Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1991-01-14
1993-01-26
Beck, Shrive
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
427216, 427421, 427427, 118300, 118303, 239143, 239379, 428404, C21B 1300
Patent
active
051819546
ABSTRACT:
At least a percentage of iron ore pellets and the like for use in a direct reduction process for the production of sponge iron are coated with a thin porous coating of Portland cement to counteract tendency to aggregate. This is accomplished by method and apparatus that mixes water and cement powder at the point of delivery in a manner such that no pumps are subjected to a wet cement slurry. The slurry is mixed and maintained in suspension by air agitation in a bin and then flowed through a bin discharge pipe and sprayed therefrom onto a passing layer of pellets in a controlled manner by regulated air injection into the discharage pipe.
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Berrun-Castanon Jorge D.
Guerra-Reyes Maria T.
Ruiz-Leal Leopoldo I.
Beck Shrive
Hylsa S.A. de C.V.
Owens Terry J.
S. Safford A. Thomas
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