Multi-Criteria Optimization of the Quality Indicators of Steel Foundry Ladles, Based on Priorities and Weighting Coefficients of the Indicators

In the present study, the significance of the quality indicators of “Fosuk” type driving masses used for the monolithic construction of the walls of the steel foundry ladles used in steel production was determined by rank correlation method. Six quality indicators of driving masses were studied: linear changes, open porosity, compressive strength, beginning of deformation, 4% deformation and 40% deformation. The three most significant indicators of driving masses “Fosuk” type have been determined. A multi-criteria optimization was performed, using a genetic optimization algorithm, the set of fifty Pareto-optimal solutions (Pareto-front) were found in the two-dimensional space of the control parameters within their range limits. A multi-criteria analysis was done by using fractional-rational generalized functions of usefulness in order to determine the optimal content of clay substances (Al2O3) and the temperature of heat treatment of the inner lining of the steel foundry ladles.