The bauxite ore extracted from mines can also be divided into three distinctive types, depending upon the percentage of Alumina content and the requirements for the particular products or industry. Low grade bauxite contains on an average 48 to 52 percent Alumina, medium grade bauxite contains 50 to 54 percent Alumina, while high grade bauxite comes with about 58 to 60 percent of Alumina content (ARCEL, 2010). A typical composition of bauxite includes 56 percent of Al2O3, 10 percent of Fe2O3, 2 percent of TiO2, 7 percent of SiO2, and 25 percent of water or organics1.
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