| 摘要 |
PROBLEM TO BE SOLVED: To recover reusable material by one crushing by roasting used lithium batteries, crushing, and magnetically separating a magnetic material and a non-magnetic material. SOLUTION: Used lithium battery raw material 1 is roasted with a roasting furnace 3, crushed with a crushing machine 2 in to the dimensions suitable for magnetic separation. A magnetic material in the crushed materials is separated from a non-magnetic material with a magnetic separator 7, then they are separately sieved with a sieving machine 8. In the roasting of the raw material 1, an organic material is decomposed, burned, and vaporized to generate CO gas. In low temperature roasting, reduction of metallic lithium by CO gas is insufficient, load in rushing is made large, and in high temperature roasting, the raw material 1 is melted and coagulated to make crushing difficult. Roasting at 800-1000 deg.C is preferable. The magnetic material and the non-magnetic material are magnetically separated, the magnetic material is used as a heat resistant alloy material and the non-magnetic material is used as the raw material of copper. In the sieving machine 8, the magnetic material is separated into powdery cobalt and plate-shaped or block iron component, and the non-magnetic material is separated into foil-shaped copper and powdery aluminum. Reusable materials are recovered and load in crushing is lightened. |
