FeS_2-MnO_2-H_2SO_4浸出软锰矿反应  

Pyrolusite Leaching Reactions in FeS_2-MnO_2-H_2SO_4 System

作　　者：冯雅丽[1] 张旭[1] 李浩然[2] 杨志超[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国科学院过程工程研究所生化工程国家重点实验室,北京100190

出　　处：《东北大学学报（自然科学版）》2014年第2期241-244,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(21176242;21176026);中央高校基本科研业务费专项资金资助项目(FRT-TP-09-002B);国家科技支撑计划项目(2012BAB14B05;2012AA062401);中国大洋矿产资源研究开发计划项目(DY125-15-T-08)

摘　　要：针对FeS2-MnO2-H2SO4浸出软锰矿的浸出过程进行了研究,考察了反应过程中FeS2反应方式对MnO2浸出的影响.研究过程中分别对矿浆中的Mn2+,Fe2+和Fe3+质量浓度,以及矿浆电位的变化进行了监测,并对浸出过程进行了阶段的划分与分析.通过对浸出过程中不同反应阶段的分析,发现不同反应阶段过程中Mn2+与Fe3+浸出速率的比值是不同的,说明在不同阶段存在着不同的反应方式,导致FeS2的利用率在不同阶段存在明显差异.同时,对矿浆电位的监测表明,高电位有利于FeS2浸出Fe2+,从而加快了MnO2的浸出速率.The process of pyrolusite leaching in FeS2-MnO2-H2SO4 system and the effect of FeS2 reaction pattern on leaching efficiency of MnO2 were experimentally studied. The concentrations of Mn2＋ ,Fe2＋ , Fe3＋ and pulp potential were monitored, and the process was divided into some phases and then analyzed. The results show that the leaching rate ratio of Mn2 ＋ to Fe3＋ is different in different phases, which shows that different reactions occurred in the pulp in different phases, leading to obvious difference in the utilization ratio of pyrite. The monitoring of pulp potential shows that high potential is favorable to the leaching of pyrite and also speeding up the leaching rate of MnO2.

关 键 词：软锰矿 黄铁矿 浸出率 浸出速率 反应过程 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]