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E. A. Alekseeva
E. A. Alekseeva
National Mineral Resources University (Mining University)
National Mineral Resources University (Mining University)

Articles

Without section
  • Date submitted
    2012-09-05
  • Date accepted
    2012-11-15
  • Date published
    2013-03-01

About directions of stabilization grain size metallurgical alumina

Article preview

The materials physical and chemical analysis of the reasons of instability particle size distribution of productional of aluminum hydroxide in the processing of bauxite by Bayer process. Shown that the frequency of changes in the properties precipitate Al(OH)3, formed during the precipitation of aluminate solutions determined by the dependence of  the growth  processes on   the relative supersaturation of the system per unit area of the seed. Found determines the influence of concentration injected seed aluminum hydroxide and its active  surface  (which  varies under the influence of impurities in the aluminate solution) on the parameters of the periodic changes in the properties of  sediment.

How to cite: Brichkin V.N., Gordyushenkov E.E., Vasilev V.V., Alekseeva E.A. About directions of stabilization grain size metallurgical alumina // Journal of Mining Institute. 2013. Vol. 202. p. 88.
Without section
  • Date submitted
    2012-09-16
  • Date accepted
    2012-11-08
  • Date published
    2013-03-01

Technical and mineralogical evaluation of low quality bauxite washability (an example of North Onega deposit)

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The results of the technical and mineralogical studies of washability of low quality bauxites of North Onega deposit are presented. The experiments of determination of the grindability of raw materials including without ball grinding and assessment washability bauxite  by magnetic separation and flotation were conducted. These ores are very complex object for enrichment, as characterized by extremely thin impregnated aluminum-containing minerals, as well as  the similarity of their properties. Further work of to conduct experiments using chemical enrichment (as soon as the chemical enrichment, and in combination with the physical methods of enrichment) is planned.

How to cite: Alekseeva E.A., Brichkin V.N., Nikolaeva N.V. Technical and mineralogical evaluation of low quality bauxite washability (an example of North Onega deposit) // Journal of Mining Institute. 2013. Vol. 202. p. 231.
Metallurgy, physical and chemical regularities of technological processes
  • Date submitted
    2011-08-23
  • Date accepted
    2011-10-07
  • Date published
    2012-02-01

Effect of potassium on the solubility of aluminum hydroxide in alkaline aluminate solutions аnd their decomposition

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Materials of calculation of solubility of aluminum hydroxide in the system Na2O – K2O – Al2O3 – H2O, by data of the solubility in the private sections of this system for a wide range of compositions aluminate solutions by the content of alkaline components are  presented. It  is shown that the solubility of aluminum hydroxide in the range of concentration of alkaline components from 1,29 mol/l to 1,94 mol/l is a linear function of the mol fraction of one of them. The results of experimental researches on decomposition of aluminate solutions are given. Significant increase of the degree of decomposition of aluminate solutions in per cents of the theoretical values with growth of mol fraction of K2O in  a mixture of alkaline components has been established.

How to cite: Brichkin V.N., Alekseeva E.A., Nikolaeva N.V., Gordyushenkov E.E. Effect of potassium on the solubility of aluminum hydroxide in alkaline aluminate solutions аnd their decomposition // Journal of Mining Institute. 2012. Vol. 196. p. 113.