非金属矿产null检测 | 受收集吸附影响的锂辉石表面润湿特性-北京欧兰科技发展有限公司

方案摘要

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应用领域	地矿
检测样本	非金属矿产
检测项目
参考标准	暂无

采用立陶宛Ekspla公司的振动和频光谱测量系统（VS-SFG），激光器脉冲宽度20皮秒。对锂辉石表面进行了测量研究。研究了其润湿特性和收集吸附过程之间的关联。

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Ekspla SFG 表面和频光谱分析系统
型号：SFG

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方案详情

The selective flotation separation of spodumene from other aluminosilicate minerals remains a challenging problem in flotation chemistry, and the surface chemistry features are of fundamental importance. In this study,the interfacial chemistry features, particularly the wetting characteristics of selected spodumene surfaces (1 1 0,0 0 1, 0 1 0, and 1 0 0 crystal surfaces), in the absence and presence of collectors, were studied by water contact angle and bubble attachment measurements, molecular dynamics (MD) simulation, and sum-frequency vibrational spectroscopy (SFVS). The experimental results revealed the interfacial water structure at spodumene surfaces. Contact angle, bubble attachment measurements, and MD simulation results showed that the four spodumene surfaces were naturally hydrophilic, whereas in the presence of collectors, preferential adsorption of sodium oleate on the (1 0 0) and (1 1 0) surfaces was found to create a hydrophobic surface state. Detailed
analysis of the interfacial water structure was conducted in order to understand the wetting characteristics at the molecular level, and SFVS was used to study the state of collectors at selected surfaces. The MD simulation and SFVS results revealed that the natural state of the surfaces contributes to the distinct interfacial water structure and the adsorption state of collectors. It seems that unsaturated Al sites at the spodumene surface and their spatial locations account for chemisorption of sodium oleate, while electrostatic attraction appears to be the main driving force for dodecylamine adsorption.

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北京欧兰科技发展有限公司

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