Perm National Research Polytechnic University (Russia):

Zatonskiy A. V., Doctor of Engineering Sciences, Professor, Head of Chair, zxenon2000@yandex.ru

Available software programs for modeling crushing, grinding and screening processes at concentrating plants (Bruno, USIM PAC, JKSimMet, MODSIM) are briefly characterized. Their advantages and drawbacks are noted. A method is proposed, permitting, by means of a small effort, to create adequate models of processing section circuits, distinguished by a presence of one main flow of processed material. The method is based on approximate identification of apparatuses and their elements by means of transfer function segments of the first order with a delay and a subsequent more precise definition through a statistical object identification with respect to residence time and delays relationship to main and auxiliary flows’ parameters. A potassium concentrating plant granulation section model was built, representing a sufficient precision of modeling. The model error, checked by means of the existing operation trends, amounted to 0.5 % in stationary mode for yield and did not exceed 4.7 % for all internal loops of the section. Relationships between main equipment loading and flow parameters deviation from designed values were studied, permitting to give recommendations for re-designing.

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