ROLL CASTING METHOD WITH CRYOGENIC COOLING OF THE CASTING ROLLS

摘要

A molten metal (4) is poured into a mold region (1) which is delimited on at least one side by a first casting roll (2) that rotates about a first rotational axis (3). A metal strand (4') which is produced by the solidification of the molten metal (4) is conveyed out of the mold region (1). A liquid coolant (7) is applied to the surface of the first casting roll (2) by a first cooling device (5) by means of a number of first coolant applying devices (6). The coolant (7) is fed to the first coolant applying devices (6) via first coolant lines (8). The coolant is inert with respect to the molten metal (4), said coolant having a standard boiling point below 20 °C, in particular below -20 °C, with respect to a normal air pressure, and an operating temperature which lies at an operating boiling point or lower. The operating boiling point relates to an operating pressure (p) at which the coolant (7) is supplied. An actual property of the first casting roll (2) or an actual property of the metal strand (4') is detected by means of at least one sensor (15). The actual property is fed to a control device (14) of the first cooling device (5). The control device (14) automatically ascertains a control state of the first cooling device (5) dependent on the actual property fed to said control device and a corresponding target property and controls the first cooling device (5) in a corresponding manner.