废旧碱性锌锰电池综合回收钾、锌、锰

碱性锌锰电池是用量最大的原电池。废旧碱性锌锰电池被丢弃后,会对环境产生污染,其回收利用已越来越受到人们的重视。在实验室研究了水浸—煅烧—真空铝热还原处理废旧碱性锌锰电池的工艺,通过物相与元素含量分析,对处理后物料的物相存在形式及钾和锌的回收率进行了研究。研究结果表明,废旧碱性锌锰电池物料通过水浸可使99%的氢氧化钾回收;水浸渣经煅烧后得到的煅后渣主要物相为ZnO和ZnMn₂O₄;煅后渣经真空铝热还原,可将锌和锰还原,并可使98%的锌回收,还原渣的主要物相为氧化铝与铝锰合金。

Study on Comprehensive Utilization of Spent Zinc-Manganese Batteries

Alkaline zinc-manganese battery is the most used disposable battery, and it will pollute the environment after it is discarded. More and more attention of the recycling process of the spent zinc-manganese battery has been attracted with the increase of the battery usage. A recovery and utilization process of spent zinc-manganese battery was studied in the laboratory. The existent form of processed materials and the recovery ratio of potassium and zinc were studied. The results showed that more than 99% of potassium hydroxide could be recovered when the spent alkaline zinc-manganese battery materials was leached by water. The main phases of calcined slag were ZnO and ZnMn₂O₄. After calcined slag was processed by vacuum aluminothermic reduction, zinc and manganese could be reduced, and more than 98% of zinc could be recovered. The main phases of reduction slag were alumina and aluminum manganese alloy.