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Preparation of Battery-Grade Lithium Carbonate from Calcium-Magnesium Slag in Spent Li-Ion Battery Recycling Process
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Liang CHEN1, Changliu XIANG1, Yao ZHOU1, Xiaoxin YI1, Zexin HU1, 2
Mining and Metallurgical Engineering | 2024, 44(4) : 115 - 119
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Mining and Metallurgical Engineering | 2024, 44(4): 115-119
• SPECIAL ISSUE: BATTERY MATERIALS •
Preparation of Battery-Grade Lithium Carbonate from Calcium-Magnesium Slag in Spent Li-Ion Battery Recycling Process
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Liang CHEN1, Changliu XIANG1, Yao ZHOU1, Xiaoxin YI1, Zexin HU1, 2
Affiliations
  • 1.Gold Shine Energy Material Co., Ltd., Changsha 410203, Hunan, China
  • 2.Hunan Changyuan Lico Co., Ltd., Changsha 410205, Hunan, China
Published: 2024-08-01 doi: 10.3969/j.issn.0253-6099.2024.04.022
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With the calcium-magnesium slag generated in recycling process of spent Li-ion batteries as raw material, battery-grade lithium carbonate was prepared by adopting a process consisting of leaching for decomposition, purification, lithium precipitation and carbonization for decomposition. The results show that with the addition of MgSO4·7H2O at 1.1 times of the theory amount, initial pH of 1.5, reaction time of 2.0 h, solid-liquid ratio of 1∶6, reaction temperature of 90 ℃, and final pH of 3.5, the leaching rate of Li can reach 98.39% and the mass concentration of Li in the lixivium is 18.03 g/L. Then, the obtained lixivium is subjected to processes of defluorination with resin, impurity removal with NaOH, and Na2CO3 precipitation, and crude lithium carbonate can be obtained with purity of 95.11%. By adopting a process consisting of carbonization, removal of calcium and magnesium with resin, and pyrolysis, a battery-grade lithium carbonate with purity of 99.64% can be prepared. It is shown that by using this processing technique, the lithium recovery rate can reach 95.08%, presenting good prospect in industrial application.

spent Li-ion battery  /  leaching  /  purification  /  carbonization for decomposition  /  battery-grade lithium carbonate  /  battery recycling  /  calcium-magnesium slag
Liang CHEN, Changliu XIANG, Yao ZHOU, Xiaoxin YI, Zexin HU. Preparation of Battery-Grade Lithium Carbonate from Calcium-Magnesium Slag in Spent Li-Ion Battery Recycling Process[J]. Mining and Metallurgical Engineering, 2024 , 44 (4) : 115 -119 . DOI: 10.3969/j.issn.0253-6099.2024.04.022
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Year 2024 volume 44 Issue 4
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doi: 10.3969/j.issn.0253-6099.2024.04.022
  • Receive Date：2024-03-24
  • Online Date：2026-03-18
  • Published：2024-08-01
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  • Received：2024-03-24
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Affiliations
    1.Gold Shine Energy Material Co., Ltd., Changsha 410203, Hunan, China
    2.Hunan Changyuan Lico Co., Ltd., Changsha 410205, Hunan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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