Solubility of Aluminum in Cryolite-Alumina Electrolytes

Тип публикации: статья из журнала

Год издания: 2011

Идентификатор DOI: 10.3103/S1067821211040122

Ключевые слова: aluminum solubility, cryolite-alumina electrolytes, productivity of electrolyzers, current yield, aluminum solubility, cryolite-alumina electrolytes, current yield, productivity of electrolyzers, cryolite-alumina electrolytes, Cryolite-alumina melts, current yield, Liquidus temperature, Metal content, Metal solubility, Potassium fluorides, Substantial variations, Aluminum, Electrolytes, Electrolytic cells, Fluorine compounds, Halide minerals, Lithium, Potassium, Volumetric analysis, Solubility, aluminum, aluminum oxide, chemical analysis, cryolite, electrolyte, heating, solubility, temperature effect

Аннотация: The complex influence that additives of aluminum, calcium, lithium, and potassium fluorides have on the total solubility of aluminum in the cryolite-alumina melt is studied. The investigations were performed at a constant overheating of the melt saturated by alumina (15 degrees C relative to the liquidus temperature). The aluminum solubility was determined via the prolonged holding of metal in the melt at a specified temperature with the subsequent sampling of the specimen, which was rapidly frozen, and the metal content in it was determined by a gas-volumetric analysis. It was seen that, as the cryolite ratio (CR) decreases from 2.5 to 2.2, the aluminum solubility in the electrolyte drops by a factor of 1.7, while the further decrease in CR to 2.1 does not cause its substantial variation. The introduction of 3 wt % LiF and 5 wt % KF into the melt with a constant overheating of the melt substantially decreases the metal solubility, namely, by a factor of 2.9 and 1.5, respectively.

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Издание

Журнал: RUSSIAN JOURNAL OF NON-FERROUS METALS

Выпуск журнала: Vol. 52, Is. 4

Номера страниц: 360-363

ISSN журнала: 10678212

Место издания: NEW YORK

Издатель: ALLERTON PRESS INC

Авторы

  • Vasyunina N.V. (Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia)
  • Vasyunina I.P. (Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia)
  • Mikhalev Yu G. (Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia)
  • Polyakov P.V. (Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia)

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