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| Optimization design of an airflow vortex micronizer and enhancement of spheroidization efficiency for natural graphite |
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Received:August 10, 2025
Revised:September 06, 2025
Accepted:October 21, 2025
Published Online:April 30, 2026
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| DOI：10.3969/j.issn.1005-7854.2025.05.010 |
| KeyWord:natural graphite;spheroidization;spherical graphite;airflow vortex micronizer;multi-layer crushing disk |
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| 1.School of Resources and Environmental Engineering, WuHan University of Technology, WuHan 430070, China;2.Key Laboratory of Green Utilization of Critical Non-Metallic Mineral Resources, Ministry of Education, WuHan 430070, China;3.Hubei Key Laboratory of Mineral Resources Processing and Environment, WuHan 430070, China |
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| 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. |
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