氧气在黄铁矿上的还原机理及黄药的影响

来源期刊：中南大学学报(自然科学版)1988年第5期

论文作者：李世丰 刘德朱

文章页码：500 - 506

关键词：黄铁矿； 电化学处理； 旋转电极； 圆盘电极； 黄原酸盐； 浮游选矿； 浮选药剂； 氧； 还原反应/旋转盘-环电极

Key words：pyrite； electrochemical treatment； rotation electrodes； disk electrodes； xanthogenate； floating separation； floating agents； oxygen； reduction reaction/rotation disk-ring electrodes

摘    要：采用旋转盘-环电极及他种电化学处理方法,研究氧气（O₂）在黄铁矿表面的还原机理,实验结果表明:在pH值为9.1的0.05MNa₂B₄O₇溶液中,氧气在黄铁矿表面还原时,用或不用黄药,都分两步进行,有中间产物O^-_2，ads和O^2-_2,ads,反应电子数n_e1=n_e2=2,黄药的存在能加速氧气被黄铁矿表面吸附及还原作用。

Abstract: Rotating Disc-Ring electrode technique and other electrochemistry measure-ment methods are used to investigate the mechanism of O₂ reduction on the sur-face of pyrite.Experiment results show that when O₂ is reduced on the surfaceof pyrite in pH 9.1,0.05M Na₂B₄O₇ solution with or without Xanthate,the rea-ction takes two charge steps and the medium product is O_2,ads^2-,the number ofthe reaction electron is n_e1=n_e2=2.The existance of Xanthate catalyzes the adsor-ption and reduction of O₂ on the surface of pyrite.