INFLUENCE OF MECHANICAL ACTIVATION PERIODICALLY AND CUNFINUALY WORKING MILLS ON INDEXOF DUSTINGAND RATE OF ALUMINA DISSOLUTION
Influence of mechanical activation (MA) of Achinsk refinery alumina on its physicomechanical properties (angle of repose (АOR), specific surface, grading, dusting index, flowability), rate of dissolution in cryolite melts are studied. Dusting indexes after MA for Achinsk and Nikolaev refinaryes for secondary aluminas (after Jas treat-ment center) are low. Dust indexes and rates of dissolution for Achinsk refinery aluminas after MA in continuons working AGO – 9 activation mill with enery= 20 g. Found that the mechanical activation in the primary alumina AGC continuous mill AGO-9 reduces dusting alumina index 2.3 times. The dissolution rate of alumina after MA at a concentration used in industrial environments higher than to unactivated 1.5-2 times.