碳酸盐型卤水实验室模拟提锂和太阳池提锂的对比

摘要

The similarities and differences of lithium extraction from solar pond and 50 ℃ laboratory simulation are analyzed through a comparative study in this paper. It is found that the evaporation is the main factor for the differences of ion changes before and after brine experiments. The crystal minerals precipitated in the experiments mainly contain Li+and CO32−according to the result of chemical analysis. But it is much more in the solar pond experiment than that in simulation experiment. Through the preliminary analysis,the content of lithium carbonate crystal precipitated from the solar pond is 50%higher than that in the 50 ℃ simulation experiment. Temperature plays an important role in the process of lithium extraction. Stable salt gradient layer can effectively prevent heat loss from the lower convective zone, and can delay the precipitation of NaCl by diluting the ion concentration in the lower convective zone.%　　通过对比研究，分析了太阳池提锂实验和50℃模拟提锂实验的共性和差异。研究发现蒸发作用是导致实验前后卤水中离子变化差异的主要因素。通过化学分析，实验中析出的盐类矿物主要以 Li+和 CO32−为主，但是太阳池实验中盐类矿物的 Li+和 CO32−含量要比模拟实验高很多，通过初步分析计算，太阳池实验中析出的碳酸锂晶体含量要比50℃模拟实验高50%以上。温度在提锂过程中起到了重要作用，稳定的盐梯度层可以有效地阻止热量从下对流层散失，并且通过稀释下对流层中的离子浓度，可以延缓NaCl的析出。