(1. 武汉工业大学 资源与环境工程学院， 武汉 430070;
2. 景德镇陶瓷学院 材料工程系， 景德镇 333001)
摘 要: 采用剪切絮凝工艺，可有效脱除高岭石中的赤铁矿。Auger电子能谱研究表明，油酸钠能够化学吸附于赤铁矿表面使其疏水。通过对赤铁矿颗粒间总作用势能的计算，推测赤铁矿在剪切搅拌力场的作用下发生疏水作用是其絮凝的主要原因，而在同样的条件下高岭石与油酸钠未发生相互作用，其颗粒仍保持高度的分散。
关键字: 剪切絮凝； 油酸钠； 高岭石； 赤铁矿
（1. Department of Resources and Environment Engineering， Wuhan University of Technology，Wuhan 430070， P.R.China；
2. Department of Materials Engineering， Jingdezhen College of Ceramics，Jingdezhen 333001， P.R.China）
Abstract:Hematite was successfully removed from kaolinite by shearflocculation， when sodium oleate was used. The mechanism of selective shearflocculationof hematite from kaolinite was studied by Xray photoelectron spectroscopy (XPS)and the calculation of the total potential energy between hematite particles. It was found that the surface of hematite could adsorb chemically sodium oleate and made it hydrophobic， which would remain under the shear field. Under the samecondition， the surface of kaolinite does not adsorb sodium oleate and remainshydrophilic. The shear field of sufficient magnitude makes the hydrophobic ultrafine particles of hematite aggregate， whereas the hydrophilic ultrafine particles of kaolinite remain suspended in solution.
Key words: shearflocculation; sodium oleate; kaolinite; hematite
