新型Gemini含酯基阳离子捕收剂的浮选性能

以环氧氯丙烷、十二烷基二甲基叔胺及丁二酸为原料合成新型Gemini含酯基阳离子表面活性剂M-302B。以M-302B为捕收剂对石英和磁铁矿纯矿物进行浮选试验表明M-302B可用于石英和磁铁矿的浮选分离。以M-302B为捕收剂对酒钢选矿厂焙烧—磁选后的精矿进行浮选试验,结果表明,在矿浆p H=7、温度为25℃、苛性淀粉用量为400 g/t、M-302B用量为400 g/t条件下,可得到精矿铁品位为60.24%、回收率为82.19%,选矿效率为31.13%的指标。M-302B与十二胺浮选性能对比试验表明,相较于十二胺,M-302B捕收能力强、耐低温且产生泡沫易被消除。ζ电位测试和红外光谱分析表明,M-302B在石英表面的吸附机理主要为物理吸附和氢键作用。量子化学计算表明M-302B活性高于十二胺。

Flotation Property of a New Ester Containing Gemini Cationic Collector

Gemini new ester containing surfactant M-302B was prepared using succinic acid,pichlorohydrin and dodecyl dimethyl amineand as raw materials. M-302B used as collector in quartz and magnetite pure minerals flotation tests showed that,M-302B can be used in flotation separation of quartz and magnetite. Flotation test on Jiugang plant roasting and magnetic separation concentrate using M-302B as collector indicated that,with pulp pH=7,temperature of 25 ℃,causticity starch dos-age of 400 g/t,M-302B dosage of 400 g/t,concentrate with iron grade of 60. 24%,recovery of 82. 19%,beneficiation efficien-cy of 31. 13% was obtained. Comparison test of floating performance between M-302B and dodecylamine show,compared with dodecylamine,M-302B has superior collecting power,low temperature resistance and the foam produced is easy to be elimina-ted. Zeta potential test and FTIR spectra analysis show that the mechanism of adsorption of collector molecules on quartz sur-face is almost identical for the physical adsorption and hydrogen bonds effect. M-302B has higher reactivity than dodecylamine proved by quantum chemical calculations.