Reductive leaching of low-grade manganese ore with pre-processed cornstalk  

作　　者：Ai-fei Yi Meng-ni Wu Peng-wei Liu Ya-li Feng Hao-ran Li 

机构地区：[1]School of Civil and Environment Engineering, University of Science and Technology Beijing [2]State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education) [3]State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences

出　　处：《International Journal of Minerals,Metallurgy and Materials》2015年第12期1245-1251,共7页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Water Pollution Control and Treatment Science and Technology Major Project (No. 2015ZX07205-003);the China Ocean Mineral Resource R&D Association (No. DY125-15-T-08);the National Natural Science Foundation of China (Nos. 21176242 and 21176026)

摘　　要：Cornstalk is usually directly used as a reductant in reduetive leaching manganese. However, low utilization of cornstalk makes low manganese dissolution ratio, In the research, pretreatment for cornstalk was proposed to improve manganese dissolution ratio. Cornstalk was preprocessed by a heated sulfuric acid solution （1.2 M of sulfuric acid concentration） for 10 min at 80℃. Thereafter, both the pretreated solution and the residue were used as a reductant for manganese leaching. This method not only exhibited superior activity for hydrolyzing cornstalk but also enhanced manganese dissolution. These effects were attributed to an increase in the amount of reductive sugars resulting from lignin hydrolysis. Through acid pretreatment for cornstalk, the manganese dissolution ratio was improved from 50.14% to 83.46%. The present work demonstrates for the first time the effective acid pretreatment of cornstalk to provide a cost-effective reductant for manganese leaching.Cornstalk is usually directly used as a reductant in reduetive leaching manganese. However, low utilization of cornstalk makes low manganese dissolution ratio, In the research, pretreatment for cornstalk was proposed to improve manganese dissolution ratio. Cornstalk was preprocessed by a heated sulfuric acid solution （1.2 M of sulfuric acid concentration） for 10 min at 80℃. Thereafter, both the pretreated solution and the residue were used as a reductant for manganese leaching. This method not only exhibited superior activity for hydrolyzing cornstalk but also enhanced manganese dissolution. These effects were attributed to an increase in the amount of reductive sugars resulting from lignin hydrolysis. Through acid pretreatment for cornstalk, the manganese dissolution ratio was improved from 50.14% to 83.46%. The present work demonstrates for the first time the effective acid pretreatment of cornstalk to provide a cost-effective reductant for manganese leaching.

关 键 词：manganese ore treatment cornstalk reductants LEACHING 

分 类 号：TF792[冶金工程—钢铁冶金]