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首页> 外文会议>International conference on environmental biotechnology and materials engineering;EBME 2011 >Synthesis of fine silica particles from iron ore tailings using water-in-oil emulsion
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Synthesis of fine silica particles from iron ore tailings using water-in-oil emulsion

机译：油包水型乳液从铁矿石尾矿中合成二氧化硅微粉

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摘要

Fine silica particles were synthesized using sodium silicate from the iron ore tailings and ion exchange of ammonium sulfate at room temperature by water-in-oil (w/o) emulsion containing water, nonionic surfactant of Triton X-100, and cyclohexane. The reaction conditions and silica particles properties were investigated by X-ray diffraction (XRD), FT-IR analysis and scanning electron microscopy (SEM). The results showed that the particle size of SiO2 decreased with increase of reaction time and concentration of surfactant. The preparation conditions were experimentally determined for obtaining the fine silica particles with submicron size, narrow size distribution, sphere in shape, and high purity without sodium contamination.
机译：使用硅酸钠从铁矿石尾矿中合成硅微粉，并在室温下通过含水的油包水（w / o）乳液，Triton X-100的非离子表面活性剂和环己烷进行离子交换，合成硫酸铵。通过X射线衍射（XRD），FT-IR分析和扫描电子显微镜（SEM）研究反应条件和二氧化硅颗粒性质。结果表明，随着反应时间和表面活性剂浓度的增加，SiO2的粒径减小。通过实验确定了制备条件，以获得具有亚微米尺寸，窄尺寸分布，球形，高纯度且无钠污染的二氧化硅细颗粒。

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