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E. V. Tikhonova
E. V. Tikhonova
Saint Petersburg State Mining University
Saint Petersburg State Mining University

Articles

Without section
  • Date submitted
    2012-09-19
  • Date accepted
    2012-11-26
  • Date published
    2013-03-01

Prospects of magnesium oxide application in Bayer’s aluminous technology

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The question of magnesium oxide application for purification of aluminate liquors of aluminous production is in a complex considered. The two-phasic process is offered for providing of magnesium hydrocarbo- and sulfuraluminates formation by interaction of magnesium oxide with aluminate liquors under conditions, corresponding to parameters of aluminous production. High sorption activity of received compounds is defined with reference to organic substances of aluminate liquors.

How to cite: Sizyakov V.M., Tikhonova E.V., Cherkasova M.A. Prospects of magnesium oxide application in Bayer’s aluminous technology // Journal of Mining Institute. 2013. Vol. 202. p. 63.
Without section
  • Date submitted
    2012-09-28
  • Date accepted
    2012-11-01
  • Date published
    2013-03-01

Selective activity of some sorbents of organic compounds in aluminate liquors

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Sharp selectivity of hydrocarboaluminates of caustic-earth metals and magnesium oxide in relation to the most dangerous classes of  the organic  substances playing defining role in decrease in extent of decomposition level and deterioration of produced alumina properties– humic, carboxylic acids and high-molecular organic compounds are defined. Soda is good for humic acids sorption (about 40 %) also is inefficient for removal of carboxylic acids and high-molecular compounds. Harmful groups of organic substances generally provide chromaticity of aluminate liquors. The photometric analysis states an objective assessment of the content of the painted organic substances in relation to their initial quantity in aluminates   liquors.

How to cite: Tikhonova E.V., Sizyakova E.V. Selective activity of some sorbents of organic compounds in aluminate liquors // Journal of Mining Institute. 2013. Vol. 202. p. 75.
Without section
  • Date submitted
    2012-09-23
  • Date accepted
    2012-11-09
  • Date published
    2013-03-01

Investigation of the colored organic compounds behavior in aluminate liquors during electrolysis treatment

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The behavior of impurities – colored organic compounds (COC) in aluminate liquors of Bayer process during electrolysis treatment was investigated. Experimental data for the impact of various technological parameters and conditions are found to reduce the content of COC to 50-80 %.

How to cite: Zaitsev Y.A., Tikhonova E.V., Sizyakova E.V. Investigation of the colored organic compounds behavior in aluminate liquors during electrolysis treatment // Journal of Mining Institute. 2013. Vol. 202. p. 79.
Innovation technology in the field of metallurgy and enrichment
  • Date submitted
    2010-10-27
  • Date accepted
    2010-12-23
  • Date published
    2011-04-01

Ivestigation of conditions оf formation calcium hydrosulfasaluminates in the NA2O – AL2O3 – CAO – SO3 – H2O system

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Calcium hydrosulfasaluminates (GSAK) is a component of cement. They are slowly formed together with the forming of the structure of cement in water solution at measurable temperatures (0-25 °C) during about 4-6 months. Slow rate of crystallization of GSAK wasn`t allowed to treat them as self-autonomy objects for use in various technological applications. The possibility of formation of GSAK (4CaO×Al 2 O 3 ×mSO 3 ×nH 2 O) is proved in an environment of saturated electrolytes – aluminates solutions of alumina production. They crystallize in a short time about 1-2 hours and retain their stability in long time about 24-36 hours. This allowed for us to identify ways of their industrial use. 

How to cite: Sizyakov V.M., Sizyakova E.V., Tikhonova E.V. Ivestigation of conditions оf formation calcium hydrosulfasaluminates in the NA2O – AL2O3 – CAO – SO3 – H2O system // Journal of Mining Institute. 2011. Vol. 192. p. 9.