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Effects of Additives on Particle Size and Strength of Carbonization Product in Sodium Aluminate Liquors |
WANG Zhi;BI Shiwen; YANG Yihong |
Institute of Process Engineering; The Chinese Academy of Sciences; Beijing 100080 |
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Cite this article:
WANG Zhi; BI Shiwen; YANG Yihong. Effects of Additives on Particle Size and Strength of Carbonization Product in Sodium Aluminate Liquors. Acta Metall Sin, 2004, 40(9): 1005-1008 .
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Abstract The problems related to the product strength and fine
particle content are the main tasks to be
solved in sandy alumina production. Carbonization product,
Al(OH)3, was investigated through the application of additives to
sodium aluminate liquors. A systematic study was made of the
effects and mechanism of surfactants on product
median diameter and attrition index quantitatively. It has been
determined that some appropriate additive at certain
concentration can significantly decrease the fine particle
content, enhance the agglomeration process, and
improve the product strength. For instance, additive CF2 at 200 mL/L
increases the mean particle size by about 12 μm,
decreases the content of particles with less 45 μm
by 17% and the attrition index by 10% respectively.
The crystal morphology indicates that
the additives can accelerate the aggregation
and inter-growth of crystal units, as
a result, the product Al(OH)3
presents a mosaic crystal structure close to
global shape.
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Received: 22 October 2003
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