Metallurgical dust reclamation process

Details Metallurgical dust reclamation process Metallurgical dust reclamation process

2008-07-15

2008-07-15

King, Roy (Department: 1793)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

C075S743000, C075S961000

Reexamination Certificate

active

07399454

ABSTRACT:
Improved methods for treating metallurgical compositions involve reacting a metallurgical composition with an aqueous nitric acid solution. The reaction is performed at a pressure of at least about 220 psig and at a temperature of at least 100° C. The metallurgical composition comprises iron and one or more non-ferrous metals. The reaction dissolves the majority of the non-ferrous metal compositions into the solution which is in contact with solid ferric oxide. The reaction can be repeated on the isolated solids to increase the purity of ferric oxide in the solids. Zinc can be removed from the mixed metal solutions obtained from furnace dust by a variety of separation techniques.

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