2018112· Centrifugal Gravity Concentrators. In the last 20 years advancements in the design and operation of centrifugal gravity concentrators have made them the predominant method for gravity concentration of gold. Further advances in recent years has expanded the use of this technology for the recovery other heavy minerals. The Knelson and Falcon ...Gold production reached a level of 110 kg per month during the tailings treatment years from 1995 to 2007. To date in excess of 1 million ounces of gold have been produced from the property. On April 1