从废旧氧化锌压敏电阻片中提取及制备氧化钴

摘要

Cobaltous chloride is extracted from waste ZnO varistors throughacid decomposition and purification.And then,spherieal Co3O4 powders,which meets enterprise standard can be obtained by introducing surfactant using NaHCO3 as precipitation agent. The selection of solution concentration,temperature in this process are discussed. Meanwhile,active ZnO can be obtained with this technology.%以废旧氧化锌压敏电阻为原料,经酸解、净化提取得CoCl2;并用碳酸氢钠为沉淀剂,引入表面活性剂,制备符合企业标准的球形氧化钴。并对该工艺过程中溶液浓度、温度等的选择进行了讨论。利用本工艺还可以制取活性ZnO。