General Aspects of Roll Cooling for Hot and Cold Rolling Mills

by UBERTUS WENIG

Publisher - Lechler GmbH

Category - General Novel

The paper describes how heat is generated in the roll gap, and how roll cooling should be applied on the rolls in the best manner. In many cases roll cooling goes along with lubrication. The characteristics of the various coolants used for roll cooling are explained with regard to cooling and lubricating effects. Depending of the type of rolling mill, dedicated roll cooling systems are required to fulfill the required functions. Examples are suitable roll cooling and lubrication systems to fully utilize the advantages of HSS rolls in hot strip mills, and selective roll cooling systems as a method to control the flatness of the strip in cold rolling mills. Cooling and lubricating is furthermore essential for the plate-out for cold rolled strip. Typical methods how to apply coolant onto the rolls are described and discussed. Various nozzle types and their characteristics such as cooling effect, lubrication and coolant distribution are described. Good roll cooling requires spray pattern engineering, the selection of suitable nozzles in combination with an optimum arrangement.

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