摘要
基于软锰矿烟气脱硫所得浆液中MnO2和Fe^2+共存特点,利用浆液中残留的MnO2氧化去除Fe^2+,考察了反应时间、温度、Fe^2+质量浓度和浆液pH对Fe^2+氧化率和残渣中锰质量分数的影响。结果表明:在反应时间1.5 h、温度85℃、浆液pH≤1.1、Fe^2+质量浓度≤3.86 g/L条件下,浆液中Fe^2+质量浓度可降至1 mg/L以下。该工艺同步实现Fe^2+的氧化和MnO2的还原浸出,无需外加氧化剂,有效降低了生产成本。
Oxidation removal of Fe^2+using MnO2 coexisting in pyrolusite desulfurization slurry was researched.The effects of reaction time,temperature,Fe^2+concentration and pH on oxidation removal of Fe^2+and content of Mn2+in pyrolusite slag were examined.The results show that under the conditions of reaction time of 1.5 h,reaction temperature of 380℃,Fe^2+concentration of below 3.86 g/L and pH of less than 1.1,the Fe^2+concentration is lower than 1 mg/L in the slurry.The process can realize Fe^2+oxidation and MnO2 reduction,save oxidant and reduce production cost.
作者
刘星
朱学成
高利
LIU Xing;ZHU Xuecheng;GAO Li(Guizhou Union Manganese Industry Co.,Ltd,Liupanshui 553600,China)
出处
《湿法冶金》
CAS
北大核心
2020年第4期356-359,共4页
Hydrometallurgy of China
基金
六盘水市科技支撑项目(52020-2018-01-02)。
关键词
FE^2+
二氧化锰
氧化
软锰矿
脱硫浆液
ferrous ions
manganese dioxide
oxidation
pyrolusite
desulfurization slurry
