Abstract When smelting with 18.5% MgO slag the furnace runs smoothly with stablehearth temperature. The desulphurizing power of high-MgO slag is comparativelylower. To raise the total basidity ((CaO+MgO)/(SiO_2)) is required. This thesis aims at analyzing the cause of higher coke consumption. Theore-tical calculation shows, if dolomite is used directly as furnace charge, the totalamount of CO_2 (per ton pig) carried into the furnace is raised by 15%, thuscausing an increase of % direct reduction and consequently an increase of cokeconsumption. Dolomite ought to be used as sinter charge.
[1] Melvin E. Nickel, Experience in the Use of High MgO Slags, Proceedings Blast Furnace, Coke Oven and Raw Materials Conference, 1946． [2] 潘作桓,高氧化镁渣试验初步总结,鞍钢,№26,1953． [3] 高氧化镁渣试验初步总结,鞍钢试验报告,1955(由本文作者总结)。 [4] Richard S. McCaffery, Viscosity of Blast furnace Slags, Tecnical Publication, № 383, 1931． [5] 关于高炉渣试验研究的初步总结,鞍钢与中国科学院工业化学研究所合作,1953． [6] М. А. Павлов, 1949, 140--141． [7] T. L. Joseoh, Relative Desulphurizing Powers of Blast Furnace Slags, Trans., A. I. M. E., 120, 1936． [8] И. П. Семик, 1949, № 4． [9] А. Н. Рамм, 1954, № 12． [10] А. М. Банных, 1955, № 11．
