Dusting and Fluidity of Alumina with Different Physicochemical Properties

Описание

Тип публикации: статья из журнала

Год издания: 2008

Идентификатор DOI: 10.3103/S1067821208060035

Ключевые слова: Alumina particles, Granulometric compositions, Metallurgical alumina, Physicochemical property, Specific surface, Calcination, Orifices, Alumina

Аннотация: The objects of investigation were metallurgical aluminas from different manufacturers and with different physicochemical properties varying in wide limits: the content of the fraction -45 mu m was 4-60%, the losses during calcination were 0.5-1.2%, the content of the alpha phase was 2.5-23.0%, and the specific surface was 55-120 m(Показать полностью2)/g. The outflow time t(out) of the aluminas was measured using funnels with standard (2.4 mm) and increased (4 and 5 mm) orifices; the outflow time was 2-20 min. The correlations for the values of t(out) for the funnels with mentioned orifices were obtained. The outflow time decreased as the content of the fraction -45 mu m decreased and the water content in alumina increased. The dusting factors (DF) of aluminas were measured with the help of the developed dust counter, and the variation range was 0.5-8.0 mg/g. The dusting factor increased as the content of the fraction -45 mu m and water content in aluminum increased. The main factor determining t(out) and DF is the granulometric composition of alumina. The effect of the form of alumina particles and moisture content in alumina on the t(out) and DF is established. The mechanism explaining the interrelation between the moisture and these values is suggested.

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Издание

Журнал: KINEMATICS AND PHYSICS OF CELESTIAL BODIES

Выпуск журнала: Vol. 24, Is. 6

Номера страниц: 449-455

ISSN журнала: 08845913

Место издания: NEW YORK

Издатель: ALLERTON PRESS INC

Авторы

  • Isaeva L.A. (Siberian Fed Univ, FGOU VPO, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia)
  • Braslavskii A.B. (Siberian Fed Univ, FGOU VPO, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia)
  • Polyakov P.V. (Siberian Fed Univ, FGOU VPO, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia)

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