The following is a good read from a PCFG 2008 news release on why the succesfull geotextile tube test in 2010 was so important to the outcome of gold production for our company.
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6/16/2008 8:00:00 AM ET
PCFG - Desanding Update
TORONTO, June 16, 2008 /PRNewswire-FirstCall via COMTEX News Network/ --
Pacific Gold Corp. (OTCBB: PCFG) announced today that it has identified new equipment for the desanding requirements at the Black Rock Canyon mine owned and operated by Nevada Rae Gold, Inc.
The Black Rock Canyon screening plant operates a relatively simple circuit of machinery. First the gold bearing gravels are washed with clean process water. Next the gravel is scrubbed with a series of screens. After being washed and scrubbed the gravel is fed into a centrifugal concentrator where the gold is separated from the gravel and water slurry. Once the gold is removed the remaining gravel and water must then be separated so that the water can be properly recycled and the gravel used for land reclamation.
The screening plant previously failed when after the gold had been removed from the gravel and water slurry, the plant systems could not separate the remaining sand and fine gravels from the plant process water. This caused the sand and gravel to fill up the settling ponds and not allow for the plant to have access to clean process water.
The Company believes that a stacking hydrocyclone added to the screening plant circuit should remove a significant volume of sand and fine gravels that were previously being delivered to the settling ponds. The stacking hydrocyclone specifications show that a significant amount of solids should be removed, prior to the slurry being fed to the plant settling ponds, with a manageable amount of water remaining with the gravel that is removed by the hydrocyclone.
The company has also determined that the use of Geotextile dewatering tubes could potentially eliminate most of the remaining fine gravels from being delivered to the settling ponds and allow for mostly clean water to be reprocessed back into the screening operations.
The Company recently completed a lab test program with Spinpro of Chilliwack, B.C. that showed very promising results using Geotextile tubes. The Company currently has plans to begin a large scale test of the Geotextile tubes at the Black Rock Canyon mine site.
As soon as the remaining plant modifications are completed an on-site test of the new hydrocyclones and Geotextile tubes will begin.
