一种组合抑制剂在光卤石正浮选中的使用效果

青海格尔木盐湖地区在采用冷分解—正浮选工艺从高钙低钾光卤石地表矿生产氯化钾产品的过程中,以单一羧甲基纤维素钠(CMC)作为浮选工序的抑制剂,存在水不溶物得不到充分抑制,产品质量差,KCl回收率也低的问题。为此,将1种阳离子聚胺类药剂W与CMC组成组合抑制剂,比较了其与单一CMC在格尔木盐湖地区高钙低钾光卤石地表矿冷分解产物浮选过程中的使用效果。试验结果显示:采用单一CMC时,1粗1扫所得浮选粗精矿的平均KCl含量为53.41%、平均水不溶物含量为4.98%、平均KCl回收率为93.50%,水不溶物的平均抑制率为73.46%;而采用CMC+W组合抑制剂时,所得浮选粗精矿的平均KCl含量为57.86%、平均水不溶物含量为2.84%、平均KCl回收率为95.53%,水不溶物的平均抑制率为85.82%。两者相比,后者的水不溶物抑制率提高了12.36个百分点,同时所获浮选粗精矿的KCl含量和回收率分别提高了4.45和2.03个百分点,从而证明了后者不仅具有更强的抑制能力,而且具有更好的选择性。

Effects of a Combined Inhibitor on Direct Flotation of Carnallite

Single sodium carboxymethyl cellulose (CMC) is used as inhibitor in cold decomposition-direct flotation process for production of potassium chloride from high calcium low potassium carnallite ore in Qinghai Golmud Salt Lake Region，but it has problems of water insoluble not fully inhibited，poor product quality，and low KCl recovery rate.Therefore，effects of combining inhibitor of CMC and W (a cationic poly amine reagent) and only CMC are compared in the cold decomposition-direct flotation process of Golmud Salt Lake high calcium and low potassium carnallite surface mines.Experimental results showed that，rough concentrate by the flotation process of one roughing and one scavenging has quality of average KCl content of 53.41%，average water insoluble substances content of 4.98%，average KCl recovery of 93.50%，average inhibition ratio of water insoluble substance of 73.46%; While using combined inhibitor CMC+W，rough concentrate has quality of average KCl content of 57.86%，average water insoluble substances content of 2.84%，average KCl recovery of 95.53%，average inhibition ratio of water insoluble substance of 85.82%.By comparison，the inhibition ratio of water insoluble substance of the latter was increased by 12.36 percent point，content and recovery of KCl of rough concentrate was increased by 4.45 and 2.03 percent point respectively，which indicated that the combined collector have higher inhibiting ability，and better selectivity as well.