Abstract: A process and system for casting a billet of liquid metal. The liquid metal is cast into a casting die and drawn from the casting die as a billet having a solidified investment and a liquid core. The liquid metal level in the casting die is regulated to a predetermined reference value. Disturbance variables, which act on the liquid metal level in the casting die and which cause a deviation between the actual value and the reference value of the liquid metal level, are estimated, and the influence of the disturbance variables on the actual value of the liquid metal level is compensated or reduced using the estimated disturbance variables.

Abstract: A method and a device for casting a strand from molten metal is presented. The molten metal is poured into a mold and then pulled out of the mold as a strand having a liquid core characterized by a solidified shell and a tapering liquid pool. The pouring level associated with the rate at which the liquid metal is poured into the mold is regulated by determining the pouring level and influencing the inflow of liquid metal into the mold by means of a controller whose control parameters are adapted on-line, by means of fuzzy techniques, to any change in the parameters of the controlled system corresponding to the pouring apparatus and the mold.