Method for processing anode sludge

Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C075S714000, C423S022000, C423S027000

Reexamination Certificate

active

07731777

ABSTRACT:
The invention relates to a hydrometallurgical method for separating the precious metals and impurities of anode sludge obtained from copper electrolysis. According to the method, anode sludge copper is separated in atmospheric leaching; calcinated in two steps for separating selenium and for sulfatizing silver; the sulfatized silver is separated by leaching into a neutral aqueous solution, from which it can be separated by reduction or by extraction.

REFERENCES:
patent: 2039256 (1936-04-01), Martin et al.
patent: 3944414 (1976-03-01), Yanagida et al.
patent: 4002544 (1977-01-01), Heimala et al.
patent: 4047939 (1977-09-01), Morrison
patent: 4094668 (1978-06-01), Yannopoulos et al.
patent: 4389248 (1983-06-01), Iio et al.
patent: 4473396 (1984-09-01), Hyvarinen et al.
patent: 59104439 (1984-06-01), None
patent: 10280059 (1998-10-01), None
patent: WO 01/083835 (2001-11-01), None
O. Hyvarinen et al, Selenium and precious metals recovery from copper anode slimes at Outokumpu Pori Refinery, in Precious Metals: Mining, Extraction and Processing, 1984, p. 537-548.
J. Hait et al. Some studies on sulfuric acid leaching of anode slime with additives. Ind. Eng. Chem. Res. vol. 41, Nov. 13, 2002, p. 6593-6599.
M.H.H. Mahmoud, Leaching platinum-group metals in a sulfuric acid/chloride solution. Journal of Metals, Apr. 2003, p. 37-40.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method for processing anode sludge does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for processing anode sludge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for processing anode sludge will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4234954

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.