Method and system for recycling metal of lithium secondary battery

A system for recycling a metal from a lithium secondary battery, the system comprising:

• an aluminum adsorption resin column;
• a flow rate control unit configured to supply distilled water to the aluminum adsorption resin column;
• an evaporation treatment unit configured to evaporate the distilled water passing through the aluminum adsorption resin column to produce water vapor;
• a distilled water regeneration unit configured to collect the distilled water from the water vapor generated from the evaporation treatment unit;
• and
• a distilled water supply unit configured to supply the distilled water regenerated from the distilled water regeneration unit to the flow rate control unit.

A method for recycling a metal from a lithium secondary battery, the method comprising:

• preparing a cathode active material mixture containing lithium;
• producing a lithium precursor by reducing the cathode active material mixture;
• forming a lithium precursor aqueous solution by dissolving the lithium precursor in water;
• passing the lithium precursor aqueous solution through an aluminum adsorption resin column to adsorb aluminum to the aluminum adsorption resin column;
• and
• injecting a first treatment liquid including distilled water into the aluminum adsorption resin column at a flow rate of 100 L/hr to 1,200 L/hr to obtain a second treatment liquid including aluminum desorbed from the first treatment liquid wherein a content of aluminum included in the second treatment liquid is 200 ppm or more and retrieving the aluminum from the second treatment fluid.