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CFB Alumina Calciners—New and Future Generation Opportunities for Green Field Refineries Read chapter Read first chapter

2017 | OriginalPaper | Chapter

Leaching Behavior of Alumina from Smelting Reduction Calcium Aluminate Slag with Sodium Carbonate Solution

Authors : Zhifang Tong, Yingjie Li

Published in: Light Metals 2017

Publisher: Springer International Publishing

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Abstract

Leaching behavior of alumina of smelting reduction calcium aluminate slag based on high-iron red mud composition was investigated. Alumina of calcium aluminate slag was leached using sodium carbonate solutions (Na2CO3 abbr., Na2Oc). The effects of Na2Oc concentration, reaction temperature, reaction time, liquid-solid ratio on the leaching rate of alumina were investigated and its leaching kinetics was studied as well. The results show that the optimum conditions of leaching is reaction temperature of 75 °C, Na2Oc concentration of 100 g L−1, reaction time of 100 min, liquid-solid ratio of 4.5:1. The leaching rate of alumina is 83.7% under the optimum conditions. It is found that the leaching process can be satisfactorily represented by fitting with Avrami equation. The apparent activation energy of leaching pro cess and the feature parameter of Avrami equation are determined to be 11,844 kJ mol−1 and 0.0983, respectively, the leaching process is inner-difussion controlled.

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previous chapter Thermodynamic Analysis and Formation Law of Q Phase of Calcium Aluminate Clinker
next chapter Security Disposal and Comprehensive Utilization of Bauxite Residues
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Metadata
Title
Leaching Behavior of Alumina from Smelting Reduction Calcium Aluminate Slag with Sodium Carbonate Solution
Authors
Zhifang Tong
Yingjie Li
Copyright Year
2017
Book
Light Metals 2017

Print ISBN: 978-3-319-51540-3

Electronic ISBN: 978-3-319-51541-0

Copyright Year: 2017

DOI
https://doi.org/10.1007/978-3-319-51541-0_6

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