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To: Laser who wrote (8068)10/22/1998 11:06:00 PM
From: Zeev Hed  Respond to of 14226
 
Laser, Stillwater first concentration process is essentially gravitational. Actually floatation and separation, and I think they are using a "special" surfactant and the affinity of the high grade particles to that surfactant cause trapping in top foam, but I am not sure of this. By the time they are finished with this concentration step they are well above an oz/ton (of the concentrates).

Zeev


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