羧甲基纤维素对层状镁硅酸盐矿物浮选的抑制与 - 中国有色金属学报.PDFVIP

21 5 2011 5 Vol.21 No.5 The Chinese Journal of Nonferrous Metals May. 2011 1004-0609(2011)05-1145-06 , , , , , ( 410083) : Zeta 3 (CMC)3 3 CMC MgO CMC : TD923 A Depression and dispersion effect of carboxy methyl cellulose on flotation of layered magnesium-silicates LONG Tao, FENG Qi-ming, LU Yi-ping, ZHANG Guo-fan, OU Le-ming, PAN Gao-chan (School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract: The floatability of three types of layered magnesium-silicates (talc, chlorite and serpentine), the negative effect of magnesium-silicates on the flotation of pyrite (one sulfide mineral of Jinchuan nickel mine) and the depression and dispersion effect of carboxy methyl cellulose (CMC) on the flotation of magnesium-silicates were investigated through flotation tests, contact angle measurements and zeta potential measurements. The results show that the surface properties and floatability of these magnesium-silicates different, and the way how the magnesium-silicates affecting the flotation of sulfides are also different: the natural floatability of serpentine is poor, but electrostatic aggregation occurred between serpentine and pyrite, thus reducing the floatability of pyrite. CMC can disperse serpentine and pyrite by changing the surface electrical property of minerals. Although talc and chlorite cannot affect the recovery of pyrite, they mix in concentrate and then increase the impurity contents of MgO due