以中低品位氧化锌矿和工业级硫酸铵为原料,采用硫酸铵焙烧法提取氧化矿中的锌,通过正交实验研究了常压下硫铵焙烧氧化锌矿过程中焙烧温度、焙烧时间、铵矿比对Zn2+提取率的影响,通过SEM、XRD等分析手段,得出-200目的氧化锌矿在铵矿比n=1.4、焙烧温度425℃、焙烧时间90min的条件下,Zn2+提取率可达92％.同时,探讨了溶出温度、溶出时间、搅拌强度、液固比对Zn2+提取率的影响,得到了溶出过程的最佳工艺参数:溶出温度90℃、溶出时间60min、搅拌强度400r/min,液固比4∶1.锌以可溶盐的形式富集在提取液中,而硅、铅、锶等元素富集在渣中,实现了锌与硅、铅、锶的分离.
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