Westech Engineering, Inc.

Paste Thick Ventures, LLC

Jeffery H Easton

Philip Lake

Ralph A Cutler

Mark Crozier

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.

Carbon retention screen with variable discharge head

A feed system is used in a sedimentation vessel. The feed system includes an inlet for receiving a quantity of feed slurry and an outlet for delivering the feed slurry to a separation zone within the sedimentation vessel. The feed slurry includes a mixture of solids and liquids that are to be separated in a separation zone within the sedimentation vessel. An airlift pump is used to cycle at least a portion of either the separated solids or the separated liquids from the separation zone and return it to the feed system. This returned portion mixes with the feed slurry and may operate to dilute the feed slurry to a concentration for optimal separation. Additionally, feed conditioning chemicals may be mixed into the feed slurry prior to or after the mixing of the feed slurry with the returned portion of the separated products.

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Cottonwood Heights, UT, United States of America

Jeffery H Easton