Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1996-05-20
1998-11-17
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75450, 423439, 266172, C22B 514, C01B 3130
Patent
active
058370315
ABSTRACT:
An apparatus and method of producing iron carbide of predetermined quality is disclosed. The method of producing iron carbide (Fe.sub.3 C) comprises reducing and carburizing an iron-containing raw material containing iron oxides (e.g., hematite) or iron hydroxides as main components, wherein the raw material is partially reduced to a reduction ratio of 50 to 65% by a gas containing mainly hydrogen in a first stage of the reaction process, then the partially reduced raw material is further reduced and carburized with a gas containing mainly hydrogen and methane in a second stage of the reaction process to provide iron carbide.
REFERENCES:
patent: 4720432 (1988-01-01), Van Slyke et al.
patent: 4885211 (1989-12-01), Tang et al.
patent: 5061569 (1991-10-01), Van Slyke et al.
patent: 5104740 (1992-04-01), Shinkai et al.
patent: 5137566 (1992-08-01), Stephens, Jr. et al.
patent: 5256945 (1993-10-01), Imai et al.
patent: 5346772 (1994-09-01), Akiyama et al.
patent: 5366897 (1994-11-01), Hager et al.
patent: 5387274 (1995-02-01), Dam et al.
patent: 5458977 (1995-10-01), Hosokawa et al.
patent: 5618032 (1997-04-01), Meissner et al.
Gonnda, "Iron carbide is now being remarkable as a source of iron," Tekkokai, 43, No. 7, pp. 40-44 (1993) Jul.
Geiger, "The potential for use of iron carbide as an electric furnace raw material," 16th Advanced Technology Symposium ISS-AIME Alternate Iron Sources for the Electric Arc Furnace May 2-5, 1993, Myrtle Beach, SC, pp. 1-18.
Swanson, "Iron carbide, a possible replacement for premium quality scrap," Preprint No. 93-28, Presentation at the SME Annual Meeting at Reno, Nevada, Feb. 15-18, 1993, pp. 1-7.
"Role of iron ore supplier in scrap substitute process development," Iron & Steel Scrap, Scrap Substitutes and Direct Steel-Making, at Atlanta Airport Marriott, Atlanta, Georgia, U.S.A., Mar. 21-23, 1995, Povoa, Francisco, p. 13.
Nakagawa et al., "Effects of porosity of iron ore on the synthesis of cementite," Current Advances in Materials and Processes, vol. 7, No. 1, p. 85 (1994), Mar.
Hayashi et al., "Synthesis of iron carbide from iron ores in a fluidized bed," Current Advances in Materials and Processes, vol. 8, No. 1, p. 111 (1995), Apr.
Hayashi et al., "Synthesis of iron carbide from iron ores," Current Advances in Materials and Processes, vol. 8, No. 1, p. 110 (1995) Apr.
Nakagawa et al., "Effects of gas composition and temperature on syntehsis of cementite," Current Advances in Materials and Processes, vol. 8, No. 1, p. 109 (1995), Apr.
Mori et al., "New iron-making method and fluidized bed," Plant and Process, vol. 28, No. 6, pp. 99-108 (1986), Jun.
"Direct reduction processes existing and under development," T.P. McAloon, I&SM, Feb. 1994, p. 10.
Hess, "Dawn of the iron carbide age?" 33 Metal Producing, pp. 36,37,49, undated, Jan. 1995.
Iijima Satoru
Inoue Eiji
Miyashita Torakatsu
Nakatani Junya
Nakazawa Teruyuki
Andrews Melvyn
Kawasaki Jukogyo Kabushiki Kaisha
Mitsubishi Corporation
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