The kinetics of desilication of synthetic spent Bayer liquor and sodalite crystal growth

Barnes, M.C., Addai-Mensah, J., and Gerson, A.R. (1999) The kinetics of desilication of synthetic spent Bayer liquor and sodalite crystal growth. Colloids and Surfaces A: physicochemical and engineering aspects, 147 (3). pp. 283-295.

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Abstract

The kinetics of desilication of synthetic, sodium aluminosilicate solution (spent Bayer liquor) and growth of sodalite crystals have been studied under isothermal, batch crystallization conditions close to those prevailing in Bayer process heat exchangers. The desilication rate of the liquor via the formation and growth of sodalite scale on steel substrates was found to be independent of agitation rate. With sodalite seeding, the desilication rate was observed to increase dramatically due to seed crystal growth with the suppression of scale formation. An activation energy of 30 kJ mol−1 and a second order dependence of the desilication rate on relative supersaturation of SiO2 were obtained for sodalite crystal growth.

Item ID: 38194
Item Type: Article (Refereed Research - C1)
Keywords: aluminum silicate, article; controlled study; crystallization; heat exchange; nonhuman; priority journal; scanning electron microscopy
ISSN: 1873-4359
Funders: Comalco Aluminium, Queensland Alumina
Date Deposited: 15 Apr 2015 05:07
FoR Codes: 03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl Structural) > 030601 Catalysis and Mechanisms of Reactions @ 50%
03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl Structural) > 030602 Chemical Thermodynamics and Energetics @ 50%
SEO Codes: 84 MINERAL RESOURCES (excl. Energy Resources) > 8403 First Stage Treatment of Ores and Minerals > 840301 Alumina Production @ 100%
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