, Volume 61, Issue 11–12, pp 1016–1022 | Cite as

Evaluation of the Effect of Nepheline Sinter Structure on Hydration Activity During Alumina Production

  • A. V. Aleksandrov
  • N. V. Nemchinova
  • G. G. Mineev
  • A. A. Yakovleva

Under conditions for maintaining a stable demand for aluminum in the world, the problem of providing basic high-quality raw material for its preparation, i.e., alumina, remains unresolved. In this connection, work is important aimed at finding ways of improved efficiency for preparing alumina, in particular, by an alkaline sintering method. Experimental data are presented for the defective nature of the structure of different modifications of (α′-, β-) dicalcium silicate 2CaО·SiO22S), comprising the basis of nepheline sinters. A thermoluminescence method (TSL) is used for C2S specimens prepared with different heat treatment regimes in the range from 1270 to 25°C, and different spectra are established that point to correlation of crystal lattice defect concentration and the degree of test C2S specimen cooling. A correlation is established between the degree of decomposition of different forms of C2S in aluminate-alkaline solution and structural defectiveness evaluated by TSL. It is shown that C2S crystal lattice defectiveness decreases with a reduction in the cooling rate. It is established that β-C2S formed with slow cooling exhibits less defectiveness compared with α′-C2S. Introduction of measures based on results of these studies makes it possible to increase alumina yield and quality used in primary aluminum production.


alumina production sintering nepheline sinter dicalcium silicate thermoluminescence sinter leaching aluminate-alkaline solution 


  1. 1.
    V. M. Sizyakov, A. A. Vlasov, and V. Y. Bazhin, “Strategic tasks for the metallurgical complex of Russia,” Tsvet. Met., No. 1, 32–38 (2016).Google Scholar
  2. 2.
    X. L. Wang, Alumina Production Theory & Technology, Central South University, Changsha (2010).Google Scholar
  3. 3.
    S. Skaarup, Y. Gordeev, V. Volkov, and V. Sizyakov, “Dry sintering of nepheline – a new more energy efficient technology,” Light Metals, 111–117 (2014).Google Scholar
  4. 4.
    V. Smirnov, “Alumina production in Russia. P. I: Historical background,” JOM, 48, No. 8, 24–26 (1996).CrossRefGoogle Scholar
  5. 5.
    V. A. Lipin and A. Yu. Baimarkov, “Ways of improving technology for treating aluminosilicate raw material for alumina and associated products,” Tsvet. Met., No. 4, 64–68 (2014).Google Scholar
  6. 6.
    V. V. Sizyakov, Increase in the Efficiency of Comprehensive Processing of Nepheline Based on Using Carbo-Aluminate Compounds: Auth. Abstr. Dissert. Cand. Techn. Sci., St. Petersburg (2007).Google Scholar
  7. 7.
    B. A. Arlyuk, Comprehensive Treatment for Alkali-Aluminum-Containing Raw Material, Metallurgiya, Moscow (1994).Google Scholar
  8. 8.
    V. Ya. Abramov, Physicochemical Bases of Comprehensive Treatment of Aluminum Raw Material: Handbook, Metallurgiya, Moscow (1985).Google Scholar
  9. 9.
    A. V. Aleksandrov and R. Ya. Dashkevich, “Study of conditions for forming polymorphic modifications of dicalcium silicate and their behavior during leaching of aluminum-containing sinters,” Proc. 13th Int. Conf. Aluminum Siberia-2007, Krasnoyarsk (2007), pp. 460–463.Google Scholar
  10. 10.
    Lesley E. Smart and A. Elaine, Solid State Chemistry: An Introduction, CRC Press (2005).Google Scholar
  11. 11.
    Ch. N. R. Rao and J. Gopolakrishnan, New Directions in Solid Chemistry, Nauka, Novosibirsk (1990).Google Scholar
  12. 12.
    M. N. Sychev and E. N. Kazanskaya, “Study of elementary acts of element hydration,” Zh. Prikl. Khim., No. 4, 736–748 (1982).Google Scholar
  13. 13.
    T. V. Kuznetsova, “Reaction capacity of calcium silicates,” Zh. Prikl. Khim., No. 4, 945–948 (1986).Google Scholar
  14. 14.
    G. A. Lushcheikin, Polymeric Electrets, Khimiya, Moscow (1984).Google Scholar
  15. 15.
    H. A. Borbón-Nuñez and C. Furetta, “Activation energy of modified peak shape equations,” World J. Nucl. Sci. Technol., Nо. 07:04, 274–283 (2017).Google Scholar
  16. 16.
    G. A. Vagner, Scientific Dating Methods in Geology, Archaeology, and History, Tekhnosfera, Moscow (2006).Google Scholar
  17. 17.
    G. M. Polozov, Impurity Defectiveness, Thermal Stimulation of Luminescence and Activity of Dicalcium Silicate: Diss. Cand. Techn. Sci., Leningrad (1991).Google Scholar
  18. 18.
    K. R. Sature, B. J. Patil, S. S. Dahiwale, et al., “Development of computer code for deconvolution of thermoluminescence glow curve and DFT simulation,” J. Luminesc., Nо. 192, 486–495 (2017).Google Scholar

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • A. V. Aleksandrov
    • 1
  • N. V. Nemchinova
    • 2
  • G. G. Mineev
    • 2
  • A. A. Yakovleva
    • 2
  1. 1.Department of Technology and Technical Development of Alumina Production, RUSAL Engineering and Technology Center (RUSAL ITTs)AchinskRussia
  2. 2.Irkutsk National Research Technical UniversityIrkutskRussia

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