| 酸溶条件对橄榄石制备超细二氧化硅的影响 |
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| 引用本文： | 王玲,贾蓝波,崔兆纯,熊雨婷,范晨子,聂轶苗,刘淑贤,王龙.酸溶条件对橄榄石制备超细二氧化硅的影响[J].矿产综合利用,2021,42(2):203-212. |
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| 作者姓名： | 王玲 贾蓝波 崔兆纯 熊雨婷 范晨子 聂轶苗 刘淑贤 王龙 |
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| 作者单位： | 1.华北理工大学矿业工程学院 |
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| 基金项目： | 河北省高等学校科学研究计划项目(QN2015091)；唐山市科技局项目(19130216g)；唐山市工业固体废弃物清洁利用基础创新团队项目(19130207C)；中国地质调查项目(DD20190589)；河北省自然科学基金项目(E2019209494) |
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| 摘 要： | 橄榄石矿物酸溶制备超细二氧化硅,原料价格低廉易得,生产工艺简单,可大大降低超细二氧化硅的生产成本,但酸溶环境对二氧化硅粒径有明显的影响.本文考察了硫酸浓度、液固比、超声分散及金属阳离子对超细二氧化硅粒径大小及分布特征的影响.结果 表明,硫酸浓度过高会导致二氧化硅颗粒的团聚;增大液固比、橄榄石酸溶的同时辅以超声分散、延长超声分散时间可显著减少二氧化硅的团聚;金属阳离子会导致二氧化硅的团聚;在硫酸浓度4 mol/L、液固比60 mL/g、酸溶时辅以超声分散可制备出平均粒径5.39 μm的超细二氧化硅.本研究为非金属矿酸法制备超细二氧化硅提供理论与技术支持.
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| 关 键 词： | 橄榄石 超细二氧化硅 硫酸浓度 液固比 超声分散 |
| 收稿时间： | 2019/12/27 0:00:00 |
| 修稿时间： | 2020/3/31 0:00:00 |
Effect of acid dissolution conditions on preparation of ultrafine silica by olivine |
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| Wang Ling,Jia Lanbo,Cui Zhaochun,Xiong Yuting,Fan Chenzi,Nie Yimiao,Liu Shuxian,Wang Long.Effect of acid dissolution conditions on preparation of ultrafine silica by olivine[J].Multipurpose Utilization of Mineral Resources,2021,42(2):203-212. |
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| Authors: | Wang Ling Jia Lanbo Cui Zhaochun Xiong Yuting Fan Chenzi Nie Yimiao Liu Shuxian Wang Long |
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| Affiliation: | 1.College of Mining Engineering, North China University of Science and Technology2.National Research Center for Geoanalysis |
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| Abstract: | The cost of ultrafine silica prepared by acid dissolution of silicate minerals can be reduced greatly, because the raw material is cheap and is easily to obtain. The effects of changing acid dissolution concentration, liquid-to-solid ratio and increasing ultrasonic dispersion on the particle size and dispersion properties of ultrafine silica during the acid dissolution of olivine were investigated. The results showed that high sulfuric acid concentration leaded to agglomeration of silica. Increasing liquid-to-solid ratio and ultrasonic dispersion can reduce the agglomeration of silica. At liquid-to-solid ratio of 60 mL/g, silica with an average particle size of 8.39m was prepared. Silica with an average particle diameter of 5.39m was prepared by ultrasonic dispersion while olivine acid dissolution. Ultrasonic dispersion of acid dissolution solution can also significantly reduce the agglomeration of ultrafine silica. And silica with an average particle diameter of 5.72m was prepared by ultrasonic dispersion for 60 minutes. This study can provide theoretical and technical support for non-metallic mineral acid dissolution to produce ultrafine silica. |
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| Keywords: | olivine ultrafine silica sulfuric acid concentration liquid-to-solid ratio ultrasonic dispersion |
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