Fe溶液中毒砂化学氧化动力学研究(英文)  

Chemical Oxidative Kinetic Study of Arsenopyrite Dissolved by Iron Solution

作　　者：衷水平[1,2] 吴智 黄中省 阮仁满[2] 伍赠玲 邹刚 

机构地区：[1]紫金矿业集团矿冶设计研究院低品位难处理黄金资源综合利用国家重点实验室,福建上杭364200 [2]中国科学院过程工程研究所,北京100190

出　　处：《稀有金属材料与工程》2013年第S2期467-471,共5页Rare Metal Materials and Engineering

基　　金：the National Basic Research Program of China(2010CB735501)

摘　　要：用自制反应器研究了毒砂的化学氧化溶解动力学过程。结果显示:在温度为30～75℃内,毒砂氧化的表观活化能为10.850kJ·mol-1,其反应受边界层扩散控制;在Fe3+浓度为4.62～10.04 g·L-1、27.32～36.33 g·L-1的条件下反应级数分别为0.34、0.61;溶液酸度与毒砂的溶解速率成反比。To extract the Au efficiently,the kinetic experiments were performed in a 1000 mL-glass bulbs which were made by us to determine the oxidative dissolution of arsenopyrite by iron solution.The results show that the rate of dissolution of arsenopyrite increases with the increasing of temperature from 30 ℃ to 75 ℃,in which an apparent activation energy for arsenopyrite oxidation is 10.850 kJ·mol-1.Moreover,the rate of oxidative dissolution of arsenopyrite increases with the increasing of concentration of ferric iron with the reaction order is 0.34(4.62～10.04 g·L-1) and 0.61(27.32～36.33 g·L-1).In contrast,the reduction of hydrogen ion can promote concentration promotes the leaching rate of arsenopyrite with the reaction order of –0.29.

关 键 词：难处理金矿 毒砂 氧化动力学 反应级数 活化能 

分 类 号：O643.1[理学—物理化学] TF831[理学—化学]