METHOD OF BLAST-FURNACE SMELTING Russian patent published in 2002 - IPC

FIELD: ferrous metallurgy; blast-furnace process; improvement of stability of drainage of liquid products f melting in coke checker and in hearth due to central of high-temperature properties of heterogeneous slag. SUBSTANCE: method includes loading of charge, change of its consumption and composition, check of composition of slag and determination of viscosity of homogeneous slag, determination of quality of coke by standard index of "hot" strength (CSR)% and degree of slag heterogeneity (γ)% according to dependence γ = A(100-CSR)%, where A is specific amount of fines of fraction up 3 mm in coke; estimation of actual viscosity of heterogeneous slag ((η)) Ns/sq.m is performed by the following formula: where η_g - is viscosity of homogeneous slag, N. s/sq. m; FeO, MnO - content of FeO and MnO in homogeneous slag, %; viscosity of homogeneous slag is regulated through change of quality of coke, composition of charge and its consumption. EFFECT: reduced consumption of coke. 2 cl, 3 dwg, 2 tbl