... manufacutring for ceramic ball. ISO9001:2008 Product description:As the material to support and cover catalyst in the reactor ,inert alumina ball can ... mechanical strength,high chemical stability,and excellent heat endurance ,inert alumina ball can resist high temperature,high pressure ,acid,alkali,salt ... 1,350 g /cm 384 lb /ft 3 support media for catalyst:low alumina ball for oil refinery