Lithium carbonate extraction from salt lake brine

Among the global lithium resources, salt lake-type lithium deposits are very important deposit types, accounting for about 60% of the global lithium resources. Compared with the preparation of lithium carbonate from spodumene, the preparation of lithium carbonate from salt lake brine not only has a higher content of lithium, but also has abundant resources, low energy consumption and low product price. The main research direction of salt.

When it comes to extracting lithium from brine, we need to talk about two definitions

The first is "brine", which is liquid salty water with a salt content greater than 5%;

The second is "salt lake", specifically referring to lakes with high salinity in arid areas;

Depending on the concentration, the ratio of magnesium to lithium is different, and the methods for extracting lithium carbonate from different salt lakes are different. Lithium extraction from salt lakes with high concentrations and low magnesium ratios generally uses the precipitation method and the solar pool method.

Lithium extraction from low-concentration high-magnesium-lithium ratio brine generally uses extraction methods, calcination methods, adsorption methods, and membrane methods, etc., usually in combination with multiple methods.

To sum up, it can be seen that the rapid development of new energy sources in China, the demand for lithium resources, and the concentration of lower-grade brine have forced China's salt lake lithium extraction technology to advance. At present, our salt lake lithium extraction technology has become the world's leading technology.