Abstract
Based on the population balance equation in a batch crystallizer characteristic of seeded precipitation, a model to calculate the rate of apparent crystal growth of aluminum hydroxide from the size distribution was developed. The simulation results indicate that the rate of apparent crystal growth during seeded precipitation exhibits a manifest dependence on the crystal size. In general, there is an obvious increase in the apparent crystal growth rate with the augment in crystal size. The apparent activation energy increases with the increase of characteristic crystal size, which indicates that the growth of small crystals is controlled by surface chemical reaction; it is gradually controlled by both the surface reaction and diffusion with the augment in crystal size.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
YANG Zhong-yu. The Technology of Alumina Production[M]. Beijing: Metallurgical Industry Press, 1993. 115–140. (in Chinese)
Addai-Mensah J. Surface and structural characteristics of gibbsite precipitated from pure, synthetic Bayer liquor[J]. Minerals Engineering, 1997, 10(1): 81–96.
Alamdari A, Raper J A, Wainwright M S. A model for aluminum trihydroxide crystallization from pure and impure solutions[A]. Proceedings of 127th TMS Annual Meeting: Light Metals[C]. San Antonio, Texas, 1998. 133–139.
Remillard M, Cloutier L J, Methot C. Crystallisation of alumina trihydrate: effect of agitation condition[J]. The Canadian Journal of Chemical Engineering, 1980, 58(6): 348–356.
Misra C, White E T. Kinetics of crystallization of aluminum trihydroxide from seeded caustic aluminate solutions[J]. Chemical Engineering Progress Symposium Series, 1970, 110: 53–65.
White E T, Bateman S H. Effect of caustic concentration on the growth rate of Al(OH)3 particles[A]. Proceedings of 117th TMS Aunual Meeting: Light Metals[C]. Phoenix, Arizona, 1988. 157–162.
Chapman J A. Kinetic modeling of the Bayer process [A]. Proceedings of 120th TMS Annual Meeting: Light Metals[C]. New Orleans, Louisiana, 1991. 91–96.
Steemson M L. Mathematical model of the precipitation of a Bayer Plant[A]. Proceedings of 113th TMS Annual Meeting: Light Metals[C]. Los Angeles, 1984. 237–253.
Crama W J. Modeling and computer simulation of alumina trihydrate precipitation[A]. Proceedings of 123th TMS Annual Meeting: Light Metals[C]. San Francisco, 1994. 73–82.
Nyvlt J, Sohnel O, Mauchova M, et al. The Kinetics of Industrial Crystallization[M]. New York: Elsevier Science Publishing Company, 1985. 193–213.
Euardo J, Evaluation of agglomeration stage conditions to control alumina and hydrate particle breakage[A]. Proceedings of 121st TMS Annual Meeting: Light Metals[C]. New York, 1992. 199–202.
ZHANG Jun, ZHANG Ping-min, CHEN Jin-qing, et al. Application of the particle size distribution to the kinetics study of the sodium aluminate seeded precipitation[J]. Journal of Guangdong Nonferrous Metals, 2003, 13(1): 21–26. (in Chinese)
XU Xiao-hui. A model characterizing apparent crystal growth rate in seeded precipitation from caustic aluminate solution [D]. Changsha: Central South University, 2004. (in Chinese)
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Project(50274076) supported by the National Natural Science Foundation of China
Rights and permissions
About this article
Cite this article
Li, Xb., Liu, Zj., Xu, Xh. et al. Model of apparent crystal growth rate and kinetics of seeded precipitation from sodium aluminate solution. J Cent. South Univ. Technol. 12, 662–666 (2005). https://doi.org/10.1007/s11771-005-0065-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-005-0065-2