东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (12): 1755-1758.DOI: -

• 论著 • 上一篇    下一篇

富硼渣钠化法制备硼砂过程中的影响因素

李杰;樊占国;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-12-15 发布日期:2013-06-22
  • 通讯作者: Fan, Z.-G.
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划项目(2006AA06Z368);;

Study on influencing factors on preparing process of borax from boron-rich slag

Li, Jie (1); Fan, Zhan-Guo (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-12-15 Published:2013-06-22
  • Contact: Fan, Z.-G.
  • About author:-
  • Supported by:
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摘要： X射线衍射分析(XRD)表明,富硼渣中的硼组分主要以Mg2B2O5形式存在,而钠化渣中的硼组分以Na4B2O5和NaBO2晶相形式析出.对钠化渣进行磨细、水浸、过滤、结晶等操作,可最终制得硼砂晶体.采用化学分析和XRD等方法研究了热处理温度、碳酸钠加入量、钠化渣细度对硼浸出率的影响.当钠化渣在温度为650℃下保温1.5h,碳酸钠加入量为理论量的2.3倍,钠化渣粒度小于74μm时,硼的最大浸出率可达76.04%.

关键词: 富硼渣, 钠化渣, 水浸, 硼浸出率, 硼砂

Abstract: Boron-rich slag could be separated from ludwigite by pyrometallurgical method. Na2CO3 was added to the melted slag to change the existing form of boron, then the Na4B2O5 and NaBO2 in crystalline phase were precipitated from the Na2CO3-modified slag at high temperature as shown by XRD analysis. Sodium borates thus turned into solution via the water leaching, grinding, filtering and crystallizing of Na2CO3-modified slag and, as a result, borax could be precipitated from the solution at room temperature. Effects of the adding dose of Na2CO3, heat-treatment temperature and particle size of Na2CO3-modified slag on the leaching rate of boron were investigated by chemical analysis and XRD. It was found that the actual adding dose of Na2CO3 is 2.3 times as great as the theoretical one if the Na2CO3-modified slag is treated at 650°C and held for 1.5 hr, and that the highest leaching rate of boron can be up to 76.04% if the particle size of Na2CO3-modified slag is less than 74 μm.

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