Development and Test Study of a New Classification Equipment for Bauxite Desiliconization

Abstract:

In this paper, a new classification equipment for Bauxite desiliconization is introduced, which combines Centrifugal with gravity and it can separate diaspore and slime effectively in a composite force; The flow field in the equipment was simulated by Fluent software for explaining separation process and principle; the laboratory experiments and pilot tests had been finished on this kind of device, showing that a concentrate with Al₂O₃ recovery of 90.64% and Al-Si ratio of 6.34 was obtained from the feed with a Al/Si ratio of 4.7 based on one stage desiliconization separation; the pilot tests show that new classification equipment for Bauxite desiliconization can increase the concentration with Al₂O₃ recovery by 1.59 percent and Al-Si ratio by 0.19 and degrease the Al-Si ratio of tailing by 0.39. The separation index of the new separator is better than the general separator obviously.

• Periodical: Applied Mechanics and Materials (Volumes 80-81)
• Pages: 1324-1329
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.80-81.1324
• Online since: July 2011
• Authors: Dong Fang Lu, Yu Hua Wang, Wei Sun, Dong Liang Lu, Yue Hua Hu
• Keywords: Bauxite, Compound Force Field, Desliming Equipment

References

[1] T. Jiang, G. Z. Qui, G. H. Li, et al. Pre-desilication of mid-low grade bauxite using processing methods-recent advances. Mining Metall. Eng., 19(2) (1996) 3-6.

[2] Y. H. Wang, Y. H. Hu, P. B. He, et al. Test Research on Selective Desliming of Bauxite. Met. Mine, 4 (2004) 38-40.

[3] S. S. Ling, X. L. Zhang, X. Shang, et al. Survey on Pre-deslication of bauxite using physical methods. Metallic Ore Dressing Abroad, 10 (2006) 9-11.

[4] C. B. Huang, Y. H. Wang, X. H. Chen, et al. Review of Research on Desilication of Bauxite Ores by Reverse Flotation. Metal Mine, 6 (2005) 21-24.

[5] X. Q. Chen, W. Q. Bai and W. Z. Yan. Status and Research Progress of Bauxite Floatation Desilication. Light Metal, 2 (2006) 8-12.

[6] S. M. C. P. Pedrosa, J. R. Nunhez . The behavior of stirred vessels with anchor type impellers. Comput. Chem. Eng, 24 (2000) 1745-1751.

DOI: 10.1016/s0098-1354(00)00456-7

[7] R. Newell, S. Grano. Hydrodynamics and scale up in Rushton turbine flotation cells: Part 1 — Cell hydrodynamics. Int. J. Mine. Processing, 81 (2007) 224–236.

DOI: 10.1016/j.minpro.2006.06.007

[8] F. Scargiali, A. D'Orazio, F. Grisafi, A. Brucato. Modelling and Simulation of Gas-Liquid Hydrodynamics in Mechanically Stirred Tanks. Chem. Eng. Res. Des., 85(5) (2007) 637–646.

DOI: 10.1205/cherd06243

[9] M. Ljungqvist , A. Rasmuson. Numerical Simulation of the Two-Phase Flow in Axially Stirring Vessl. Inst. Chem. Eng., 7 (2001) 533-546.

[10] M. Schafer, B. Karasozen, Y. Uludag, et al. Numerical method for optimizing stirrer configurations. Comput. Chem. Eng., 30 (2005) 183–190.

[11] P. A. Tanguy, F. Thibault, E. B. L. Fuente, et al. Mixing performance induced by coaxial flat blade-helical ribbon impellers rotating at different speeds. Chem. Eng. Sci., 52(11) (1997) 1733-1741.

DOI: 10.1016/s0009-2509(97)00008-0