柠檬酸对白云母可浮性的抑制机理

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王宇斌,文堪^*,王望泊

西安建筑科技大学资源工程学院，陕西西安 710055

收稿日期:2018-05-09修回日期:2018-06-25出版日期:2019-04-22发布日期:2019-04-18
通讯作者:文堪

基金资助:高芳烃高含氮重油催化转化反应基础研究;,陕西省教育厅基金

Inhibition mechanism of citric acid on the floatability of muscovite

Yubin WANG, Kan WEN*, Wangbo WANG

School of Resources Engineering, Xi?an University of Architecture & Technology, Xi?an, Shaanxi 710055, China

Received:2018-05-09Revised:2018-06-25Online:2019-04-22Published:2019-04-18

摘要/Abstract

摘要： 为研究油酸钠体系中柠檬酸对白云母可浮性的影响规律及其与白云母的作用机理，利用红外光谱(FT-IR)、光电子能谱(XPS)、ζ电位和浮选溶液化学等方法对不同白云母样品进行了表征。结果表明，柠檬酸可明显抑制白云母的可浮性，在矿浆pH值为6、油酸钠浓度为9.20×10–4 mol/L的条件下，使用4.76×10–5 mol/L柠檬酸，白云母的回收率仅为0.40%。柠檬酸抑制白云母的可浮性主要是柠檬酸在溶液中生成的C6H7O7–和C6H6O72–等离子吸附在白云母表面，阻碍了油酸根等离子的吸附，且这些离子的吸附导致白云母表面ζ电位负向增大，削弱了油酸根等离子在白云母表面的静电吸附及化学吸附作用。此外，C6H7O7–和C6H6O72–等离子含羟基等强烈亲水基团，吸附在白云母表面会使白云母表面强烈亲水，白云母的可浮性大大降低。

引用本文

王宇斌文堪王望泊. 柠檬酸对白云母可浮性的抑制机理[J]. 过程工程学报, 2019, 19(2): 338-344.
Yubin WANG Kan WEN Wangbo WANG. Inhibition mechanism of citric acid on the floatability of muscovite[J]. Chin. J. Process Eng., 2019, 19(2): 338-344.

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