In this research, the properties and characteristics of Biglar refractories bauxite mines have compared with two types of industrial China's and Iranian (Doplan super) refractory grade bauxite in order to use in refractory industries. At first, physical, chemical and thermal properties, phase and microstructural characteristics have been measured and sintered samples of Biglar Bauxite at different temperatures were analyzed and then were compared with China's and Doplan calcined bauxite properties. The results showed that the refractory bauxite minerals obtained from Iranian Biglar mines contains the proper amounts of alumina and other oxides. So it could be concluded that these properties are comparable to the China's and Doplan bauxite and this refractory grade bauxite is suitable for refractory industries for using in the production of many kinds of shaped and monolithic refractory product.