Abstract
Research on the low-potential hydrophobic state of pyrite, with potassium amyl xanthate (PAX) as collector, is reported to help explain and understand the fundamental aspects of the N 2TEC flotation process, which was originally developed for the improved recovery of gold from refractory auriferous sulfide ores. Typically in the N 2TEC process, air is replaced by nitrogen as the flotation gas, and potassium amyl xanthate is used as collector for the reactive auriferous pyrite particles. The first N 2TEC flotation process was commissioned at Lone Tree in Nevada in March 1997 and has been in operation since that time. On the basis of electrochemically controlled contact angle measurements, the low-potential, low-pH hydrophobic state of pyrite has been examined as a function of flotation variables such as pH, gas-phase composition, collector concentration and pyrite potential.
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