This study focuses on the ore characteristics and occurrence status of lithium in lithium-poor clay-type ores by employing activation pretreatment by calcination followed by leaching with tartaric acid. This study investigates the influence of factors such as calcination temperature, calcination time, and leaching temperature on the leaching yield of Li. The findings show the optimal leaching conditions for Li extraction as follows: calcination temperature, 600 °C; calcination time, 5 min; leaching temperature, 100 °C; ore-tartaric acid mass ratio, 5:7; leaching time, 5 h; and ore-water ratio, 1:3 (g/mL), resulting in a leaching yield of Li of 85.0%. According to the results of the three-cycle leaching experiments, the Li concentration in the leach liquor increased from 40.2 mg/L to 125 mg/L, indicating efficient utilization of tartaric acid and successful Li enrichment. Moreover, the XRD, SEM, TG-DSC, and FTIR analyses of the samples reveal that tartaric acid dissociates into CHO and CHO, which then form complexes with ions such as Li, Al, Ca, and Fe that are dissolved during the ore leaching process. With an increase in leaching time, complexes involving Al, Ca, Fe, and tartaric acid radicals result in precipitation, leading to a reduction in the content of these ions in the leach liquor. This increases the selectivity of Li extraction, which is beneficial for the subsequent separation and extraction of Li.

中文翻译：

---

酒石酸煅烧水浸从贫锂粘土矿中浸出锂的研究


本研究采用煅烧活化预处理、酒石酸浸出的方法，研究了贫锂粘土型矿石的矿石特征和锂的赋存状态。本研究考察了煅烧温度、煅烧时间、浸出温度等因素对锂浸出率的影响。研究结果表明，锂提取的最佳浸出条件如下：煅烧温度，600 °C；煅烧时间，5分钟；浸出温度，100℃；矿石-酒石酸质量比，5:7；浸出时间，5 h；矿水比为1:3（g/mL），锂浸出率为85.0%。根据三循环浸出实验结果，浸出液中锂浓度从40.2 mg/L增加到125 mg/L，表明酒石酸得到有效利用，锂富集成功。此外，样品的 XRD、SEM、TG-DSC 和 FTIR 分析表明，酒石酸解离为 CHO 和 CHO，然后与矿石浸出过程中溶解的 Li、Al、Ca 和 Fe 等离子形成络合物。过程。随着浸出时间的增加，涉及Al、Ca、Fe和酒石酸根的络合物导致沉淀，导致浸出液中这些离子的含量减少。这增加了Li萃取的选择性，有利于后续Li的分离和萃取。