Specialized metallurgical processes – compositions for use therei – Compositions – Loose particulate mixture containing metal particles
Patent
1988-10-28
1990-03-20
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Compositions
Loose particulate mixture containing metal particles
75 53, 75 58, C21B 504
Patent
active
049098446
ABSTRACT:
A fused, hardened composition containing CaO, MgO and Al.sub.2 O.sub.3 for use in purifying molten metal during steel production and a method of making the same. The composition can be made up of electric arc furnace dust and lime or dolo-lime fines which would normally be wasted. The mixture of ingredients is hydrated, molded into a uniform size and carbonated using a CO.sub.2 containing gas and then heated so as to produce a molded non-dusting composition which dissolves quickly and uniformly in the slag process. Components such as PbO from the furnace dust which normally make slag a hazardous waste under environmental regulations, are reacted within the molded composition to form stable ceramic spinels. These spinels are not water soluble and therefore not subject to strict disposal requirements.
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