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O2-2,ads,反应电子数ne1=ne2=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 O2,ads2-,the number ofthe reaction electron is ne1=ne2=2.The existance of Xanthate catalyzes the adsor-ption and reduction of O2 on the surface of pyrite.