欢迎访问过程工程学报, 今天是

›› 2008, Vol. 8 ›› Issue (2): 300-304.

• 过程与工艺 • 上一篇    下一篇

铁尾矿制备白炭黑的实验研究

于洪浩 薛向欣 杨大威   

  1. 东北大学材料与冶金学院硼资源生态化综合利用技术与硼材料重点实验室 东北大学材料与冶金学院 东北大学材料与冶金学院硼资源生态化综合利用技术与硼材料重点实验室
  • 收稿日期:2007-10-30 修回日期:2008-01-15 出版日期:2008-04-20 发布日期:2008-04-20
  • 通讯作者: 薛向欣

Preparation of Precipitated Silica Powder from Iron Ore Tailing

YU Hong-hao XUE Xiang-xin YANG Da-wei   

  1. School of Material and Metalurgy, Northeastern University School of Materials and Metallurgy, Northeastern University School of Material and Metalurgy, Northeastern University
  • Received:2007-10-30 Revised:2008-01-15 Online:2008-04-20 Published:2008-04-20
  • Contact: XUE Xiang-xin

摘要: 以铁尾矿和NaOH为原料,利用化学沉淀法成功制备了无定型白炭黑,并研究了制备的工艺条件. 用X射线衍射仪、红外光谱仪、扫描电镜、透射电镜和X射线荧光光谱仪对所制白炭黑的物相结构、粒度、形貌和成分进行分析. 结果表明,白炭黑中的SiO2纯度为92.3%,化学结构为无定型的水合二氧化硅,形貌近似球状粒子,粒径在150 nm以下. 白炭黑的比表面积(BET)为108 m2/g,10%悬浮液中pH值为5.5~6.0,加热减量为5.42%, 1000℃灼烧减量为6.16%. 产品符合中国行业标准HG/T 3061-1999的要求.

关键词: 铁尾矿, 碱处理, 白炭黑, 化学沉淀

Abstract: The preparation of precipitated silica particles via chemical precipitation using iron ore tailing and sodium hydroxide as raw materials was successfully demonstrated. The experimental conditions for synthesizing precipitated silica particles were examined in detail. The phase composition, morphology and structure of the synthesized particles were characterized by X-ray diffraction (XRD), FT-IR spectrometry, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray fluorescence analysis. The SiO2 purity in the precipitated silica product was 92.3%, determined by X-ray fluorescence analysis. The chemical structure of precipitated silica was hydrated silicon oxide through FT-IR analysis. The structure of precipitated silica was amorphous by XRD analysis. The SEM and TEM micrographs showed that the shape of precipitated silica particles was nearly spherical, and their average grain diameter less than 150 nm. The measured results of chemical and physical properties of precipitated silica powder were obtained as followed: the specific surface area was 108 m2/g, pH in the 10% suspending liquid 5.5~6.0, and loss on ignition at 1000℃ was 6.16%. The product could be comparable with the requirements of HG/T 3061-1999 industrial product standard.

Key words: iron ore tailing, basification treatment, silica particles, chemical precipitation

中图分类号: