(1. 武漢工業(yè)大學(xué) 資源與環(huán)境工程學(xué)院， 武漢 430070;
2. 景德鎮(zhèn)陶瓷學(xué)院 材料工程系， 景德鎮(zhèn) 333001)
摘 要: 采用剪切絮凝工藝，可有效脫除高嶺石中的赤鐵礦。Auger電子能譜研究表明，油酸鈉能夠化學(xué)吸附于赤鐵礦表面使其疏水。通過對(duì)赤鐵礦顆粒間總作用勢(shì)能的計(jì)算，推測(cè)赤鐵礦在剪切攪拌力場(chǎng)的作用下發(fā)生疏水作用是其絮凝的主要原因，而在同樣的條件下高嶺石與油酸鈉未發(fā)生相互作用，其顆粒仍保持高度的分散。
關(guān)鍵字: 剪切絮凝； 油酸鈉； 高嶺石； 赤鐵礦
（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
