Steelmaking process using direct reduction iron

Details Steelmaking process using direct reduction iron Steelmaking process using direct reduction iron

1997-07-22

1999-08-31

Hoang, Tu Ba

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

373 75, F27D 112

Patent

active

059463392

ABSTRACT:
A method and apparatus for producing crude liquid steel using direct reduced iron as a raw material in an electric arc furnace with an acid resistant sidewall refractory lining. In order to effect the more economical melting operation, the electric arc furnace uses a slag containing a B4 ratio of (lime+magnesia)/(silica+alumina) in the range of about or less than 1.50, resulting in less slag volume, reduced electric power consumption, reduced electrode consumption, and improved iron yield.

REFERENCES:
patent: 3832478 (1974-08-01), Books
patent: 3973076 (1976-08-01), Scott, Jr. et al
patent: 3994676 (1976-11-01), Strimple et al.
patent: 4468780 (1984-08-01), Schellberg et al.
Carbon Steel from Prereduced Pellets-Acid Practice, Report of Investigations 7981, by W.L. Hunter, J.E. Tress, and W.A. Stickney, Washington, U.S. Bureau of Mines, 1974, 10 pages.
Cotinuous Charging and Preheating of Prereduced Iron Ore, Report of Investigations 8004, by J.E. Tress, W.L. Hunter, and W.A. Stickney, U.S. Bureau of Mines, 1975, 14 pages.

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