Turnkey Process Equipment Solutions

Conversion of Salt Lake Brine into Battery Grade Li₂CO₃

We provide complete process system for the production of lithium carbonate slurry used in battery manufacturing

To produce battery-grade lithium carbonate from salt lake brine, a purified lithium chloride solution is first prepared. This lithium chloride solution is then mixed with a sodium carbonate solution in a controlled-temperature precipitation tank, triggering the formation of lithium carbonate slurry with high sodium chloride content. After the initial precipitation, the slurry undergoes primary centrifugation to separate crude lithium carbonate.

The separated lithium carbonate is transferred to the first washing tank, where it is mixed with a proportioned secondary washing solution. The resulting slurry is then sent through a second centrifugation to improve product purity. A final wash with purified water is carried out in a second washing tank, followed by a third round of centrifugation to obtain high-purity lithium carbonate.

Afterward, the product goes through drying, screening, iron removal, milling, blending, and packaging, yielding battery-grade lithium carbonate. The secondary washing liquid recovered during centrifugation is reused in the sodium carbonate dissolution step, while the lithium-depleted mother liquor from the initial separation can be processed via acidification and evaporation crystallization to recover sodium chloride as a by-product.