| Reductive leaching of manganese from low-grade pyrolusite ore in sulfuric acid using pyrolysis-pretreated sawdust as a reductant |
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| 作者姓名： | Ya-li Feng Shi-yuan Zhang Hao-ran Li |
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| 作者单位： | School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China |
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| 基金项目： | This research was financially supported by the China Ocean Mineral Resource Research and Development Association(DY125-15-T-08)，the National Key Technology Research and Development Program of China(2012BAB07B05)，the National High Technology Research and Development Program of China(2012AA062401)，the National Natural Science Foundation of China(.21176242 and 21176026) |
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| 摘 要： | Manganese (Mn) leaching and recovery from low-grade pyrolusite ore were studied using sulfuric acid (H2SO4) as a leachant and pyrolysis-pretreated sawdust as a reductant. The effects of the dosage of pyrolysis-pretreated sawdust to pyrolusite ore, the concentration of sulfuric acid, the liquid/solid ratio, the leaching temperature, and the leaching time on manganese and iron leaching efficiencies were investigated. Analysis of manganese and iron leaching efficiencies revealed that a high manganese leaching efficiency was achieved with low iron extraction. The optimal leaching efficiency was determined to be 20wt% pyrolysis-pretreated sawdust and 3.0 mol/L H2SO4 using a liquid/ solid ratio of 6.0 mL/g for 90 min at 90℃. Other low-grade pyrolusite ores were tested, and the results showed that they responded well with manganese leaching efficiencies greater than 98%.
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| 关 键 词： | manganese ore treatment pyrolusite sawdust pyrolysis leaching manganese |
Reductive leaching of manganese from low-grade pyrolusite ore in sulfuric acid using pyrolysis-pretreated sawdust as a reductant |
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| Ya-li Feng,Shi-yuan Zhang,Hao-ran Li.Reductive leaching of manganese from low-grade pyrolusite ore in sulfuric acid using pyrolysis-pretreated sawdust as a reductant[J].International Journal of Minerals,Metallurgy and Materials,2016,23(3):241-246. |
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| Authors: | Ya-li Feng Shi-yuan Zhang Hao-ran Li |
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| Affiliation: | 1. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;3. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Manganese (Mn) leaching and recovery from low-grade pyrolusite ore were studied using sulfuric acid (H2SO4) as a leachant and pyrolysis-pretreated sawdust as a reductant. The effects of the dosage of pyrolysis-pretreated sawdust to pyrolusite ore, the concentration of sulfuric acid, the liquid/solid ratio, the leaching temperature, and the leaching time on manganese and iron leaching efficiencies were investigated. Analysis of manganese and iron leaching efficiencies revealed that a high manganese leaching efficiency was achieved with low iron extraction. The optimal leaching efficiency was determined to be 20wt% pyrolysis-pretreated sawdust and 3.0 mol/L H2SO4 using a liquid/ solid ratio of 6.0 mL/g for 90 min at 90°C. Other low-grade pyrolusite ores were tested, and the results showed that they responded well with manganese leaching efficiencies greater than 98%. |
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| Keywords: | manganese ore treatment pyrolusite sawdust pyrolysis leaching manganese |
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