The invention provides a
lithium recovery and extraction method. The method mainly comprises the steps that
sulfuric acid is used for soaking
powder of matter to be recovered, obtained impregnation liquid is filtered, and the pH is adjusted;
solid alkali metal hydroxide is utilized for preparing a
saponification organic solvent; and the impregnation liquid is added into the
saponification organicsolvent, oscillation is performed, and then a water phase is collected. According to the method, the
solid alkali metal hydroxide is utilized for obtaining the
saponification organic solvent (an
oil phase), accordingly, a large amount of
alkali metal matter exists in the
oil phase, when the water phase impregnation liquid with a certain pH value is added into the
oil phase, the oil phase can be used for extracting a large amount of other elements while the
lithium element is kept in the water phase, an existing
lithium element extraction operation process is simplified, in addition, producingof a large amount of
precipitation of
hydroxide is avoided, accordingly, output of
sludge is controlled, a container is kept clean, and the aftertreatment load is greatly reduced; and in addition, theremnant oil phase after the lithium element is extracted can also be used for further separating other elements through acid
pickling, elements are recycled as much as possible, and meanwhile, the oil phase can be recycled.