Study on the accelerant to the sodium oleate during bauxite flotation  

作　　者：Liu Sanjun Hu Yuehua Qin Wenqing 

机构地区：[1]School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China

出　　处：《Engineering Sciences》2012年第2期45-48,共4页中国工程科学（英文版）

基　　金：National Key Fundamental Research and Development Program(No.2005cbc237601)

摘　　要：The conventional collector for diaspore mineral is oleic acid （OLA）, which is highly insoluble and must be used in high dosage in bauxite flotation. Firstly flotation experiments with every reagent （sodium oleate, tween-20）were carried out and it was shown that sodium oleate was an effective diaspore collector, whereas nonionic surfactant tween-20 showed little collectivity. Then experiments were carried out with sodium oleate as the main collector with the addition of tween-20 to study the influences of potentiator on diaspore flotation. It could be seen from the experiments that potentiator had a marked influence on the recovery of diaspore, which was raised by more than 12 % and that addition sequence also affected the flotation behavior. It gave the best results with the reagents mixed thoroughly before added and the best ratio of collector oleic acid and potentiator tween-20 slLood at 10： 1. From the calculation of the ingredients in the sodium oleate solution, at the pH 9, sodium oleate acted with surface of the mineral with the acid-soap polymer [ HOL ~ OL- ]. Zeta potential test showed that the potentiator promoted the absorption of collector on the mineral surface, which lowered zeta potential. As could be seen from surface tension experiments, the addition of potentiator tween-20 lowered the CMC （ critical micelle concentration） value of oleic acid solution, which was equivalent to raise the power of the agents. By the adsorptive capability tests, with the addition of tween-20, the adsorption of oleic acid on diaspore got more.

关 键 词：DIASPORE oleic acid FLOTATION potentiator polyxyethylene 20 sorbitan monolaurate 

分 类 号：TD951.1[矿业工程—选矿] TQ133.1[化学工程—无机化工]