Leaching

In this study, the recovery of gallium (Ga) and aluminum (Al) from the by-product of Bayer process, the electrofilter dust of a calcination plant, was studied. Factorial leaching tests were also designed based on the results of the preliminary tests. Effects of factors and their interactions on the...

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Bibliographic Details
Published in:Separation science and technology 2015-01, Vol.50 (16), p.2596-2605
Main Authors: Okudan, Mediha Demet, Akcil, Ata, Tuncuk, Aysenur, Deveci, Haci
Format: Article
Language:English
Subjects:
Aluminum
Byproducts
Dust
Extraction
Factorials
Leaching
Nitric acid
Oxalic acid
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Summary:In this study, the recovery of gallium (Ga) and aluminum (Al) from the by-product of Bayer process, the electrofilter dust of a calcination plant, was studied. Factorial leaching tests were also designed based on the results of the preliminary tests. Effects of factors and their interactions on the extraction of Ga and Al were demonstrated using Analysis of Variance of the findings. In the factorial design, nitric acid (HNO sub(3)) leaching tests up to 43.4% Ga and 35.2% Al were leached from the electrofilter dust. The addition of oxalic acid (H sub(2)C sub(2)O sub(4)) significantly enhanced the sulphuric acid (H sub(2)SO sub(4)) leaching of the dust with up to 48.3% Ga and 39.6% Al extractions.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2015.1062027