Process for operating a blast furnace

Details Process for operating a blast furnace Process for operating a blast furnace

1981-03-24

1983-12-20

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 60, C21B 400

Patent

active

044215533

ABSTRACT:
In a method of controlling a blast furnace wherein iron ore is reduced to form pig iron and there being at least one reactor used for heating a reducing gas which reducing gas is introduced to at least one tuyere, the improvement being the steps of adjusting the composition and the temperture of the reducing gas in order to control at least one of the following: coke rate, productivity of the blast furnace, temperature and/or silicon content of the pig iron, and temperature of the top gas. Preferably, the reactor is a plasma torch and the temperature of the reducing gas is in the range of 1500.degree.-2800.degree. C. The coke rate is predetermined at a value of 50-350 kg/mt of pig iron and preferably at 80-200 kg/mt of pig iron produced.

REFERENCES:
patent: 3719811 (1973-03-01), Munson
patent: 3853539 (1974-12-01), Yoshiki
patent: 4227921 (1980-10-01), Matoba
patent: 4273577 (1981-06-01), Fujita
AIME-Operation of a Blast Furnace with Super Hot Reducing Gas, Ponghis et al., pp. 224-229, Mar. 1979.

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