Production of cobalt oxide powder by solvent extraction was begun in 1984 in Jinchuan Nonferrous Metals Complex, with the feed of cobalt slag from the purification of nickel electrowinning.

• 金川公司萃取工艺流程处理镍电解净化钴渣生产氧化钴粉始于1984年，1985年生产趋于稳定。