Building a macro and micro model of multistage process is considered using the decomposition method, dividing general technological system into interconnected control loops. A procedure for constructing an integrated material balance equations each loop, two-level mathematical complex system, developing principles modeling systematizing element models, degree aggregation, in general, controllin...

Spherical pellets of antimony sulphide were dissolved in 1 molar sodium hydroxide solutions at different temperatures. It was found that the shrinking core with ash layer model could satisfactorily explain the dissolution process. Using this model it was found that initially the rate controlling step is a chemical reaction with activation energy of 10.2 kJ/mol. As the ash layer builds up, diffu...