Inventors:
Peter J. Koros - Pittsburgh PA
Jagjit S. Bajaj - Murrysville PA
Valdis R. Daiga - Toledo OH
Vishwaprakash S. Hegde - Strongsville OH
Assignee:
LTV Steel Company, Inc. - Cleveland OH
Maumee Research and Engineering, Inc. - Perrysburg OH
USX Corporation - Pittsburgh PA
International Classification:
C21B 1108
C22B 1904
C22B 1306
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.