Crystallization of sodalite particles under Bayer-type conditions

被引：41

作者：

Radomirovic, Tomoko ^{[1
]}

Smith, Peter ^{[2
]}

Southam, Daniel ^{[1
]}

Tashi, Sonam ^{[1
]}

Jones, Franca ^{[1
]}

机构：

[1] Curtin Univ, Dept Chem, Perth, WA 6845, Australia

[2] CSIRO Proc Sci & Engn, Waterford, WA, Australia

来源：

HYDROMETALLURGY | 2013年 / 137卷

关键词：

Bayer process; DSP; Silicate; Heterogenous nucleation; Kaolin; TEMPERATURE; CHEMISTRY;

D O I：

10.1016/j.hydromet.2013.05.006

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The formation of desilication products (DSPs) is an important process in the pre-desilication step of the Bayer process, helping to limit the potential for unwanted scale on the heat exchangers by limiting the amount of silicate in the Bayer liquor. These solids generally have a crystalline sodalite structure, however, the fundamentals of crystallization are still to be fully understood. We show in this work that the DSP formed is initially amorphous when solution silicate is used. When kaolinite solids are present DSP is initially heterogeneously nucleated on the kaolinite but there is also a secondary nucleation event that occurs. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：84 / 91

页数：8

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