Study on the Leaching SiO2 from Boromagnesite by Using Sodium Hydroxide

Zhi Qiang Ning; Yu Chun Zhai; Hua Mei Duan; Huai Zhong Huang

doi:10.4028/www.scientific.net/AMR.554-556.562

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 554-556Study on the Leaching SiO2 from Boromagnesite by...

Study on the Leaching SiO₂ from Boromagnesite by Using Sodium Hydroxide

Abstract:

The residual rich SiO₂ slag was obtained for MgO and B₂O₃ was leached from the boromagnesite by ammonium sulfate. The SiO₂ was leached from the residual slag by sodium hydroxide. The effect of the roasting time, calcination temperature and the ratio of sodium hydroxide to the residual slag on the leaching efficiency of SiO₂ in the residual slag were also studied. The reasonable technical condition as follow : the roasting time is 60 min, the calcination temperature is 550°C, the ratio of the sodium hydroxide to the residual slag is 3.0:1. The SiO₂ leached rate can be stabilized about 85% under this condition.The residual rich SiO

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Periodical:

Advanced Materials Research (Volumes 554-556)

Pages:

562-564

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.554-556.562

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Online since:

July 2012

Authors:

Zhi Qiang Ning, Yu Chun Zhai, Hua Mei Duan, Huai Zhong Huang

Keywords:

Boromagnesite, Silicon Dioxide, Sodium Hydroxide

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