Process for enriching germanium and silver in zinc smelting process of heat acid leaching-ferro-alum method


Application Number: 00126604
Application Date: 2000.09.25
Publication Number: 1345981
Publication Date: 2002.04.24
Priority Information:
International: C22B3/08;C22B3/20
Applicant(s) Name: Zhongnan Univ.
Address:
Inventor(s) Name: Liu Zhongqing;Tang Motang;He Jing
Patent Agency Code: 43200
Patent Agent: gong canfan
Abstract 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.