摘要
硅线石—微斜长石—油酸钠浮选分离系统中， 金属离子强烈干扰浮选过程， 而Ｆｅ３ ＋ 可明显削弱这种干扰作用。借助显微电泳仪和Ｘ 射线光电子能谱， 研究了Ｆｅ３ ＋ ， Ａｌ３ ＋ 金属离子在硅线石和微斜长石表面的竞争吸附， 揭示了Ｆｅ３ ＋ 对Ａｌ３ ＋ 活化微斜长石产生屏蔽作用的机理。研究发现由于Ｆｅ３ ＋ 能增加硅线石表面ζ电位， 同时降低微斜长石表面ζ电位， 削弱了Ａｌ３ ＋ 对微斜长石的活化作用；ＸＰＳ 研究表明Ｆｅ３ ＋ 对Ａｌ３ ＋ 活化微斜长石产生屏蔽效应的根本原因在于Ｆｅ３ ＋ 能够降低微斜长石表面Ａｌ２ｐ 电子的结合能， 从而降低其表面活性，
The great disturbance of metallic ions (Al 3+ especially ), which is in the flotation system of sillimanite/microcline using sodium oleate as a collector, decrease considerably the difference of floatability of the two minerals. It has been observed that Fe 3+ can obviously resist the activation of Al 3+ on microcline. The mechanism of competitive adsorption of Fe 3+ and Al 3+ on the surface of sillimanite and microcline has been studied by the research of zeta potential and X ray photoelectron spectroscopy (XPS). It is observed that Fe 3+ can decrease electrokinetic potential of microcline (from 8.11mV to 6.39mV) and the binding energy of Al 2p absorbed on the surface of microcline (from 74.35eV to 73.85eV). So, the activation of Al 3+ can be selectively depressed by Fe 3+ .
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1999年第3期606-609,共4页
The Chinese Journal of Nonferrous Metals
关键词
硅线石
微斜长石
浮选
选矿
铁离子
铝离子
sillimanite
microcline
zeta potential
flotation separation
