MCC Changtian focuses on the field of new energy battery materials. Based on the manganese-based new energy battery material industry chain, it is committed to the research and application of engineering technology for battery-grade manganese compounds. It has developed a deep separation technology for calcium and magnesium by fluorination (engineering), which has been successfully applied to the battery-grade high-purity manganese sulfate project of Guizhou Energy and Minerals Manganese Industry. This has solved the engineering problem of deep purification of calcium and magnesium, improved the quality and performance of new energy battery materials, and promoted the high-quality development of the industry.