An Investigation of the Effect of the Electrolyte Composition on the Consumption of Fired Anodes during Electrolytic Aluminum Production

Тип публикации: статья из журнала

Год издания: 2008

Идентификатор DOI: 10.3103/S1067821208050064

Ключевые слова: Aluminum electrolysis, Electrolyte compositions, Electrolytic aluminum, Gasphase, Aluminum, Carbon, Electrolysis, Foams, Electrolytes

Аннотация: The effect of adding CaF(2), AlF(3), and KF into electrolyte on the consumption of fired anode during aluminum electrolysis is investigated. The CaF(2) content varied from 5 to 10 wt % in the electrolyte of the industrial composition. Correspondingly, the concentration of AlF(3) and KF varied from 4 to 10 and from 0 to 4.7 wt % in the modified electrolytes. Based on the procedure used, the total consumption of carbon and the amount of carbon transported into the gas phase (m(g)) and foam (m(f)) were determined. Electrolysis duration was 12 h, the distance between the poles was 40 mm, the temperature was 960 degrees C, and the current density was 0.85 and 1.2 A/cm(2). It is established that adding CaF(2) and AlF(3) increases the consumption of anode, while adding KF decreases it. For CaF(2), partial derivative m(f)/partial derivative[CaF(2)] is larger than partial derivative m(g)/partial derivative[CaF(2)], 15.4 and 6.6 kg/(t(A1) wt %) CaF(2), respectively. For AlF(3), partial derivative m(f)/partial derivative[AlF(3)] is also larger than partial derivative m(g)/partial derivative[AlF(3)] and equals 6.8 and 4.2 kg/(t(A1) wt %) AlF(3). For KF, partial derivative m(f)/partial derivative[KF] is smaller than partial derivative m(g)/partial derivative[KF], being -11.3 and -8.1 kg/(t(A1) wt %) KF.

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Издание

Журнал: RUSSIAN JOURNAL OF NON-FERROUS METALS

Выпуск журнала: Vol. 49, Is. 5

Номера страниц: 346-351

ISSN журнала: 10678212

Место издания: NEW YORK

Издатель: ALLERTON PRESS INC

Авторы

  • Vinogradov A.M. (Siberian Fed Univ, Inst Non Ferrous Met & Gold, Krasnoyarsk 660025, Russia)
  • Vasyunina I.P. (Siberian Fed Univ, Inst Non Ferrous Met & Gold, Krasnoyarsk 660025, Russia)
  • Mikhalev Yu. G. (Siberian Fed Univ, Inst Non Ferrous Met & Gold, Krasnoyarsk 660025, Russia)
  • Polyakov P.V. (Siberian Fed Univ, Inst Non Ferrous Met & Gold, Krasnoyarsk 660025, Russia)

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