东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (12): 1734-1737.DOI: -

• 论著 • 上一篇    下一篇

硼酸重结晶过程影响因素研究

龚殿婷;李凤华;樊占国;刘素兰;   

  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:2008-12-15 发布日期:2013-06-22
  • 通讯作者: Gong, D.-T.
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划项目(2006AA06Z368)

On the influencing factors on H3BO3 recrystallization

Gong, Dian-Ting (1); Li, Feng-Hua (1); Fan, Zhan-Guo (1); Liu, Su-Lan (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-12-15 Published:2013-06-22
  • Contact: Gong, D.-T.
  • About author:-
  • Supported by:
    -

RichHTML

0

PDF (PC)

3669

摘要： 研究H3BO3-H2O简单体系中,在无外加影响因素的条件下,硼酸质量分数、结晶温度、结晶时间及搅拌速度对硼酸重结晶的影响规律.在相同的结晶温度和结晶时间的条件下,硼酸的质量分数控制在28.5%~31.0%,结晶率可达88%以上.结晶温度选择5~10℃之间,不同的降温方式对硼酸的结晶率影响不大.采用在高温时快速冷却,待降至一定温度后,再慢速冷却降温,可以保证硼酸结晶体多数为具有一定粒度的颗粒.在实验室现有条件下,硼酸的结晶时间在15 h附近为宜.选择硼酸质量分数为28.5%,最终结晶温度为10℃,恒温时间为15 h的实验条件下,慢速搅拌有助于硼酸晶体的生成.

关键词: 硼酸, 重结晶, 结晶率, 正交试验

Abstract: Discusses emphatically some influencing factors on the recrystallization of H3BO3, such as the solution concentration, crystallization temperature/time and stirring speed in the solution of H3BO3-H2O system. The rate of crystallization can be up to over 88% if the crystallization temperature/time is constant and the boric acid concentration is controlled within 28.5%~31.0%. And if the crystallization temperature is selected in the range of 5~10°C, the different cooling ways all effect slightly the crystallization rate of boric acid. But, if a quenching is implemented during high temperature with the temperature cooled to a certain extent and then cooled slowly, most of boric acid crystals are provided with a certain grain size. In our lab the proper crystallization time is about 15 h. If the boric acid solution concentration is 28.5%, and final crystallization temperature is 10°C that is held for 15 h, the slow stirring speed benefits the formation of boric acid crystals.

中图分类号: