Method for processing anode sludge
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United States of America Patent
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Jun 8, 2010
Grant Date -
Mar 22, 2007
app pub date -
Aug 31, 2004
filing date -
Sep 23, 2003
priority date (Note) -
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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.
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