Patent ID: 11873540
Assignee: US BORAX INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  Y | IPC C

Claim 15:
16. A method of extracting lithium from a lithium-bearing material including:
(i) mixing the lithium-bearing material, gypsum, a sulfur-containing material, and a calcium-containing material and forming a feed mixture having a moisture content ranging from 20 to 60 wt %;
(ii) drying the feed mixture to form a dried mixture having a moisture content of less than 20 wt %;
(iii) supplying the dried mixture to a roaster;
(iv) roasting the dried mixture in the roaster and forming a roasted mixture including a water-soluble lithium compound;
(v) supplying the water-soluble lithium compound to a leach tank;
(vi) supplying an aqueous solution to the leach tank; and
(vii) leaching lithium from the water-soluble lithium compound and forming a lithium-containing leachate by mixing the aqueous solution and the water-soluble lithium compound in the leach tank.