Process for cooling a continuously cast strand of metal...

Details Process for cooling a continuously cast strand of metal... Process for cooling a continuously cast strand of metal...

B - Operations, Transporting

22

D

22/185

B22D 11/124 (2006.01)

Patent

CA 1201273

A B S T R A C T A continuously cast strand or ingot of metal is cooled as it emerges from the mold by applying a coolant directly to the surface of the strand. In order to prevent distortion at the foot of the ingot due to too abrupt cooling, polymers of molecular weight 104 - 108 are added to the coolant at least during the initial phase of casting. By the addition of poly- mers to the coolant the kinetics of formation and discharge of vapour bubbles as the coolant strikes the ingot surface are significantly altered due to the reduction in the surface tension of the coolant; as a result of this an insulating film of coolant vapour forms on the surface of the ingot thus reducing the heat flow from the ingot. - 1 -

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