Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1988-12-06
1990-01-02
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 26, 75 38, 266 47, 266 83, 266172, 266270, F27D 1900, C21B 1314
Patent
active
048910627
ABSTRACT:
Described is a method for operating a melt-down gasifier(4) in which iron-ore-containing charge materials or iron sponge obtained from same by direct reduction are smelted due to the addition of carbon carriers and blowing an oxygen-containing gas through oxygen nozzles (6) into a fluidized bed created by same, and are (further) reduced to make liquid pig iron or steel starting material. On failure or reduction of the oxygen supply below a predetermined quantity and on failure of the water cooling system of the oxygen nozzles, the still present oxygen supply is cut-off and an inert gas is fed into the melt-down gasifier through the said oxygen nozzles instead, for protecting said oxygen nozzles. Thus, liquid fluidized bed matter is prevented from penetrating into the oxygen nozzles and to solidify in same. In the case of failure of the water cooling system of the oxygen nozzles, the inert gas serves also at the same time as cooling medium.
REFERENCES:
patent: 4047937 (1977-09-01), Kolb et al.
patent: 4396421 (1983-08-01), Stift et al.
Andrews Melvyn J.
Deutsche Voest-Alpine Industrieanlagenbau GmbH
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