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发明公开
CN1345981A 热酸浸出－铁矾法炼锌工艺中锗和银的富集方法 无效 - 撤回

热酸浸出－铁矾法炼锌工艺中锗和银的富集方法
摘要：
一种从锌焙砂中富集锗和银的方法。采取改进传统热酸浸出——铁矾法炼锌工艺,更换沉铁试剂和采用循环浸出——部分开路的方法富集锗和银。本发明的优点是不需要增加设备投资,从锌焙砂到富集渣,锗的直接回收率≥88%,总回收率≥90%,银的直接回收率≥90%,富集渣锗≥300g.t－1、银≥1500g.t－1,而对原湿法炼锌系统没有负面影响,所产铁矾渣富含钾、锌等肥素,可用于制备复合肥,从而大幅度地减少废渣量,有利于环境保护。
摘要（英）：

The method for concentrating germanium and silver from zinc calcined ore is characterized by adopting improved traditional thermal pickling-iron vitriol method and zinc-smelting process, changing iron precipitation reagent and utilizing circulation leaching-partial opening method to concentrate germanium and silver. Said invention has no need of increasing equipment investment, can directly concentrate germanium and silver, the direct recovery rate of germanium is greater than or equal to 88%, its total recovery rate is greater than or equal to 90%, and the direct recovery rate of silver is greater than or equal to 90%, the concentrated slag germanium is greater than or equal to 300g.t (-1) and silver is greater than or equal to 1500 g.t(-1). The iron vitriol slag produced by said invented method contains rich fertilizer elements of potassium and zinc, can be used for preparing composite fertilizer.

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