... Alumina1. Description of Alumina:Alumina ball is widely used in Ceramic industry,cement industry, paint industry, Color industry,chemical industry,pharmaceutical ... fired at high temperature. Calcined alumina, aluminium oxied for making ceramic AI2O3 >99.5% Na2O <0.3% Fe2O3 <0.024% ... we are using high temperature roller kiln (totally 2 kilns with each 250 meters length andMax.1650 degree centigrade) to ...