Treatment of steel mill waste metal oxides

Details Treatment of steel mill waste metal oxides Treatment of steel mill waste metal oxides

1998-03-25

2000-09-19

Warden, Jill

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75504, 75656, 75695, 75961, C21B 1108, C22B 1904, C22B 1306

Patent

active

06120577&

ABSTRACT:
A process of recovering iron values and separating zinc oxides and other contaminants from steel mill waste metal oxides, such as blast furnace dust, BOF dust, mill scale and oily sludges, characterized by iron metallization levels up to 95% or more and zinc oxide removal in excess of 99%, and including the steps of blending the oxides with coke breeze in an amount sufficient to provide a total carbon content of 16% to 22%, the coke breeze having a particle size of 50% or more plus 60 mesh or larger, briquetting the blend to form briquettes having a thickness ranging from 1/2" to 3/4", and firing the briquettes in a rotary hearth furnace to metallize the iron and evolve zinc and other oxide contaminants.

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Database WPI, Section Ch, Week 9209, Derwent Publications Ltd., London, GB; Class M24, AN 92-071150 XP002107989 & SU 1 638 176 A, (Ferrous Metallurg Bardin), Mar. 30, 1991 *abstract*.

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