Abstract
A mathematical model is constructed to describe the coagulation of nonmetallic inclusions and their removal from steel in a large pouring ladle. It is established that the mechanism of flotation by bubbles of inert gas effectively removes only the relatively large inclusions. The feasibility of removing nonmetallic inclusions in steel by treating it with calcium depends on the state of aggregation of the inclusions. In order to efficiently remove calcium aluminates by coagulation and flotation with bubbles of argon or vaporous calcium, the inclusions must be liquid and cannot be covered by a sulfide sheath.
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