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Recovery Of Placer Gold Using The Knelson Concentrator

L.A. Meza S. W. Hartmann, C.A. Escobar
Presented at IIMP June 1994, Medellin, Colombia

March 19th, 1999

The recovery of alluvial gold was studied using 3 and 7.5 inch Knelson Concentrators applied to four kinds of sands coming from Bajo Cauca and El Bagre, Antioquia, Colombia. Gold recoveries of over 98-99% were obtained from the three-stage tests under the following operating conditions: pulp dilution, 3:1; particle size range, -10+20, -20+65 and -65 Tyler mesh; and a water pressure of 3 to 5 psi with an average of 4 psi.
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Recovery of Placer Gold using the Knelson Concentrator
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