Method for the continuous smelting of high-purity steel

Details Method for the continuous smelting of high-purity steel Method for the continuous smelting of high-purity steel

C - Chemistry, Metallurgy

21

C

53/47

C21C 5/52 (2006.01) C21B 13/12 (2006.01) C22B 9/18 (2006.01)

Patent

CA 1091933

ABSTRACT A method for the continuous smelting of high purity steel, especially steal having a very low carbon content, comprises smelting the steel in an enclosed electric low-shaft furnace while maintaining over the molten metal a constant cover of slag in which the electrodes are immersed, wherein (1) the pre-reduced material has a carbon:oxygen ratio of at least 1:1.4; (2) the layer of slag has a degree of foaming (as herein defined) of be- tween 1.2 and 5.0; and (3) wherein the slag used as a basic slag (CaO/SiO2) having an FeO content of between 7% and 30% and an MgO content of between 5% and 12%.

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