17% - 23% Alumina ball, Catayst Bed Supports Alumina balls,Ball supports,Ceramic ... ,19,25,38 Inert Ceramic Balls as Catayst Supports The 23-25% Al2O3 Inert Alumina Ceramic Balls are used as catalyst ... strength activity catalyst.Chemical composition Al2O3+SiO2Al2O3Fe2O3MgOK2O+Na2O+CaOOther> 92%23-25%<1%<2.5%<4%<0.5%Leachable Fe2O3 is ... .01-1/2''(38mm)>1300>132''(50mm)>5700>57 17% - 23% Alumina ball