Merkulov O. The development of the theoretical foundations for improving blast furnace smelting using a system analysis of the relationship of parameters with the performance indicators of a real process

Blast furnace technology. Development of rational modes of blast-furnace smelting technology for various gas-blowing parameters, charge composition, uneven distribution of materials, based on a comprehensive calculation of the zonal and integral characteristics of the blast-furnace process, providing for the disclosure of the entire completeness of internal connections that affect the nature of smelting modes and the final results (coke consumption and productivity) ... Mathematical modeling, experimental research and industrial tests of the developed technical solutions were used. Along with the clarification of the influence of the balance factors of coke saving, which determine the main value of the reduction in heat consumption, the significant influence on the consumption of coke of the nature of heat and mass transfer, phase transformations, gas mechanics and distribution of materials and gases in the furnace, connected by direct and feedback with the consumption of coke, was quantitatively estimated. The revealed regularities of transformation of temperature-concentration, phase and gas-dynamic fields in the volume of a blast furnace, as well as transverse gas flows along the height of the charge column. A complex system of direct and feedback parameters of the zone of softening and melting, as well as heat losses through walls with a complex of input, intermediate and output parameters of blast furnace smelting, which are an important component of the system analysis of smelting, has been established. Implemented at blast furnaces of LLC «Metinvestholding». Metallurgy.