Improvement of Stirred Tank for Aluminum Hydroxide Seeded Precipitation

Abstract:

The known designs of tank for precipitation of aluminum hydroxide from sodium aluminate solution, used in the production of alumina are considered, and the improvement of the design of the precipitator with mechanical mixing is proposed, which allows to intensify the process of precipitation and to avoid strong caustic module of the solution changes.

• Periodical: Materials Science Forum (Volume 946)
• Pages: 596-600
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.946.596
• Online since: February 2019
• Authors: V.B. Chernyshov, Andrey A. Shoppert*, V.I. Sarapulova
• Keywords: Aluminate Solution, Aluminum Hydroxide, Caustic Module, Precipitation, Precipitation Tank, Pulp, Seed

References

[1] G. Liu, G. Wu, W. Chen, X. Li, Z. Peng, Q. Zhou, T. Qi, Increasing precipitation rate from sodium aluminate solution by adding active seed and ammonia, Hydrometallurgy. 176 (2018) 253-259.

DOI: 10.1016/j.hydromet.2018.02.003

[2] J.S. Zeng, S. Ji, Z.L. Yin, Q.Y. Chen, Intensification of precipitation of gibbsite from seeded caustic sodium aluminate liquor by seed activation and addition of crown ether, Hydrometallurgy. 89 (2007) 107–116.

DOI: 10.1016/j.hydromet.2007.07.001

[3] J.L. Stephenson, C. Kapraun, Dynamic modeling of yield and particle size distribution in continuous Bayer precipitation, in: R. Huglen (Eds.), Light Metals 1997. John Wiley & Sons Inc. New Jersey, (1997) 891-897.

DOI: 10.1007/978-3-319-48176-0_123

[4] R. Den Hond, I. Hiralal, Ab Rijkeboer, Alumina yield in the Bayer process past, present and prospects, in: Morten Sorlie (Eds.), Light Metals 1997. John Wiley & Sons Inc. New Jersey, (2007) 528-533.

DOI: 10.1007/978-3-319-48176-0_73

[5] O. Tschamper, Improvements by the new Alusuisse process for producing coarse aluminum hydrate in the Bayer process, in: Gordon M. Bell (Eds.), Light Metals 1981, Metallurgical Society of AIME, Warrendale, PA, (1981) 534-540.

DOI: 10.1007/978-3-319-48176-0_74

[6] B. Celikel, G.K. Demir, M. Kayaci, M. Baygul, C. E. Suarez. Precipitation area upgrade at ETI aluminum, in: Carlos E. Suarez (Eds.), Light Metals 2012, John Wiley & Sons Inc. New Jersey, (2012) 129-133.

DOI: 10.1002/9781118359259.ch23

[7] D. Ilievski, I. Livk, An agglomeration efficiency model for gibbsite precipitation in a turbulently stirred vessel, Chemical Engineering Science. 61 (2006) 2010–(2022).

DOI: 10.1016/j.ces.2005.10.051

[8] 8. W. Arnswald, A. Lalla, G. Vollmers, Improved AOS Technology to Produce Sandy Alumina in a Plant Originally Designed for the Floury Type, in: James W. Evans (Eds.), Light Metals 1995, Mineral, Metals and Materials Society, Warrendale, PA, (1995) 171-175.

[9] J.L. Anjier, M.L. Roberson, Precipitation technology, in: H.O. Bohner (Eds.), Light Metals 1985, Mineral, Metals and Materials Society, Warrendale, PA, (1985) 487-491.

DOI: 10.1007/978-3-319-48176-0_67

[10] B. Zhang, Q. Chen, J. LI, Z. Yin, Effects of temperature and initial molar ratio of Na2O to Al2O3 on agglomeration of fine Al(OH)3 seed in synthetic Bayer solution, J. Cent. South Univ. Technol. 15 (2008) 786−790.

DOI: 10.1007/s11771-008-0145-1

[11] M. Bahrami, E. Nattaghi, S. Movahedirad, S. Ranjbarian, F. Farhadi, The agglomeration kinetics of aluminum hydroxide in Bayer process, Powder Technology. 224 (2012) 351-355.

DOI: 10.1016/j.powtec.2012.03.018

[12] Z. Yin, J. Zeng, Q. Chen, Effect of oleic acid on gibbsite precipitation from seeded sodium aluminate liquours, Int. J. Miner. Process. 92 (2009) 184-189.

DOI: 10.1016/j.minpro.2009.04.003

[13] A.A. Shoppert, I.V. Loginova, Surface activation of industrial aluminum hydroxide for preparing sandy alumina, Metallurgist. 60 (2016) 871-876.

DOI: 10.1007/s11015-016-0379-3

[14] X.B. Li, L. Yan, D.F. Zhao, Q.S. Zhou, G.H. Liu, Z.H. Peng, S.S. Yang, T.G. Qi, Relationship between Al(OH)3 solubility and particle size in synthetic Bayer liquors, Trans. Nonferrous Met. Soc. China. 23 (2013) 1472-1479.

DOI: 10.1016/s1003-6326(13)62619-9

[15] G.H. Liu, Z. Li, T.G. Qi, X.B. Li, Q.S. Zhou, Z.H. Peng, Two-stage process for precipitating coarse boehmite from sodium aluminate solution. JOM. 69 (2017) 1888–1893.

DOI: 10.1007/s11837-017-2468-6

[16] A.I. Lainer, N.I. Eremin, Yu.A. Lainer, Proizvodstvo glinozema [Alumina production]. Moscow, Metallurgy Publ., 1978. (In Russian).

[17] Des Erfinders Auf Nennung Verzicht, DE Patent 239427. (1984).

[18] G. Zhang, H. Zhao, C. Lv, Y. Liu, T. Zhang, CFD Simulations of a large-scale seed precipitation tank stirred with multiple Intermig impellers, in: Margaret Hyland (Eds.), Light Metals 2015, John Wiley & Sons Inc. New Jersey, (2015) 65-68.

DOI: 10.1002/9781119093435.ch12

[19] Y. Liu, H. Zhao, T. Zhang, Q. Zhao, S. Wang, S. Gu; J. He, C. Zhang, Physical Simulation on Mixing Uniformity in Seed Precipitation Tank, in: n: Carlos E. Suarez (Eds.), Light Metals 2012, John Wiley & Sons Inc. New Jersey, (2012) 113-117.

DOI: 10.1002/9781118359259.ch20

[20] V.B. Chernyshov, K.V. Kyrchikov, V.I. Sarapulova, RU Patent 169132U1. (2017).