Using Knelson gravity concentrators, about 50% of the gold is easily liberated and recovered as free gold at Blanket Mine in Zimbabwe . Knelson gravity concentrators are the leaders in free gold recovery in Africa!
Blanket started production in 1904. Early workers mined the visible gold sections of the pay shoots, i.e. pick the “eyes” out of the mine. Following on the significant early production milestones were: in 1965 Falconbridge acquired the property and increased gold production to an average of approximately 45 kg per month. In 1993 Kinross took over the property. After which the Carbon-in-Leach (“CIL”) plant was build and enlarged with capacity of approximately 3,800 tonnes per day (“tpd”) to treat an old tailings dump together with the run-of-mine ore. This led to the gold production reaching 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.
FLSmidth Knelson Concentrators are the market leaders in gravity concentrators, and are worth more than their weight in gold. Using centrifugal force and water injection processes, FLSmidth Knelson Concentrators create enhanced gravitational forces of up to 200 g’s to recover free gold, fine gold and any other precious metals or minerals with high specific gravities. As pioneers of the gravity concentration industry, FLSmidth Knelsons have been replicated and competed with since their inception. However, due to their superior design, lifespan and continuous R&D they have forever led the industry in both innovation and market share.
The original Batch Knelson Concentrators run for pre-defined cycle periods, after which the concentrate is harvested by means of an automated Centre-Discharge system. They are perfectly suited for the secure recovery of gravity recoverable gold (GRG) and other heavy metals and minerals from both alluvial and hard-rock plants.
Batch Knelsons are available with a variety of concentrating cone designs and with centrifugal fields of up to 200g, to provide wide choices to suit different site and machine feed conditions. Furthermore, concentrating cones are disposable wear parts, greatly reducing operating and stock-holding costs.