New Technology for Extracting Silicon and Boron from Boron Mud

doi:10.12068/j.issn.1005-3026.2022.07.007

Abstract

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

CLC Number:

TP110.9

NING Zhi-qiang， SONG Yu-tao， ZHAO Run-yu， HAN Shuai-nan. New Technology for Extracting Silicon and Boron from Boron Mud[J]. Journal of Northeastern University(Natural Science), 2022, 43(7): 959-965.

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