鉱物処理

[2P0121-29-01] Effects of solution composition on anodic polarization curves of CuFeS₂ in acidic chloride solutions (発表者：博士課程)

○ｸﾞｴﾝ ﾃｨ ﾌﾝ ﾀｵ¹、Jeon Sanghee¹、Park Ilhwan¹、Tabelin Carlito Baltazar²、伊藤 真由美¹、広吉 直樹¹ (1. 北海道大学、2. ニューサウスウェールズ大学)

キーワード：chalcopyrite、ferrous、cupric、chloride、proton

Effects of solution composition (Fe²⁺, Cu²⁺, Cl^-, and H⁺ concentrations) on the anodic polarization curves of chalcopyrite in acidic chloride solutions were studied using the conventional three-electrode system at 25 ^oC under N₂ atmosphere. An active-passive behavior was obtained in all examined conditions, i.e., the current increased with increasing redox potentials to reach a peak at a certain redox potential, then it decreased at higher redox potentials. At all applied redox potentials, the current increased with increasing Fe²⁺, Cu²⁺, and Cl^- concentrations and decreased with increasing H⁺ concentrations. Based on the results, the mechanism of chalcopyrite dissolution was discussed.