Rotary kilned calcined bauxite suppliers 1. Calcined bauxite AL2O3:70% min. FE2O3:2% max. SIZE: 15MM 90% min. china calcined bauxite manufacturer since 1999 purity of al2o3 75%90% rotary kiln calcined bauxite selfowned bauxite mines Specifiions of Calcined bauxite Specifiions of Calcined bauxite