| 摘要 |
<p>PURPOSE:To provide a method for recovering a valuable material from a scrapped nickel hydrogen occluding alloy secondary battery arranging a hydrogen occluding alloy at a negative electrode. CONSTITUTION:The scrapped nickel hydrogen occluding alloy secondary battery is cut into 5-20mm length under a water curtain. The cut material content capable of being made into a slurry with a ball mill or by imparting ultrasonic wave is taken out in water as the slurry. A part incapable of being made into the slurry is separated from the slurry and is offered to a steel raw material of ferronickel or the like. The slurry is further separated into a crude hydrogen occluding alloy part and a crude nickel hydroxide part by the difference of specific gravity. The crude hydrogen occluding alloy part is recovered as a hydrogen occluding alloy powder by cleaning with an organic solvent and drying. The nickel hydroxide part is chemically treated to recover a nickel compound or the like. As a result, the valuable material is efficiently and easily recovered.</p> |
