System for recovering valuable material from crucible used in production of positive electrode active material

A system for recovering a valuable metal from a crucible used to produce a positive electrode active material, the system comprising:

• a crucible input unit provided such that used positive electrode firing crucibles containing positive electrode material residue and lithium are placed thereon in a state in which openings of the crucible face downward, and are put into the system;
• a steam injection unit defining a chamber and configured to sequentially move the crucibles put into the chamber and to inject high-pressure to inside and outside of the crucibles to separately collect slurry;
• a solid-liquid separation unit configured to separate the slurry into solid and liquid, to discharge waste positive electrode material residue, and to separately collect a low-concentration lithium liquid phase;
• a lithium concentration unit configured to recover a high-concentration lithium liquid phase concentrated to a target concentration through heating reaction of the low-concentration lithium liquid phase and to separately discharge steam;
• and
• a steam supply unit configured to collect and reheat the discharged steam to a target temperature, and to supply high-pressure steam to the steam injection unit.