ETHYLENE-OXIDE PROPYLENE-OXIDE COPOLYMERS IN CELESTITE FLOTATION

Several flotation experiments have been done using ethylene oxide/prop ylene oxide copolymers as depressor agents, and it has been found that the mineral recovery is greatly influenced by its size and little by agent concentration. Also, it has been studied the flotation bath surf ace tension with regard to different non-ionic surfactants concentrati ons and to pH. The results obtained show that Monolan 8000/E80 as well as Monolan PC reduce considerably the bath surface tension, although they are insensitive to bath pH changes or the used concentrations ran ge.