With the depletion of high quality and single barite ore, most barite ore in China is of low grade, closely associated with other metallic ore and non-metallic ore, which directly affects its utilization value in industry. The barite weighting agent used for drilling mud generally requires fineness above -0.056mm, density >4.2g/cm3, grade >95%, soluble salt content 98%, CaO content <0.36%, and is not allowed to contain magnesium oxide, lead and other harmful components. Different uses of barite barite purity, whiteness, impurity content requirements are different.