The optimisically roasting conditions,such as,the ratio of sodium nitrate weight to cobalt slag weight,roasting temperature and time, are 0.

• 根据硫酸钠熔炼法处理废合金所得钴渣组成特点,通过氧化焙烧、酸分解、水解除杂、沉钴和煅烧等工序制取氧化钴。