Closed mechanical mill for ultrafine grinding in lithium manganate cathode material production line

With continuous policy support for the new energy vehicle industry and breakthroughs in key technologies such as energy density and cycle life of lithium manganate batteries, the market penetration of lithium manganate as a cathode material for power batteries has significantly increased. According to industry forecasts, the global demand for lithium manganate power batteries will exceed 500,000 tons by 2025, with the refinement of processing technology becoming a critical factor limiting further improvements in product performance. In the lithium manganate preparation process, crushing and classification, as a core step in the downstream process, can effectively enhance the tap density (≥2.3 g/cm³) and lithium-ion migration rate of the cathode material by precisely controlling the particle size distribution (D50 ≤ 5 μm) and particle morphology (sphericity > 85%), thereby optimizing the battery's rate performance and cycle stability (>2000 cycles @ 80% capacity retention).

Advantages of Ultra-Fine Classifying Impact Mills in the Battery Industry

The closed-circuit system integrates ultra-fine grinding and trace moisture control. This fully enclosed system enables ultra-fine grinding and pneumatic conveying while controlling the moisture content increase in the final product, ensuring a dust-free production process. This technology effectively combines ultra-fine grinding with trace moisture control on the surface of ultra-fine particles, addressing the current challenges that limit battery lifespan and safety. It represents a major breakthrough in the field of ultra-fine powder preparation for battery materials.

Currently, this equipment has been scaled for use in leading enterprises such as Ganfeng Lithium and Easpring Material Technology. Production line data show that when processing lithium manganate precursors with a particle size of D97 = 20 μm, the single-unit capacity can reach 1000–2000 kg/h, with the specific surface area of the final product stabilized at 12–15 m²/g, fully meeting the interfacial reaction activity requirements of high-nickel batteries for cathode materials.