【摘要】 石墨作为锂离子电池主流负极材料，其球形化加工质量对电池性能具有重要影响。针对传统单盘涡轮微粉机在天然石墨球形化过程中存在的工艺流程长、成球率偏低等问题，本文通过设备结构优化，将单层粉碎盘改造为多层粉碎盘结构，并系统研究了多层粉碎盘涡轮微粉机的球形化工艺参数。研究确定了较优的球化工艺参数组合：粉碎阶段为粉碎盘转速2 400 r·min^-1、内分级轮转速3 000 r·min^-1、粉碎次数4次，该条件下粉碎产品产率达91.86%，振实密度为0.692 g·cm^-3；整形阶段为粉碎盘转速2 400 r·min^-1、内分级轮转速2 000 r·min^-1、外分级轮转速1 100 r·min^-1、整形次数8次，最终球形石墨产品产率为45.61%，振实密度提升至0.998 g·cm^-3。与传统单层粉碎盘工艺相比，多层粉碎盘结构可减少整形次数3次，同时将球形石墨产率提高3%～5%，为天然石墨球形化技术的节能增效提供了可行路径。更多还原

【Abstract】 Graphite is a predominant anode material for lithium-ion batteries, whose performance is significantly influenced by the quality of the spheroidized graphite. To address the issues of long process flow and low spheroidization yield in traditional single-disk vortex micronizers during natural graphite processing, this study introduces an optimized equipment structure that replaces the single-layer crushing disk with a multi-layer configuration. A systematic investigation was conducted on the spheroidization process parameters of the multi-disk vortex micronizer. The optimal spheroidization parameters were determined as follows: in the crushing stage, a disk speed of 2 400 r · min^-1, an internal classification wheel speed of 3 000 r · min^-1, and four crushing cycles, resulting in a product yield of 91.86% and a tap density of 0.692 g · cm^-3; in the shaping stage, a disk speed of 2 400 r · min^-1, an internal classification wheel speed of 2 000 r · min^-1, an external classification wheel speed of 1 100 r · min^-1, and eight shaping cycles, yielding a final spherical graphite product with a yield of 45.61% and a tap density of 0.998 g · cm^-3. Compared with the conventional single-disk process, the multi-disk structure reduces the number of shaping cycles by three and increases the yield of spherical graphite by 3%–5%, providing a viable pathway for energy saving and efficiency improvement in natural graphite spheroidization technology.更多还原