Recovery of Zinc from Galvanized Scraps

Authors : Serdar AKTAŞ, Ercan AÇMA

Pages : 395-402

View : 9 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The stripping of Zn in sulfuric acidic solutions from galvanized steel products obtained from industry and the removal of impurities from this solution and the conditions required for Zn recovery were experimentally investigated. According to the results,it is possible to completely strip Zn from used galvanized steel products by using sulfuric acid with a pH value of up to 0.2. A solution that contains Zn over 80-85 g/l and Fe 0.2 g/l can be produced by repeated stripping and it is possible to obtain ZnSO4 from the solution by adding volatile liquid insert ignore into journalissuearticles values(ethyl alcohol);. The precipitated Zn compound is ZnSO4.H2O. This compound contains 36.4% Zn and 0.002% Fe and is a raw material pure enough for commercial use. The ethyl alcohol used to obtain ZnSO4.H2O from the rich stripping solution is recovered with 90% efficiency through distillation at 78oC for 20 min. This process optimized by the experiments allows for the manufacture of saleable products and causes no environmental problems.
Keywords : Galvanize, Scrap, Stripping, Zinc Salt