Catalytic Oxidation Pretreatment of Sulfide-Rich Arsenic-Bearing Refractory Gold Concentrate by Hydrogen Peroxide in Sulfuric Acid in Tongling, China

Abstract

This paper summarizes the result of experiment that was fourced on investigation of oxidation pretreatment on sulfide mineral for leaching of refractory gold concentrate by hydrogen peroxide in sulfuric acid. For a viable option, extraction rate of Fe, Cu was low, but extraction rate of arsenic reached nearly 100%. As the result of oxidation, elemental sulfur was not produced.

Study on Removing As(III) by Oxidation and Precipitation from Acid-leaching Solution of Pyrite Cinder

“…, such as hydrogen peroxide oxidation [14] , potassium permanganate oxidation, sodium hypochlorite oxidation, chlorine water oxidation [15] , etc.. The reaction process is simple clean, and does not introduce impurities due to the characteristics of hydrogen peroxide, so it is widely used in the oxidation of As 3+ .…”