铁粉还原脱除电解锰阳极液中的硒

doi:10.11949/j.issn.0438-1157.20150873

化工学报 ›› 2015, Vol. 66 ›› Issue (9): 3698-3704.DOI: 10.11949/j.issn.0438-1157.20150873

铁粉还原脱除电解锰阳极液中的硒

王雨红, 吕艳, 农敬义, 蓝姿柳, 蒋佳鸾, 粟海锋

广西大学化学化工学院广西高校资源化工应用新技术重点实验室, 广西南宁 530004

收稿日期:2015-06-09 修回日期:2015-06-16 出版日期:2015-09-05 发布日期:2015-09-05
通讯作者: 粟海锋
基金资助:
广西研究生教育创新计划项目(YCBZ2014014);国家自然科学基金项目(51164002)。

Reductive removing selenium from electrolytic manganese anolytewith iron powder

WANG Yuhong, LÜ Yan, NONG Jingyi, LAN Ziliu, JIANG Jialuan, SU Haifeng

Guangxi Colleges and Universities Key Laboratory of New Technology and Application in Resource Chemical Engineering, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China

Received:2015-06-09 Revised:2015-06-16 Online:2015-09-05 Published:2015-09-05
Supported by:
supported by Innovation Project of Guangxi Graduate Education (YCBZ2014014) and the National Natural Science Foundation of China (51164002).

摘要/Abstract

摘要：

采用铁粉还原脱除电解锰阳极液中的硒,考察了各主要因素对硒脱除率的影响,研究了硒脱除过程的动力学。结果表明,锰阳极液中硒的脱除速率随反应时间、铁粉用量、反应温度的增加而增加,随硫酸用量的增加而减少。XRD与SEM分析表明,反应温度对硒渣结构影响最大,30℃反应后渣中存在Se、Fe、FeSe₂、Fe₂(SeO₄)₃4种物相,硒的结晶形态以纺锤形为主;90℃反应后渣中存在Se、FeSe₂两种形式,硒的结晶形态以球形为主。铁粉还原脱除锰阳极液中硒的动力学过程符合一级反应速率规律,属固体产物层扩散控制,表观活化能为15.94 kJ·mol^-1。

关键词: 铁粉, 电解锰阳极液, 还原, 硒, 分离, 反应动力学

Abstract:

The process of using iron powder to remove selenium from electrolytic manganese anolyte was investigated. The effects of variables such as stirring speed, iron powder dosage, sulfuric acid concentration and temperature were assessed. Experimental results indicated that the maximum remove rate of selenium to be 100% at a stirring speed of 600 r·min^-1, iron powder dosage of 400 mg·L^-1, sulfuric acid concentration of 50 g·L^-1 and temperature of 30℃. XRD and SEM analyses showed that temperature had a significant influnence on the structure of selenium residue. There had four phase Se, Fe, FeSe₂ and Fe₂(SeO₄)₃ existed in the slag after reaction at 30℃, and the crystallization morphology was spindle. The phase existed in the slag after reaction at 90℃ were Se and FeSe₂, and the morphology of crystals was sperical. The removing process was controlled by interface control. The apparent activation energy of removing selenium was determined to be 15.94 kJ·mol^-1.

Key words: iron powder, electrolytic manganese anolyte, reduction, selenium, separation, reaction kinetics

中图分类号:

王雨红, 吕艳, 农敬义, 蓝姿柳, 蒋佳鸾, 粟海锋. 铁粉还原脱除电解锰阳极液中的硒[J]. 化工学报, 2015, 66(9): 3698-3704.

WANG Yuhong, LÜ Yan, NONG Jingyi, LAN Ziliu, JIANG Jialuan, SU Haifeng. Reductive removing selenium from electrolytic manganese anolytewith iron powder[J]. CIESC Journal, 2015, 66(9): 3698-3704.

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铁粉还原脱除电解锰阳极液中的硒

Reductive removing selenium from electrolytic manganese anolytewith iron powder

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