一种从锂矿中回收锂的方法及其应用
By combining lithium ore with sodium sulfate, ferric sulfate, and calcium oxide through mixed roasting and extracting with HBL121 and 12-crown ether-4 extractants, the problems of high energy consumption and low extraction rate of existing lithium ore extraction methods have been solved, achieving efficient and low-cost lithium resource recovery and producing high-purity lithium carbonate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FANGYUAN ENVIRONMENG CO LTD
- Filing Date
- 2023-07-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium extraction methods from lithium ore suffer from problems such as high energy consumption, low lithium extraction rate, stringent process requirements, and high equipment corrosivity. Furthermore, the extractants commonly used in extraction methods are prone to corroding equipment under acidic conditions, resulting in significant lithium loss.
Lithium ore was roasted with sodium sulfate, ferric sulfate, and calcium oxide to produce lithium sulfate and lithium oxides. These were then extracted with HBL121 and 12-crown ether-4 extractants. High-purity lithium carbonate was prepared by multi-stage countercurrent extraction and back-extraction.
By increasing the lithium leaching rate to over 94% under low-temperature roasting conditions, energy consumption is reduced, equipment corrosion is decreased, lithium extraction rate and purity are improved, the purity requirements for battery-grade lithium carbonate are met, and the efficient recycling and utilization of lithium resources are promoted.
Smart Images
Figure CN116814986B_ABST