Recovery of non-ferrous metals from by-products of the zinc...

Details Recovery of non-ferrous metals from by-products of the zinc... Recovery of non-ferrous metals from by-products of the zinc...

2011-03-15

2011-03-15

Wyszomierski, George (Department: 1733)

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

C075S010220, C075S010300, C075S010450, C075S010460

Reexamination Certificate

active

07905941

ABSTRACT:
This invention relates to a single-step pyrometallurgical process for the recovery of non-ferrous metals from zinc bearing residues, in particular from by-products of the zinc and lead industry such as goethite and jarosite. A process for the recovery of metals from industrial Zn residues containing Zn, Fe and S is defined, wherein Zn is fumed, Fe is slagged, and S is oxidized to SO2, characterized in that the Zn fuming, the Fe slagging, and the S oxidation are performed in a single step process, by smelting the residues in a furnace comprising at least one submerged plasma torch generating an oxidizing gas mixture, and by feeding a solid reducing agent to the melt. The process achieves the oxidation of S and the slagging of Fe, while simultaneously achieving the reduction and the fuming of metals such as Zn.

REFERENCES:
patent: 4072503 (1978-02-01), Peterson et al.
patent: 4487628 (1984-12-01), Bjo/ rling
patent: 2007/0095169 (2007-05-01), Van Camp et al.
patent: 2094353 (1982-09-01), None
patent: WO 2005/031014 (2005-04-01), None
International Search Report, issued in PCT/EP2007/009023, dated Feb. 14, 2008.
International Preliminary Report on Patentability, issued in PCT/EP2007/009023, dated Feb. 11, 2009.

Affiliated with

Also associated with

Rating

Recovery of non-ferrous metals from by-products of the zinc... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recovery of non-ferrous metals from by-products of the zinc..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of non-ferrous metals from by-products of the zinc... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2732286