Inclusions from Molten Steel Stirred with a Rotating Electro-magnetic Field
Yuji MikiHidenari KitaokaToshikazu SakurayaTetsuya Fujii
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1992 Volume 32 Issue 1 Pages 142-149


An experimental model was constructed to clarify the mechanism for separating inclusions from molten steel strongly stirred with a rotating electro-magnetic field.
Molten steel was rotated and solidified in a crucible. The ingot obtained had its maximum oxygen content at the axis of rotation. The existence of this maximum area can be partly explained by the centripetal force acting on inclusions during rotation of the mnolten steel.
Many coagulating inclusion pairs were observed in the ingot, with the radii of the inclusions forming coagulating pairs being concentrated in the range from 10 to 50 μm. This phenomenon was explained using Saffman's model, which shows the probability of gradient collision between inclusions in turbulent eddies. This inclusion coagulation effect suggests the high deoxidation capability of rotating molten steel in an electro-magnetically stirred ladle.

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