METHOD FOR EXTRACTING LITHIUM BY EVAPORATION

摘要

The invention relates to a method for extracting lithium contained in a brine, in which: i. a first evaporation rate (T1) of the brine is defined, said rate being less than the evaporation rate enabling undesirable salts to be precipitated; ii. some of the initial brine is fed into an evaporation tank, and the concentration of the brine is controlled by stopping the evaporation when the evaporation rate of the brine reaches the first evaporation rate (T1); iii. a mixture is then formed by reinjecting the concentrated brine from the previous step into some of the initial brine; iv. steps i through iii are repeated, the initial brine portion being replaced with the mixture until a lithium-enriched brine having an evaporation rate equal to a predefined second evaporation rate (T2) is obtained; and v. precipitation of lithium contained in the lithium-enriched brine is brought about.