Experimental Study on Recovery of Manganese from Wastewater of Vanadium Extraction

Using the process of chemical removal of impurities-electrolysis,manganese in the wastewater produced from vanadium extraction was successfully recovered.The effects of different factors（ferrisulphas addition,reaction temperature and time,terminal reaction pH） on removal of vanadium from the wastewater were studied,and the optimum vanadium removal parameters of 1.2 for molar ratio of Fe to V,60 ℃ of reaction temperature,40 min of reaction time and 6～7 of terminal reaction pH were determined.The cyclic voltammetry test results show that the wastewater after impurities removal has similar electrochemical properties with standard manganese electrolytic solution.The metallic manganese with a purity of 99.90%,and a current efficiency of 71.8% were obtained by electrolysis of the wastewater after impurities removal.The XRD results show that the obtained metallic manganese is of cubic and α-Mn crystal forms.