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Thermophysical Parameters of the Anode Region of Plasma Arc under the Reduction Smelting of Quartz-Leucoxene Concentrate in a Metal-Graphite Reactor

  • PLASMOCHEMICAL METHODS OF PRODUCTION AND TREATMENT OF MATERIALS
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Inorganic Materials: Applied Research Aims and scope

Abstract

The process of reducing plasma-arc smelting of titanium raw materials from the Yarega deposit aimed at refining it from silicon has been studied. The smelting was performed in a water-cooled metal-graphite reactor, consisting of a copper cylindrical chamber with a diameter of 100 mm and a graphite bottom insert with a thickness of 30 mm serving as the anode of the arc. A hollow graphite cathode through the channel of which a mixture of quartz-leucoxene with graphite was supplied to the region of the anode spot was installed in the upper part of the chamber. In the course of quartz-leucoxene melting, silicon dioxide SiO2 contained therein was reduced to SiO with the evaporation thereof, thus enriching the melt in titanium. The arc power amounted to 13 kW. The experimentally measured parameters of the temperature field and the current density in the anode spot and in the arc column are in good agreement with the results of calculations made under the assumption that the arc occurring on the quartz-leucoxene anode acts as a heat source with approximately uniform heat flux density.

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Funding

This work was financially supported according to state assignment no. 007-00129-18-00.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119334, Moscow, Russia

    A. A. Nikolaev, D. E. Kirpichev & A. V. Nikolaev

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  1. A. A. Nikolaev
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  2. D. E. Kirpichev
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  3. A. V. Nikolaev
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Correspondence to A. A. Nikolaev or D. E. Kirpichev.

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Translated by O. Polyakov

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Nikolaev, A.A., Kirpichev, D.E. & Nikolaev, A.V. Thermophysical Parameters of the Anode Region of Plasma Arc under the Reduction Smelting of Quartz-Leucoxene Concentrate in a Metal-Graphite Reactor. Inorg. Mater. Appl. Res. 11, 563–567 (2020). https://doi.org/10.1134/S207511332003034X

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  • DOI: https://doi.org/10.1134/S207511332003034X

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