Behavior of secondary alumina during heating

Тип публикации: статья из журнала

Год издания: 2010

Идентификатор DOI: 10.3103/S1067821210060039

Ключевые слова: electrolytic obtaining of aluminum, dry gas purification, secondary alumina, fluorinated alumina, determination of the fluorine content, adsorption model, weight loss, adsorption model, determination of the fluorine content, dry gas purification, electrolytic obtaining of aluminum, fluorinated alumina, secondary alumina, weight loss, Adsorption model, determination of the fluorine content, dry gas purification, electrolytic obtaining of aluminum, fluorinated alumina, secondary alumina, Weight loss, Adsorption, Air purification, Aluminum, Chemisorption, Desorption, Fluorine compounds, Gas fuel purification, Heating, Fluorine, adsorption, aluminum oxide, desorption, electrolyte, fluorine, heating, moisture, temperature effect

Аннотация: The losses of weight and F-containing compounds by secondary alumina at various temperatures which can be reached in a bunker of automated feeding by alumina (AFA)-i.e., to 80, 100, 200, 300, and 400A degrees C-are evaluated. The fluorine content in alumina after being held at a specified temperature was determined by the photocolorimetric method. Upon the heating of secondary alumina, noticeable losses of weight and fluorine were observed in it starting from t > 80A degrees C, which is associated with the removal of the latter with physically adsorbed moisture. However, the larger part of fluorine remains in secondary alumina even at t = 400A degrees C, because it consists of solid fluorides and chemisorbed particles. The desorption of fluorine from alumina even at relatively low temperatures (starting from 80A degrees C) means that constructive and technological measures are necessary to decrease them in AFA bunkers.

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Издание

Журнал: RUSSIAN JOURNAL OF NON-FERROUS METALS

Выпуск журнала: Vol. 51, Is. 6

Номера страниц: 447-450

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)
  • Vinogradov A.M. (Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia)

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