N-(3-氨丙基)-月桂酰胺对铝硅酸盐矿物的浮选  

Flotation of aluminosilicates using N-(3-aminopropyl)-dodecanamide

作　　者：赵世民[1] 胡岳华[1] 王淀佐[1] 张岳贵[1] 

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083

出　　处：《中国有色金属学报》2003年第5期1273-1277,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础发展规划项目 (G19990 64 90 11)

摘　　要：研究了N (3 氨丙基 ) 月桂酰胺对高岭石、伊利石和叶蜡石的浮选性能。结果表明 :N (3 氨丙基 ) 月桂酰胺对这些铝硅酸盐都有较好的捕收性能 ,对高岭石、伊利石和叶蜡石的回收率分别在 91% ,90 %和 96 %以上。矿浆 pH值对 3种矿物的可浮性影响较小 ,在一个较宽的 pH范围内 ,3种矿浆的Zeta电位均为负值 ,矿粒表面荷负电。红外光谱证明 ,3种矿物中均含有—OH基。酸性介质中 ,捕收剂分子通过静电引力吸附在矿粒表面 ;碱性介质中 ,捕收剂分子通过氢键吸附在矿粒表面。矿粒的扫描电镜照片表明 :叶蜡石颗粒主要呈薄片状 ;伊利石和高岭石颗粒呈不规则形状。The flotation behaviour of aluminosilicates using N-(3-aminopropyl)-dodecanamide were studied. The recoveries of more than 91%, 90% and 96%can be achieved for the kaolinite, illite and pyrophyllite respectively.The pulp pH produces a less effect on the recoveries of the three aluminosilicates.The recoveries of the three aluminosilicates tend to increase along with the raising collector concentration. The Zeta potentials of the three aluminosilicates are negative over a wide pH-range, as a result, the surfaces of the particles are negatively charged. In the acidic medium, collector molecules are drawn to surface of the particles mainly by electrostatic forces, while in the alkaline pulp, they are adsorbed mainly by way of hydrogen bond. The scanning electron photomicrograph of aluminosilicate particle shows that the pyrophyllite particles take the shape of thin slice, but illite and kaolinite are particles with irregular appearance.

关 键 词：铝硅酸盐矿物 浮选 月桂酰胺 高岭石 伊利石 叶蜡石 捕收性能 铝土矿 

分 类 号：TD952[矿业工程—选矿] TD923.1