| 摘要: |
| 研究了以低品位软锰矿为原料，用玉米秸秆和稻草为混合还原剂，在硫酸介质中还原浸出锰的效果.通过单因素实验确定了玉米秸秆和稻草-硫酸还原浸锰的适宜工艺条件，该适宜工艺条件如下：软锰矿粒径为109 μm，玉米秸秆和稻草的质量比为1∶1.5，玉米秸秆和稻草还原剂与软锰矿的质量比为3∶10，硫酸浓度为3.0 mol/L，液固比为10 mL/g，反应温度为90 ℃，反应时间为80 min.在适宜的浸出工艺条件下，软锰矿中锰的浸出率可达97%以上，锰的浸出效果较好. |
| 关键词: 软锰矿 玉米秸秆 稻草 硫酸 还原浸出 |
| DOI： |
| 分类号:TF111 |
| 基金项目:湖南省节能减排重大科技专项(S2008p6031) |
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| Reductive leaching of manganese from low-grade pyrolusiteby corn stlak and rice straw-sulfuric acid |
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Ding Yangeng1，Luo Daocheng21,2
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1.Xiangtan Electrochemical Scientific Ltd.，Xiangtan 411131，China;2.School of Chemistry and Chemical Engineering，Hunan University of Science and Technology，Xiangtan 411201，China
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| Abstract: |
| The reductive leaching effect of manganese was studied using low-grade pyrolusite as raw material，corn stlak and rice straw as compound reductive agent in sulfuric acid medium. The appropriate technical conditions of reducion leaching of manganese from low-grade pyrolusite with corn stlak and rice straw-sulfuric acid by single-factor test were confirmed. The appropriate technical conditions were as follows：pyrolusite particle size was 109 μm，the mass ratio of corn stlak to rice straw was 1∶1.5，the mass ratio of reductive agent of corn stlak and rice straw to pyrolusite was 3∶10，sulfuric acid concentration was 3.0mol/L，the liquid-to-solid ratio was 10 mL/g，reaction temperature was 90 ℃ and reaction time was 80 min. The leaching rate of manganese in pyrolusite reached above 97% under the appropriate leaching conditions，the leaching effect of manganese was better. |
| Key words: pyrolusite corn stlak rice straw sulfuric acid reductive leaching |
