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通过单矿物浮选实验、动电位测定及红外光谱分析,研究了十二胺(DDA)和十二烷基三甲氧基硅烷(WD-10)2种浮选药剂对一水硬铝石和高岭石的浮选行为和作用机理.结果表明:在酸性条件下,十二胺单独使用时,高岭石的回收率略高于一水硬铝石,两种矿物的可浮性差异不大,不能有效实现高岭石与一水硬铝石的浮选分离;十二烷基三甲氧基硅烷单独使用时对高岭石和一水硬铝石均无捕收作用;与单用十二胺相比,DDA+WD-10的组合捕收剂对硅酸盐矿物浮选能力强,选择性好.在pH=4～5.5的范围及最佳药剂配比条件下,高岭石回收率在75%以上,而一水硬铝石回收率只有20%左右,能有效实现铝硅矿物的反浮选分离.
The effects of two kinds of flotation reagents, dodecylamine (DDA) and dodecyltrimethoxysilane (WD-10), on diaspore and kaolinite were studied by single mineral flotation experiment, potentiodynamic measurement and infrared spectroscopy. Stone flotation behavior and mechanism of action.The results show that the recovery rate of kaolinite is slightly higher than that of diaspore when the dodecylamine is used alone under acidic conditions.The differences of floatability between the two minerals are not significant, Can not effectively achieve the separation of kaolinite and a diaspore flotation; dodecyltrimethoxysilane when used alone kaolinite and a diaspore no trapping effect; and dodecylamine alone phase Compared with the combination of DDA + WD-10, the collector has good selectivity and flotation ability for silicate minerals.When the pH value ranged from 4 to 5.5 and the optimal formulation ratio, the recovery rate of kaolinite was 75 %, While the diaspore recovery rate of only about 20%, can effectively achieve the anti-flotation separation of Al-Si minerals.