在100 g钴矿加入39 mL浓硫酸、浸出温度80 ℃、浸出时间2 h、液固比2-1时,采用常规的硫酸浸出,钴浸出率仅为16.86%;当100 g钴矿中加入42.5 mL浓硫酸、在焙烧温度630 ℃、焙烧时间1.5 h的焙烧条件下,采用硫酸化焙烧后硫酸浸出,钴浸出率达到67.48%;在100 g钴矿中加入39 mL浓硫酸和56 mL浓硝酸、浸出温度60 ℃、浸出时间4 h、液固比为3-1时,采用硝酸氧化下硫酸浸出,钴浸出率为96.35%.
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