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化工学报  2015 

铁粉还原脱除电解锰阳极液中的硒

DOI: 10.11949/j.issn.0438-1157.20150873, PP. 3698-3704

Keywords: 铁粉,电解锰阳极液,还原,,分离,反应动力学

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Abstract:

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15.94kJ·mol-1。

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