... 1.alumina ceramic ball 2.High crushing strength 3.high strength low broken rate 4.ISO 9001:2008 5.AAA credit alumina ceramic ... and into, is a natural quartz sand, glass ball, metal ball and so on low intensity support agent alternative, the ... sand production can be summarized as crushing, ingredients, grinding, the ball, calcining, pulverized coal preparation, finished product cooling, screening, ...