硫化矿物硫化钠诱导浮选的电化学研究

ELECTROCHEMISTRY OF Na 2S-INDUCED FLOTATION OF SULFIDE MINERALS

本文研究了黄铜矿，黄铁矿的硫化钠诱导浮选行为。浮选实验，电化学研究表明，黄铜矿表现出较差的硫化钠诱导浮选行为，而黄铁矿则很好。硫化钠诱导浮选机理是由于ＨＳ－离子在矿物表面氧化产生疏水性的元素Ｓ０所致；硫化矿表面静电位的高低决定了ＨＳ－氧化成Ｓ０的可能性，黄铁矿表面静电位Ｅｍｓ高于ＨＳ－氧化成Ｓ０的电极电位，因而黄铁矿表现出良好的硫化钠诱导浮选特性；黄铜矿表面静电位低于这一电极电位，因而硫化钠诱导浮选性较差。

The Na 2S-induced flotation behavior of chalcopyrite and pyrite has been investigated.In the light of flotation tests and electrochemical studies,pyrite exhibited good Na 2S-induced flotation,but that of chalcopyrite was depressed by Na 2S.It is the electrochemical mechanism of Na 2S-induced flotation that the electrochemical catalytic oxidation of HS -ion on the mineral surface is mainly responsible for the Na 2S-induced flotation.If the rest potential of mineral surface is higher than E HS -/S ,the oxidalion is responsible,or it is not.