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Effects of caustic sodium concentration and molecular ratio of Na2O to Al2O3 on agglomeration in the precipitation process

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Abstract

The supersaturation of sodium aluminate solution (liquor) is a prerequisite for agglomeration and the key factors that determine supersaturation of liquor are caustic sodium concentration (Nk) and molecular ratio of Na2O to Al2O3 (αk). In this paper, the effects of Nk and αk on the agglomeration process of seeded precipitation were studied. The results show that the Nk plays an important role in the agglomeration process. The supersaturation of liquor decreases with the increasing of Nk and so not only does the precipitation ratio of liquor decrease but also the particle size of agglomerate decreases. The supersaturation of liquor decreases with the increasing of αk and so the precipitation rate and depth of liquor decrease and thus the agglomeration of fine particles is weakened.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, Changsha, Hunan, 410083, China

    Zhanwei Liu & Wenmi Chen

  2. Zhengzhou Research Institute of Chalco, Zhengzhou, Henan, 450041, China

    Wangxing Li

Authors
  1. Zhanwei Liu
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  2. Wenmi Chen
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  3. Wangxing Li
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Correspondence to Zhanwei Liu.

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Liu, Z., Chen, W. & Li, W. Effects of caustic sodium concentration and molecular ratio of Na2O to Al2O3 on agglomeration in the precipitation process. JOM 62, 32–34 (2010). https://doi.org/10.1007/s11837-010-0164-x

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  • DOI: https://doi.org/10.1007/s11837-010-0164-x

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