晶体结构和表面性质对石英浮选行为影响研究

发布时间：2018-05-22 11:02

本文选题：硅钙质磷矿 + 石英　；参考：《矿物学报》2017年03期

【摘要】：采用阳离子捕收剂HAY和脂肪酸类捕收剂GJBW对采自贵州织金硅钙质磷矿床的石英试样进行可浮性试验。结果表明,HAY比GJBW更易吸附于石英表面,2个试样可浮性存在差异。采用X射线衍射、扫描电镜及X射线能谱、Zeta-电位对石英晶体结构及表面特性进行分析。X射线衍射分析结果表明,2份试样物相组成单一,纯度高,结晶粒度较大。晶胞参数分析计算结果与理论值接近,偏大,晶胞参数偏差是影响石英可浮性的主要因素。扫描电镜及能谱分析表明:石英表面存在凹坑和明显棱角,晶体表面存在微量的Al、Mg和K等元素对石英进行活化,其相对密度越大,石英可浮性越好。Zeta-电位分析结果表明,石英零电点较低,石英表面金属离子使石英Zeta电位负移,石英表面电负性强,在弱酸条件下使用阳离子捕收剂HAY对其浮选效果较好。推测石英表面杂质元素可能是以类质同象进入石英晶体结构,对石英表面特性及可浮性影响较大。
[Abstract]:The floatability test of quartz samples collected from Guizhou Zhijin siliceous calcium phosphate deposit by cationic collector HAY and fatty acid collector GJBW was carried out. The results showed that HAY was more easily adsorbed on quartz surface than GJBW, and the floatability of the 2 samples was different. X ray diffraction, scanning electron microscope and X ray energy spectrum, Zeta- potential were used for quartz crystal structure and the crystal structure of quartz. The analysis of surface properties by.X ray diffraction shows that the phase composition of the 2 samples is single, the purity is high and the grain size is larger. The results of the cell parameter analysis are close to the theoretical value, and the deviation of the cell parameters is the main factor affecting the floatability of quartz. The scanning electron microscope and the energy spectrum analysis show that the surface of quartz has pits and obvious prism. There are some trace elements such as Al, Mg and K on the surface of the crystal. The higher the relative density of the quartz, the better the floatability of quartz is, the better the.Zeta- potential analysis results show that the zero electric point of quartz is lower. The quartz surface metal ions make the quartz Zeta potential shift, the quartz surface is electronegative, and the cationic collector HAY is used to flotation under the weak acid condition. It is concluded that the impurity elements on quartz surface may enter quartz crystal structure with isomorphism, which has great influence on the surface characteristics and floatability of quartz.
【作者单位】：贵州大学矿业学院;贵州省非金属矿产资源综合利用重点实验室;贵州省优势矿产资源高效利用工程实验室;
【基金】：国家自然科学基金(编号:51264005,51474078) 贵州省科学技术基金(黔科合JZ字[2014]2009号)) 矿业学院研究生创新基金(编号:院研2015002)
【分类号】：TD923;TD97

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