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过程工程学报 ›› 2018, Vol. 18 ›› Issue (4): 710-715.DOI: 10.12034/j.issn.1009-606X.217353

• 反应与分离 • 上一篇    下一篇

NaHCO3溶液浸出硼精矿中硼的工艺

李玉花1,2， 况盛阳3， 张亦飞1*， 薄 婧1,2， 刘鹏飞1,2， 邓立聪1   

  1. 1. 中国科学院过程工程研究所绿色过程与工程重点实验室，湿法冶金清洁生产技术国家工程实验室，北京 100190
    2. 中国科学院大学化学与化工学院，北京 100049
    3. 辽宁首钢硼铁有限责任公司，辽宁 丹东 118100
  • 收稿日期:2017-10-09 修回日期:2017-12-07 出版日期:2018-08-22 发布日期:2018-08-15
  • 通讯作者: 张亦飞 yfzhang@ipe.ac.cn

Leaching process of boron from boron concentrate by sodium bicarbonate solution

Yuhua LI1,2, Shengyang KUANG3, Yifei ZHANG1*, Jing BO1,2, Pengfei LIU1,2, Licong DENG1   

  1. 1. Key Laboratory of Green Process and Engineering, National Engineering Laoratory of Hydrometallurgy Cleaner Production
    Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    2. School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
    3. Liaoning Shougang Boron Iron Co., Ltd., Dandong, Liaoning 118100, China
  • Received:2017-10-09 Revised:2017-12-07 Online:2018-08-22 Published:2018-08-15
  • Contact: ZHANG Yi-fei yfzhang@ipe.ac.cn

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摘要： 研究了NaHCO3溶液提取硼精矿熟料中硼的工艺，考察了液固比、NaHCO3用量、浸出温度、浸出时间和搅拌速率对硼提取率的影响. 结果表明，最佳提取工艺条件为液固质量比2.1:1，NaHCO3用量为理论用量的150%，反应温度100℃，反应时间1 h，搅拌速率400 r/min，该条件下硼浸出率达92.88%. 硼精矿熟料的晶形大多是柱状和扁平状，并有微小颗粒附着其表面；终硼泥为很多小晶体堆叠在一起，与硼精矿熟料相比，终硼泥颗粒变小，因此可用收缩核模型描述硼精矿熟料中硼在NaHCO3溶液中的浸出过程. 金云母、遂安石、利蛇纹石和橄榄石是硼精矿熟料的主要物相，而终硼泥出现了MgCO3和Na2Mg(CO3)2物相，遂安石消失.

关键词: NaHCO3, 硼精矿, 浸出, 终硼泥, 形貌

Abstract: Leaching process of B from calcined boron concentrate in NaHCO3 solution was studied. The effects of mass ratio of liquid to solid, sodium bicarbonate consumption, reaction temperature, time and stirring speed on leaching of boron were examined. The results showed that under the optimum conditions of mass ratio of liquid to solid of 2.1:1, sodium bicarbonate consumption of theoretical amount of 150%, leaching temperature of 100℃, leaching time of 1 h, stirring speed of 400 r/min, leaching rate of B reached 92.88%. The morphology of calcined boron concentrate is mainly columnar and flat crystal, which is attached with some small particles. The boron sludge is a lot of little crystals that stack together, and the particle size of boron sludge is smaller. Therefore, it is speculated that leaching process of B from calcined boron concentrate in NaHCO3 solution can be described by the shrinking core model. The major phases in the calcined boron concentrate were suanite, lizardite, phlogopite and olivine, and with the suanite phase disappearing, the major phases in the boron sludge were MgCO3 and Na2Mg(CO3)2.

Key words: sodium bicarbonate, boron concentrate, leaching, final boron sludge, morphology