Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1979-04-26
1981-02-03
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
C21B 500
Patent
active
042486246
ABSTRACT:
An improved method for operating a blast furnace wherein a portion of the charge is prereduced iron ore with a relatively low metallization in the range of 75% to 90% and a relatively high carbon content in the range of 1.5% to 4.5% by weight. The composition of the sponge iron is selected so as to realize an increase in the production of pig iron and a decrease in the consumption of coke while simultaneously maximizing the over-all economy and efficiency of the blast furnace operation. In a preferred embodiment of the invention at least 80% by weight of the carbon content in the sponge iron used as a portion of the charge to the blast furnace is in the form of ferric carbide.
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patent: 1991008 (1935-02-01), Brassert
patent: 2778018 (1957-01-01), Strassburger
patent: 3218155 (1965-11-01), Strassburger
patent: 3282678 (1966-11-01), Melcher et al.
patent: 4046556 (1977-09-01), Celada et al.
patent: 4111687 (1978-09-01), Syska
Esparza et al. Latin American Institute of Iron & Steel, (ILAFA), pp. 359 to 367, Aug. 1978.
Graff et al., Journal of Metals, pp. 389 to 394, Apr. 1965.
Maschlanka et al., Metallurgical Plant and Technology, pp. 13 to 20, Feb. 1978.
Novoa Jorge O. B.
Ramirez Julian S.
Andrews M. J.
Hylsa, S.A.
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