Metallurgical apparatus – Means for extracting and refining metal – With separate refining zone
Patent
1989-08-30
1991-10-29
Andrews, Melvyn J.
Metallurgical apparatus
Means for extracting and refining metal
With separate refining zone
266175, 266182, 266186, 266193, 266195, 266230, C21C 500
Patent
active
050609130
ABSTRACT:
A smelting reduction process is carried out in a smelting reactor which includes a central internal carburization/combustion plenum or chamber in which hot metal is carburized by the injection of coal fines and heated by post combustion of the coal gases. The chamber has outlets to the first zone of an outer coaxial annular channel where the coal slag is separated off and a carburized hot metal passes into a second zone or smelting channel-chamber that permits introduction of feed material into a molten metal. A majority of the material that passes through the smelting channel-chamber is recycled to the internal carburization/combustion chamber for further processing. The internal carburization/combustion chamber and the smelting channel are completely separate so that the slag and the off gases from the two processes can be kept separate as well. The channel is positioned around the circumference of the internal carburization/combustion chamber where active heating occurs to form a compact reactor.
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Andrews Melvyn J.
Regents of the University of Minnesota
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