METHOD OF RECOVERING VALUES FROM ALUMINIUM DROSS
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United States of America Patent
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Jun 11, 2015
app pub date -
May 27, 2013
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May 25, 2012
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Abstract
The invention concerns a Method of recovering values from aluminum dross comprising the steps of: a1) dissolving the aluminum dross in water thereby forming a salt solution, NH3 containing gas, and solid residues; b1) separating the NH3 containing gas; and c1) reacting the NH3 containing gas with CO2 in CO2 containing water saturated to at least 20% of maximum CO2 saturation to form ammonium carbonate and/or ammonium bicarbonate. According to another embodiment, the method comprises the steps of: a2) dissolving the aluminum dross in CO2 containing water saturated to at least 20% of maximum CO2 saturation, thereby forming a salt solution, and solid residues; and b2) separating the solid residues from the salt solution.
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