用高频介电测量研究捕收剂和抑制剂在方解石上的吸附

Q1 Earth and Planetary Sciences International Journal of Mineral Processing Pub Date : 2017-09-10 DOI:10.1016/j.minpro.2017.06.006
M. Khayar , J. Bessière
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引用次数: 4

摘要

通过高频介电测量,可以现场分析浮选过程中吸附物/吸附剂的相互作用。络合捕收剂(油酸钠)在方解石上的吸附增加了与频率无关的介电常数。吸附后介电常数增加,因为吸附物和吸附剂通过共价键相互作用。涉及静电相互作用或氢键(十二烷基胺和十二烷基硫酸盐)的物理吸附对介电特性没有影响。电介质法允许使用诸如硼砂和硅酸钠等试剂分析抑制机制。
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Study of the adsorption of collectors and depressants onto calcite by high frequency dielectric measurements

It is possible to analyze in situ the adsorbate/adsorbant interaction during the flotation process by high frequency dielectric measurements. The adsorption of complexing collector (sodium oleate) onto calcite increases the dielectric permittivity independently of the frequency. The dielectric constant increases after adsorption because the adsorbate and the adsorbant interact through covalent bonds. Physical adsorption involving electrostatic interactions or hydrogen bonds (dodecylamine and dodecylsulfate) has no effect on the dielectrical characteristics. The dielectric method allows to analyze the mechanisms of depression using reagents such as quebracho and sodium silicate.

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来源期刊
International Journal of Mineral Processing
International Journal of Mineral Processing 工程技术-工程:化工
CiteScore
3.02
自引率
0.00%
发文量
0
审稿时长
11.1 months
期刊介绍: International Journal of Mineral Processing has been discontinued as of the end of 2017, due to the merger with Minerals Engineering. The International Journal of Mineral Processing covers aspects of the processing of mineral resources such as: Metallic and non-metallic ores, coals, and secondary resources. Topics dealt with include: Geometallurgy, comminution, sizing, classification (in air and water), gravity concentration, flotation, electric and magnetic separation, thickening, filtering, drying, and (bio)hydrometallurgy (when applied to low-grade raw materials), control and automation, waste treatment and disposal. In addition to research papers, the journal publishes review articles, technical notes, and letters to the editor..
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