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Product: 99% alumina ball Chemical composition: Sio2 0.15-0.2 Mgo 0.03-0.05. Al2o3 99-99.2 Cao 0.04-0.07. Fe2o3 0.05-0.2 K2o 0.1-0.15 Tio2 0.15-0.2 Na2o 0.2-0.25 Soluble fe:
