Waste lithium battery rare metal recovery method

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The present invention relates to a method of recovering rare metal from a spent lithium battery, comprising : a disassembly process of disassembling a spent lithium battery in order to extract a negative terminal cell, a positive terminal cell, and a separation film to separate the cells from each other; a separation film recovery process of molding the separation film in a fixated size for recovery when melting the separation film at 120-200° C; a negative terminal cell recovery process of recovering rare metal by stirring the negative terminal cell in a state of being submerged in water at a temperature of 60-100° C; and a positive terminal cell recovery process of implementing heat treatment of the positive terminal cell with radiant heat at a temperature of 200-500° C and stirring the positive terminal cell in a state of being submerged in water at room temperature to recover rare metal. As such, the method of recovering rare metal from the spent lithium battery is able to improve an existing process into a simple and stable process at low costs and is able to contribute in preventing an overall environmental contamination and national competitiveness security by maximizing a recovery rate of the rare metal contained in the spent lithium battery.(AA) Pellet(BB) Thin copper film(CC) Negative electrode active material(DD) Thin aluminium film(EE) Positive electrode active material(FF) Separation film melting(GG) Melt extrusion(HH) Melt molding(S10) Spent lithium battery(S12) Case hole(S14) Brine submerging(S16) Case cutting(S20) Separation film(S30) Negative cell(S32) Ethanol soaking(S34) Hot water submerging(S36) Sediment filtering(S40) Positive cell(S42) Positive cell cutting(S44) Radiant heat carbonization(S46) Room temperature water submerging(S48) Sediment filtering(S49) Positive electrode active material calcinationCOPYRIGHT KIPO 2018