DEVELOPMENT OF CRITERIA FOR EVALUATING STEEL REFINING PROCESSES USING INTERATOMIC INTERACTION PARAMETERS IN MELTS

Abstract

To evaluate the efficiency of steel refining processes, the results of the physicochemical interaction of elements in the metal-slag system of ten steel grades smelted in modern conditions in Ukraine were analysed. As a result of the analysis of the patterns of changes in the distribution coefficients of sulphur and phosphorus depending on the chemical composition of steel and slag, physicochemical criteria for assessing the degree of completeness of ion exchange processes during steel dephosphorisation and desulphurisation have been developed using integral parameters of interatomic interaction in melts. Along with the use of integral physicochemical parameters of the chemical and charge state of the system ZY, e and Ze, the key role of the influence of the "recharge" parameter of the element ∆Ze on the process of sulfur and phosphorus distribution between metal and slag is shown and its use as a criterion for assessing the degree of deviation of the system from equilibrium is substantiated.