Effect of Converter Slag Consumption on Blast Furnace Operating Indices

Аннотация

Results are provided for calculation of the predicted blast furnace operating regime using converter slag in the iron-ore part of the charge without implementing additional measures with the aim of evaluating its effect on process indices. Introduction into a blast furnace charge of fractionated converter slag may be performed in order to increase slag magnesia content and to use it as a basic for flux for increasing the proportion of pellets in a charge of an individual furnace without changing the prescribed sinter basicity for the whole workshop. An increase is provided in gas permeability of the dry part of a charge for a furnace with a limited upper zone in the case of distortion of its profile. Charging converter slag into a blast furnace gives rise to an increase in iron phosphorus content. Prolonged use of converter slag in all blast furnaces gives rise to accumulation of phosphorus in metal, and consequently to resolution of the problem of removing phosphorous during converter treatment. The choice of the ratio of charge components may be made by maintaining the iron content in a fluxed charge at a level relating to specifications of the technology and the task of providing an economic furnace regime. Solution of the question of the expediency of using converter slag in blast furnaces is possible with comprehensive analysis of the problem: evaluation of the economic expediency of its use as a fluxing additive; economic development of this question for a blast furnace – converter production complex; choice of a furnace operating regime in accordance with its operating conditions; analysis of the ecological problems of the operation of an enterprise and a region.