Carbon retention screen with variable discharge head
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United States of America Patent
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Oct 8, 2013
Grant Date -
Dec 30, 2010
app pub date -
Jun 23, 2010
filing date -
Jun 26, 2009
priority date (Note) -
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Abstract
A carbon adsorption vessel for use in a CIP (carbon in pulp) or CIL (carbon in leach) process may be constructed. A slurry is obtained having dissolved (leached) precious metals. The slurry is brought into contact with carbon particles and is passed through a retention screen in the vessel. The dissolved precious metals adhere onto the carbon particles. An air lift pump provides the pressure differential necessary to drive the slurry through the retention screen, wherein the carbon particles are retained by the retention screen and the slurry passes through the retention screen. After passing through the retention screen, the slurry is received in to a receiving vessel that may be situated at, below or above the level of source vessel.
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