A method for CO2 treatment of the annealed lithium-containing materials for the production of lithium carbonate

The invention relates to a process for the production of lithium carbonate from lithium-containing minerals, with the steps a) annealing the crushed minerals at 950 to 1,200 ° C in oxygen-containing gas stream to convert the lithium-containing mineral phase in β-spodumene b) digestion of the minced β-spodumene mineral phase in aqueous suspension under pressure with CO c) concentrating the solution and precipitation of the lithium carbonate lithiumhydrogencarbonathaltigen There are obtained lithium digestion rates of> 80% and purities of lithium carbonate of> 95%.