柠檬酸在含碳酸盐赤铁矿浮选体系中的分散机理
发布时间：2018-12-07 10:13
【摘要】：以赤铁矿、菱铁矿和石英为研究对象,通过沉降试验、Zeta电位测试、傅里叶红外光谱分析和溶液化学计算研究了柠檬酸在强碱性条件下(pH=11.0)的分散机理.沉降试验结果表明,柠檬酸对人工混合矿(赤铁矿-菱铁矿-石英)具有较好的分散效果.动电位和红外光谱测试表明,柠檬酸在赤铁矿和菱铁矿表面的吸附较强烈并使其动电位负移,而在石英表面的吸附较弱并对石英动电位影响较小.溶液化学计算表明,柠檬酸主要以[C_6H_5O_7]~(3-)的形式吸附在赤铁矿和菱铁矿的羟基化表面,进而阻止矿粒间的凝聚.结果表明柠檬酸在含碳酸盐赤铁矿浮选体系中具有分散作用.
[Abstract]:Based on hematite siderite and quartz the dispersion mechanism of citric acid under strong alkaline conditions (pH=11.0) was studied by sedimentation test Zeta potential analysis Fourier transform infrared spectroscopy and solution chemistry calculation. The result of sedimentation test shows that citric acid has good dispersion effect on artificial mixed ore (hematite siderite quartz). The adsorption of citric acid on the surface of hematite and siderite was stronger and the dynamic potential moved negatively, but the adsorption on the surface of quartz was weaker and had little effect on the dynamic potential of quartz. The solution chemistry calculation shows that citric acid is mainly adsorbed in the form of [C_6H_5O_7] ~ (3-) on the hydroxylation surface of hematite and siderite, thus preventing the aggregation of ore particles. The results show that citric acid is dispersed in the flotation system containing carbonate hematite.
【作者单位】： 东北大学资源与土木工程学院;
【基金】：国家自然科学基金资助项目(51374079,51504053) 中国博士后科学基金资助项目(2015M571324) 辽宁省科技厅博士科研启动基金资助项目(201501157) 辽宁省教育厅科学研究一般项目(L20150180)
【分类号】：TD923
本文编号：2367042
[Abstract]:Based on hematite siderite and quartz the dispersion mechanism of citric acid under strong alkaline conditions (pH=11.0) was studied by sedimentation test Zeta potential analysis Fourier transform infrared spectroscopy and solution chemistry calculation. The result of sedimentation test shows that citric acid has good dispersion effect on artificial mixed ore (hematite siderite quartz). The adsorption of citric acid on the surface of hematite and siderite was stronger and the dynamic potential moved negatively, but the adsorption on the surface of quartz was weaker and had little effect on the dynamic potential of quartz. The solution chemistry calculation shows that citric acid is mainly adsorbed in the form of [C_6H_5O_7] ~ (3-) on the hydroxylation surface of hematite and siderite, thus preventing the aggregation of ore particles. The results show that citric acid is dispersed in the flotation system containing carbonate hematite.
【作者单位】： 东北大学资源与土木工程学院;
【基金】：国家自然科学基金资助项目(51374079,51504053) 中国博士后科学基金资助项目(2015M571324) 辽宁省科技厅博士科研启动基金资助项目(201501157) 辽宁省教育厅科学研究一般项目(L20150180)
【分类号】：TD923
【参考文献】
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