Journal of Northeastern University(Natural Science)

Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (8): 1184-1188.DOI: 10.12068/j.issn.1005-3026.2015.08.026

• Resources & Civil Engineering • Previous Articles     Next Articles

Reductive Leaching of High Iron Low-Grade Manganese Ore with Pre-processed Cornstalk

FENG Ya-li1， YI Ai-fei1， LI Hao-ran2， WANG Wei-da1   

  1. 1.School of Civil and Environmental Engineering， University of Science and Technology Beijing， Beijing 100083， China; 2.National Key Laboratory of Biochemical Engineering， Institute of Process Engineering， Chinese Academy of Sciences， Beijing 100190， China.
  • Received:2014-03-28 Revised:2014-03-28 Online:2015-08-15 Published:2015-08-28
  • Contact: FENG Ya-li
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Abstract: Utilizing cornstalk pre-processing with sulfuric acid， leaching experiments were carried out to dispose of manganese ore containing Mn of 9.63%. The effects of pre-process time， cornstalk dosage， pre-process temperature， concentration of sulfuric acid and leaching temperature on manganese dissolution were investigated. The results showed that in the condition of pre-process cornstalk with dilute acid at 80oC， 2.5g of cornstalk and concentration of H2SO4 1.2mol/L for 10minutes， leaching manganese using pre-processed cornstalk as a reductant for 90 minutes at 90℃ could dissolve 92% of the manganese， and less than 20% Fe was dissolved. The FTIR analysis results indicated that cornstalk pre-processed with acid could destroy the structure of lignin， which is beneficial to leaching.

Key words: cornstalk, low-grade manganese ore with high-content iron, pre-processing with sulfuric acid, reductive organics, jarosite

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