METHOD FOR RECOVERING METAL FROM ELECTRODE MATERIAL

• Main Authors: LEE, HYUN WOO, LEE, HA YOUNG, PARK, SUNG KOOK, PARK, KWANG SEOK
• Format: Patent
• Language: English; Korean
• Published: 27.02.2014
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present invention relates to a method for collecting a metal from an electrode material comprising: a step for forming a manganese precipitate and a solution where lithium is dissolved by mixing a weak acid solution and an electrode material including lithium and manganese; a step for filtering and separating the manganese precipitate; a step for forming a lithium hydroxide solution and a weak acid calcium precipitate by mixing the solution where lithium is dissolved and a calcium compound; and a step for forming lithium carbonate by mixing the lithium hydroxide solution and the carbon compound. [Reference numerals] (AA) Lithium manganese oxide; (BB) Oxalic acid aqueous solution; (CC) Leaching/Filtering; (DD) Lithium oxalate aqueous solution (Filtrate); (EE) Quicklime (CaO); (FF) Reacting/Filtering; (GG) Lithium hydroxide (Filtrate); (HH) Carbon dioxide; (II) Reacting/Filtering/Drying; (JJ) Lithium carbonate; (KK) Manganese oxalate precipitate (Filtered residue); (LL) Calcination (>1000 °C); (MM) Trimanganese tetroxide