method for controlling surface profile of one or more rolling mill work rollers and cooling device for one or more rolling mill work rollers

摘要

patent summary: "method and cooling device". The present invention relates to a method of controlling a surface profile of one or more working rollers (8) of a rolling mill comprising supplying a cryogenic refrigerant (20) to a nozzle (23) at a substantially flow rate. constant; and controlling (58) a gas supply (57) to supply gas (24) to the cryogenic refrigerant. If the cooling power provided by the refrigerant on the surface of the working cylinder (8) is greater than the required cooling, the gas supply to the refrigerant is controlled so that liquid refrigerant (20) is atomized (27) by the gas. before being sprayed from the nozzle on the work cylinder surface. If the cooling power supplied by the refrigerant on the working cylinder surface is less than the required cooling power, the gas supply is controlled so that the refrigerant (20) is supplied from the nozzle as a liquid (26 ) to the surface of the work rollers.