Recovery process
AssigneeLI-Technology Pty Ltd.
InventorsGary Donald Johnson, Mark Daniel Urbani, Nicholas John Vines
Life of this patent
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Abstract
A process for the recovery of lithium from lithium bearing mica rich minerals, the process comprising passing an ore containing one or more lithium bearing mica rich minerals to at least one pre-treatment step, passing the pre-treated ore to an acid leach step thereby producing a pregnant leach solution, subjecting the pregnant leach solution to a series of process steps in which one or more impurity metals are removed, and recovering lithium as a lithium containing salt product.
Claims26
A process for the recovery of lithium from lithium bearing mica rich minerals, the process comprising passing an ore containing one or more lithium bearing mica rich minerals to at least one pre-treatment step, passing the pre-treated ore to a leach step in which concentrated sulfuric acid is added under atmospheric conditions thereby producing a leach slurry that is in turn passed to a solid liquid separation step, the separation step producing a leach residue and a pregnant leach solution, subjecting the pregnant leach solution to a series of process steps in which one or more impurity metals are removed, including precipitating alunite in a low pH impurity removal step, and recovering lithium as a lithium containing salt product.
Dependencies are inferred from the claim text.