该工艺较好地实现了银、镓、铁、锌等有价元素的综合回收。
Thus, this process has well realized the comprehensive valuable element recovery of silver, gallium, iron, zinc etc.
硫化锌精矿焙烧矿的中性浸出渣常含有锗等有价元素，常规低酸高酸两段浸出流程锗的直收率低。
Neutral leaching residue of roasted zinc concentrate often contains germanium which is poorly recovered in conventional two-stage leaching.
有元素化合价升降的反应是氧化还原反应。
The reaction in which the valence of elements raises or downs is REDOX reaction.
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