Silicon saturation coefficient changes in hydrogarnets during the Bayer process with lime addition

Guozhi Lü; Ting'an Zhang; Xiaofeng Zhu; Chaozhen Zheng; Yanxiu Wang; Weiguang Zhang; Zimu Zhang

doi:10.1016/j.cjche.2018.10.016

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Silicon saturation coefficient changes in hydrogarnets during the Bayer process with lime addition

Materials and Product Engineering | Updated：2026-01-06

- Silicon saturation coefficient changes in hydrogarnets during the Bayer process with lime addition
- Chinese Journal of Chemical Engineering Vol. 27, Issue 8, Pages: 1965-1972(2019)
- Affiliations：
  
  Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education, School of Metallurgy, Northeastern University,Shenyang,China,110819
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.10.016
  CLC：
- Published：2019
- Accepted：
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Guozhi Lü, Ting'an Zhang, Xiaofeng Zhu, Chaozhen Zheng, Yanxiu Wang, Weiguang Zhang, Zimu Zhang. Silicon saturation coefficient changes in hydrogarnets during the Bayer process with lime addition[J]. Chinese Journal of Chemical Engineering, 2019, 27(8): 1965-1972.
DOI：

Guozhi Lü, Ting'an Zhang, Xiaofeng Zhu, Chaozhen Zheng, Yanxiu Wang, Weiguang Zhang, Zimu Zhang. Silicon saturation coefficient changes in hydrogarnets during the Bayer process with lime addition[J]. Chinese Journal of Chemical Engineering, 2019, 27(8): 1965-1972. DOI： 10.1016/j.cjche.2018.10.016.

摘要

Abstract

The relationship between the silicon saturation coefficient of hydrogarnets and Bayer reaction parameters was studied. The peak position

crystal plane spacing

and cell edge length of typical hydrogarnet patterns were calculated to find the key factors influencing the relationship. The results showed that the crystal face (420) is the optimal garnet growth direction during hydration and crystal growth along the faces (521) and (611) were not affected significantly by the varying experimental conditions. The reaction temperature significantly influenced the silicon saturation coefficient of hydrogarnets. The silicon saturation coefficient of hydrogarnets increased from 0.2 to about 1.0 in the temperature range of 30-270℃ and a rapid expansion process was observed in the temperature range of 120-150℃. Moreover

the reaction time

alumina concentration

and

C/S

were shown to be less important factors. Averaging the results obtained by the 3 methods was shown suitable for calculating the SiO

saturation coefficient of hydrogarnets. The calculated results of the Al

and SiO

contents matched the actual ones. However

the actual SiO

content was about 10% less than the calculated one for SiO

saturation coefficients higher than 1.

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Related Author

Xiaofeng Zhu

Ting an Zhang

YanxiuWang

Guozhi Lu

Weiguang Zhang

CongWang

Aichun Zhao

Related Institution

2 School of Material Science and Engineering, Taiyuan University of Science and Technology

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