<報文>黄鉄鉱浮選における活性反応の自然電位

概要

論文の詳細を見る
By measuring of the mixed potential of the pyrite electrode in the solution containing silver and copper ions, the mechanism of activation in pyrite flotation systems was investigated. The following results were obtained. 1. In the solutions containing silver nitrate, the mixed potentials of pyrite were approximately equal to the equilbirium potential of the metallic silver electrode. It was considered that the mixed potential of pyrite was governed by cathodic reactions. 2. In the solution containing cupric nitrate, the mixed potential of pyrite in a steady state satisfied Nernst's equations with respect to pCu. These potentials were approximately 100 mV lower than the equilibrium potential of CuS/Cu^<2+>. 3. When the solution containing cupric nitrate was degassed with nitrogen, neither change of pH nor formation of sulfate ion was observed in the presence of pyrite powders. However, when the solution containing air, lowering of pH and formation of sulfate ion were observed in the aqueous suspension of pyrite.
東北大学の論文
1972-03-25