Method of processing non-ferrous smelting intermediates containing arsenic
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United States of America Patent
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Jan 10, 2012
Grant Date -
Aug 5, 2010
app pub date -
Jul 11, 2008
filing date -
Aug 9, 2007
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Abstract
To extract arsenic from intermediates containing arsenic, to outside the system in stable form. A method of processing non-ferrous smelting intermediate containing arsenic in sulfide form and a non-ferrous smelting intermediate containing arsenic and copper as metal; a solution adjusting step of adding an oxidation agent to the leaching solution to oxidize trivalent arsenic to pentavalent arsenic and obtain an adjusting solution; and a crystallization step of converting arsenic in the adjusted solution to scorodite crystals.
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