Method and apparatus for coating iron-bearing particles to...

Details Method and apparatus for coating iron-bearing particles to... Method and apparatus for coating iron-bearing particles to...

C - Chemistry, Metallurgy

22

B

C22B 1/243 (2006.01) C21B 13/00 (2006.01)

Patent

CA 2059250

PATENT CMS FILE NO. 120194-3900 (124607) ABSTRACT OF THE INVENTION 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 discharge pipe. 194-HYL3:3900-2.APL

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