Method for recovering water soluble manganese and magnesium from electrolytic manganese residue

The invention discloses a method for recovering water soluble manganese and magnesium from electrolytic manganese residue. The method comprises the following steps: firstly, soluble salt in the electrolytic manganese residue is dissolved with water; secondly, by utilizing the manganese combining capability of chelating resin , which is far stronger than the magnesium combining capability of the chelating resin, a liquid is allowed to flow through a chelating resin column, manganese is absorbed and then flows out along with an outgoing liquid; and after absorbing the manganese, a resin-used sulfuric acid liquid is eluted to recover, thus the manganese is changed into a manganous sulfate liquid and enters into the liquid preparation procedures for an electrolytic manganese production system, and also can be used to prepare manganese salt. Liquid ammonia and ammonium carbonate are added into the outgoing liquid absorbing the manganese to enable the magnesium to deposit; alkali magnesium carbonate is obtained via