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(2)/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.
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
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