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| Effect of Phase Transformation of Spodumene on Extraction of Lithium |
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Received:November 20, 2023
Revised:November 27, 2023
Accepted:December 11, 2023
Published Online:April 16, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.05.009 |
| KeyWord:spodumene; phase transformation; crystal transformation; lithium extraction |
| Author | Institution |
| SHAO Xueqing |
新疆有色金属研究所 |
| XIA Yongzhong |
新疆有色金属研究所 |
| CHAO Qun |
新疆有色金属研究所 |
| KONG Lingna |
新疆有色金属研究所 |
| YANG Qinyan |
新疆有色金属研究所 |
| MA Wenqing |
新疆有色金属研究所 |
| WANG Zhen |
新疆有色金属研究所 |
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| Abstract: |
| The crystal transformation roasting of spodumene is the prerequisite and basis of traditional lithium extraction process. Thermodynamic analysis of the transformation of α-spodumene to β-spodumene was carried out. The relationship between Gibbs free energy and temperature was simulated by HSC software. Combined with the thermogravimetry analysis (TG), it is proved that the calcination temperature of α-spodumene should be higher than 800 ℃ to cause crystal transformation, and it is verified that the calcination temperature is the key factor affecting the crystal transformation. The effects of different roasting conditions on the leaching rate of lithium were investigated. The results show that the crystal conversion rate of spodumene is 98.94% and the leaching rate of lithium is 97.88% under the conditions of roasting temperature of 1 050 ℃ and roasting time of 60 min. The phase and morphology of spodumene were analyzed by XRD and SEM. |
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