| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for recycling waste batteries, capable of suppressing cost and energy needed for recycling treatment and improving recovery percentage of lithium included in the waste batteries. <P>SOLUTION: In a method for recycling waste batteries, crushed objects obtained by crushing waste batteries are subjected to a first heating treatment for heating the objects in a heating furnace, and a metal-containing substance is recovered from the crushed objects. In the method, crushed objects including lithium are used as the crushed objects, the first heating treatment is performed in conditions where the maximum temperature T1 (°C) is set at 730°C or above, and P<SB POS="POST">CO2</SB>/(P<SB POS="POST">CO2</SB>+P<SB POS="POST">CO</SB>), which is represented by a CO<SB POS="POST">2</SB>partial pressure P<SB POS="POST">CO2</SB>(atm) and a CO partial pressure P<SB POS="POST">CO</SB>(atm), and the CO<SB POS="POST">2</SB>partial pressure (atm) in an atmosphere satisfy predetermined expressions, and a lithium carbonate is recovered when the metal-containing substance is recovered. In the case, the lithium carbonate is preferably recovered from gas generated by the first heating treatment while the maximum temperature T1 is set at 1,320°C or above. <P>COPYRIGHT: (C)2013,JPO&INPIT |
