简介概要

Reductive leaching of manganese from low-grade pyrolusite ore in sulfuric acid using pyrolysis-pretreated sawdust as a reductant

来源期刊:International Journal of Minerals Metallurgy and Materials2016年第3期

论文作者:Ya-li Feng Shi-yuan Zhang Hao-ran Li

文章页码:241 - 246

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°C. Other low-grade pyrolusite ores were tested, and the results showed that they responded well with manganese leaching efficiencies greater than 98%.

详情信息展示

Reductive leaching of manganese from low-grade pyrolusite ore in sulfuric acid using pyrolysis-pretreated sawdust as a reductant

Ya-li Feng1,Shi-yuan Zhang1,2,Hao-ran Li2

1. School of Civil and Environmental Engineering, University of Science and Technology Beijing2. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences

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°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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