KR1020107009802

i) receiving measurements of at least one process variable reflecting the melting process,

ii) determining a current state of the melting process based on a model of the melting process, a previous state of the melting process, a previous control input, and the measu rements of the at least one process variable,

iii) determining a current process input which minimizes a desired process property, wherein the determining comprises minimizing the desired process property with respect to all allowed values of process inputs and utilizing constraints involving the current state of the melting process and a desired end state of the melting process,

iv) controlling the melting process utilizing the current process input to control an electromagnetic stirrer, and

v) repeating steps i) to iv) until the desired end state of the melting process has been obtained.