东北大学学报(自然科学版) ›› 2022, Vol. 43 ›› Issue (7): 959-965.DOI: 10.12068/j.issn.1005-3026.2022.07.007

• 材料与冶金 • 上一篇    下一篇

从硼泥中提取硅、硼的新工艺

宁志强, 宋雨陶, 赵润宇, 韩帅男   

  1. (东北大学 冶金学院, 辽宁 沈阳110819))
  • 发布日期:2022-08-02
  • 通讯作者: 宁志强
  • 作者简介:宁志强(1978- ),男,辽宁沈阳人,东北大学副教授.
  • 基金资助:
    “十三五”国家重点研发计划项目(2017YFB0305401).

New Technology for Extracting Silicon and Boron from Boron Mud

NING Zhi-qiang, SONG Yu-tao, ZHAO Run-yu, HAN Shuai-nan   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Published:2022-08-02
  • Contact: NING Zhi-qiang
  • About author:-
  • Supported by:
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摘要: 以硼泥为原料,硼泥与碳酸钠混合后在900℃下焙烧2h,采用碱浸法回收焙烧后硼泥中的SiO2和B2O3.通过TG-DSC曲线分析了焙烧阶段的反应过程.通过单因素试验研究了碱浸阶段:n(NaOH)/n(SiO2)、反应温度、反应时间、液固质量比等条件对硼泥中的SiO2和B2O3提取率的影响.通过正交试验,确定了影响SiO2提取率各因素之间的主次关系依次为:n(NaOH)/n(SiO2)>液固质量比>反应时间>反应温度,影响B2O3提取率各因素之间的主次关系为:反应时间>反应温度>n(NaOH)/n(SiO2)>液固质量比.最佳的回收条件:n(NaOH)/n(SiO2)为25,反应温度为50℃,反应时间为40min,液固质量比为8,在此条件下SiO2的提取率为83.11%,B2O3的提取率为75.28%.

关键词: 硼泥;二氧化硅;氧化硼;碳酸钠;氢氧化钠

Abstract: Taking boron mud as raw material, the boron mud mixed with sodium carbonate was roasted at 900℃ for 2h, and the SiO2 and B2O3 in the roasted boron mud were recovered by alkaline leaching method. The reaction in the calcination stage was analyzed by TG-DSC curve. The effects of n(NaOH)/n(SiO2), reaction temperature, reaction time and liquid-solid mass ratio on the extraction ratios of SiO2 and B2O3 in boron mud were studied by single factor experiment. By orthogonal experiment, the order of factors affecting the extraction ratio of SiO2 was determined as n(NaOH)/n(SiO2) >liquid-solid mass ratio>reaction time>reaction temperature, and the order of factors affecting the extraction ratio of B2O3 was reaction time>reaction temperature>n(NaOH)/n(SiO2)>liquid-solid mass ratio. The optimum recovery conditions were n(NaOH)/n(SiO2) of 25, reaction temperature of 50℃, reaction time of 40min, and liquid-solid mass ratio of 8. Under these conditions, the extraction ratios of SiO2 and B2O3 reached 83.11% and 75.28%,respectively.

Key words: boron mud; silicon dioxide; boron oxide; sodium carbonate; sodium hydroxide

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