Justification of the interroll gap of roll crushers with corrugated working bodies

The quality of fractional preparation of solid fuel, implemented in agglomeration production using roller crushers, depends on many factors, one of which is ensuring the required interroller gap in the process of crushing the material, for the substantiation of which a mathematical model of a roller crusher with corrugated rolls has been developed. Formulas are proposed for determining the forces acting on the working surface of the corrugated roll in the process of crushing the material, on the basis of which a dependence is obtained for the preliminary tightening of the spring set of the shock-absorbing device of the roller crushing machine to ensure the required gap in the crushing process. According to the technological requirements of the agglomerate sintering process, recommendations are given for preliminary adjustment of the shock-absorbing device of the upper corrugated rolls of the four-roll crusher CFS 900×700, used in the agglomeration shop of LLC «SMMC» for fractional preparation of blast-furnace coke and dry-quenching coke. According to the results of preliminary tests in the process of fractional preparation of solid fuel in the crusher CFS 900×700 using the recommended operating parameters for adjusting the inter-roll gap, it was found that the content of undesirable small –0,5 mm and large +3,0 mm fractions in the finished product decreased by 6,5% and 4,5%, respectively.