Alireza Javadi - Department of Engineering, University of Kashan, Kashan, Iran

Water is one of the important parameters in flotation and represents ۸۰–۸۵% of the volume of mineral pulp processed in flotation circuits. In our recent studies revealed was found that sulphide minerals generated H۲O۲ in pulp liquid during wet grinding and also the solids when placed in water immediately after dry grinding but effect of type of water on the oxidation of pulp components and hence in deteriorating the concentrate grade and recovery in flotation has not been explored yet. In this study, effect of two types of water on formation of H۲O۲ as an oxidizing agent stronger than oxygen was investigated. process water is water that is used for a flotation processes in Bama Company. It was shown that process water generated ۴۸۲ µM H۲O۲ but deionized water generated ۱۶ µM. The result shows recovery of chalcopyrite in pH ۶ is ۶۰% and ۴۰% in process water and deionized water respectively. Also, recovery of galena in pH ۶ is ۳۰% and ۲۰% in process water and deionized water respectively.

hydrogen peroxide, Oxidizing Agent, Pyrite, Process Water