Specialized metallurgical processes – compositions for use therei – Compositions – Solid treating composition for liquid metal or charge
Patent
1989-05-18
1990-07-17
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Compositions
Solid treating composition for liquid metal or charge
75312, 75310, 75565, C21C 702
Patent
active
049419145
ABSTRACT:
The desulfurization agent for molten iron is made up of 95 to 70% commercial calcium carbide, 30 to 5% calcium aluminate slag, and 10 to 0% of a metal oxide. The calcium aluminate slag is made up of 65 to 50% calcium oxide, 35 to 25% aluminum oxide, and 12 to 3% calcium fluoride. The metal oxides are ferric oxide, manganomanganic oxide and ferrosoferric oxide. The desulfurizing agent has been found to reduce the amount of calcium carbide in the resulting slag.
REFERENCES:
patent: 4076522 (1978-02-01), Yoshida
patent: 4260413 (1981-04-01), Freissmuth et al.
patent: 4279643 (1981-07-01), Jackman
patent: 4417924 (1983-11-01), Schwer
patent: 4462823 (1984-07-01), Fontaine
patent: 4490173 (1984-12-01), Schwer
patent: 4541867 (1985-09-01), Neelameggham
patent: 4572737 (1986-02-01), Robinson et al.
patent: 4687512 (1987-08-01), Schrodter
patent: 4753676 (1988-06-01), Kodatsky et al.
patent: 4764211 (1988-08-01), Meichsner et al.
Kirk-Othmer--Encyclopedia of Chemical Technology--vol. 4, p. 508.
"Improved Calcium Carbide for Iron Desulfurization", R. W. Bartram et al.
"Hot Metal Desulfurization-N. American Experience with CaD", H. A. Corver et al., Iron and Steel Engineer, May 1980, pp. 53-55.
"The Activity of Iron Oxide in (CaO+CaF.sub.2 +SiO.sub.2 +Fe.sub.x O) Slags", M. J. U. T. van Wijngaarden et al., Transactions of the ISS, Feb. 1988, I&SM-49-56.
"The Kinetics of Sulfur Transport Between Slag and Molten Iron Droplets", W. N. Bargeron et al., AFS Transactions, pp. 303-310.
"Slags and Fluxes for Ferrous Ladle Metallurgy", E. T. Turkdogan, Iron and Steelmaking, 1985, vol. 12, No. 2, pp. 64-78.
"Desulfurization of Hot Metal with Burnt Lime", Tatsuo Ohya et al., Steelmaking Proceedings, 1977, pp. 90-97.
"Efficiency in Desulfurization Practices", W. A. Henning, Elkem Metals Company, Jun. 6, 1986.
"Hot Metal Desulfurization by CO Injection of Calcium Carbide and Magnesium", Thomas Bieniosek, LTV Steel Company, pp. 349-356.
"Desulfurizing of Molten Iron Droplets While Floating on Slag Baths", W. N. Bargeron, P. K. Trojan, R. A. Flinn, AFS Transactions, pp. 117-124.
Craig Donald B.
McCluhan Thomas K.
Elkem Metals Company
Rosenberg Peter D.
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