Batch tricalcium aluminate crystallisation and particle morphology

Salimi, Reza and Vaughan, James (2014). Batch tricalcium aluminate crystallisation and particle morphology. In: E. Asselin, D. G. Dixon, F. M. Doyle, D. B. Dreisinger, M. I. Jeffrey and M. S. Moats, Proceedings of the 7th International Symposium on Hydrometallurgy (Hydro2014). Hydrometallurgy 2014: 7th International Symposium, Victoria, BC, Canada, (695-701). 22-25 June, 2014.

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Name Description MIMEType Size Downloads
Author Salimi, Reza
Vaughan, James
Title of paper Batch tricalcium aluminate crystallisation and particle morphology
Conference name Hydrometallurgy 2014: 7th International Symposium
Conference location Victoria, BC, Canada
Conference dates 22-25 June, 2014
Proceedings title Proceedings of the 7th International Symposium on Hydrometallurgy (Hydro2014)
Place of Publication Westmount, QC, Canada
Publisher Canadian Institute of Mining, Metallurgy and Petroleum
Publication Year 2014
Sub-type Fully published paper
Open Access Status
ISBN 9781926872230
Editor E. Asselin
D. G. Dixon
F. M. Doyle
D. B. Dreisinger
M. I. Jeffrey
M. S. Moats
Volume II
Start page 695
End page 701
Total pages 7
Collection year 2015
Language eng
Formatted Abstract/Summary
Tricalcium aluminate hexahydrate (TCA) is used as filter-aid for security filtration in the Bayer alumina process. TCA is typically produced on-site by mixing Bayer liquor with slaked lime. Specific properties are required from the TCA to ensure adequate filter throughput, lifetime and importantly effective reduction of solid/colloidal impurities from the solution. The effect of reaction time on morphology and particle size distribution of tricalcium aluminate was studied for a batch experiment at simulated process conditions. It was found that reaction time plays a critical role on the morphology, crystal structure (diameter and crystallinity) and particle size distribution. In the early stages of the reaction, nucleation dominates the crystallization process followed by growth dominated by agglomeration up to a mean particle size of 10 µm. The particle morphology shifted from an irregular shape to more spherical throughout the course of the reaction.
Keyword Tricalcium aluminate hexahydrate
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Presented during the Tuesday session "Precipitation" as Paper #8208.

Document type: Conference Paper
Collections: School of Chemical Engineering Publications
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Created: Mon, 11 Aug 2014, 17:04:16 EST by Dr James Vaughan on behalf of School of Chemical Engineering