Views: 309 Author: VV Publish Time: 2016-09-07 Origin: Rech Chemical Co. LTD
Reproduction zinc sulfate and silver from discarded silver-zinc battery is also a way of improving resource utilization. In Chemical industry, the maximization of the energy and efficiency draws the most attention, which is accord with the construction policy of modern Chinese society, Energy saving and environment friendly.
In silver-zinc battery scrap, silver contains 52.55%, zinc 42.7%. Zinc is used as the cathode and the silver oxide is used as anode coated on copper mesh skeleton. The recycle of silver-zinc battery waste is mainly based on the techniques of dilute sulfuric separately acid leaching zinc and copper. The refined silver is directly melt into silver ingot; In the process of dilute sulphuric acid leaching, copper liquid and zinc liquid are separately crystallization concentrated into copper sulfate pentahydrate and zinc sulfate.
By the way of recycle wasted silver zinc batteries, zinc recovery rate could reaches >98%, the silver recovery rate 98%, silver ingots purity > 99%. Although made from different raw material sources, like Rongqing chemical's production of zinc sulfate process, the production technology of zinc sulfate is still sulfuric acid method.