Abstract: With FeSO4?7H2O as a reducing agent，manganese and zinc in ferromanganese smelting dust ash were leached in the form of Mn2+，Zn2+ by sulfuric acid. The optimal leaching condition was as follows：the concentration of H2SO4 was 20%，reaction time was 4 hours，reaction temperature was 90℃，liquid-solid ratio was 5∶1，dosage of FeSO4?7H2O was 75g，and stirring rate was 300 r/min. The highest leaching rate of manganese reached 96.76% and that of zinc was 84.88%.

Key words: ferromanganese smelting dust, sulfuric acid, manganese, zinc, leaching, reaction, solution, ferromanganese smelting dust, sulfuric acid, manganese, zinc, leaching

摘要： 以锰铁冶炼烟尘灰为原料，FeSO4?7H2O为还原剂，经硫酸浸出，使锰及锌元素以Mn2+、Zn2+形式进入溶液中，分离提取锰、锌元素。研究表明，浸出的最佳工艺条件为：H2SO4质量分数为20%，反应时间为4h，反应温度为90℃，液固比为5∶1，还原剂FeSO4?7H2O加入量为75g，搅拌速率为300r/min。锰浸出率可达96.76%，锌浸出率为84.88%。

关键词: 锰铁冶炼烟尘灰, 硫酸, 锰, 锌, 浸取, 反应, 溶液, 锰铁冶炼烟尘灰, 硫酸, 锰, 锌, 浸取