Bita Nadirian-Miandoab - M.Sc. student in Extractive Metallurgy Eng., Sahand University of Technology, Tabriz, Iran
Mehdi Ojaghi-Ilkhchi - Assistant Professor, Faculty of Materials Eng., Sahand University of Technology, Tabriz, Iran

Extraction of manganese from manganese dioxide concentrate was investigated using cornstalk as areducing agent in dilute sulfuric acid medium. The effects of cornstalk presence, leaching time and solidto liquid ratio on the leaching percent of Mn were investigated. The leaching percent about 100 for Mnwas obtained under the following optimized conditions: cornstalk to manganese oxide concentrate massratio of 1:2, solid to liquid ratio of 100 g/L, leaching temperature of 85 °C, sulfuric acid concentrationof 2M and leaching time of 3 hr.

Manganese; Pyrolusite; Reductive Leaching; Cornstalk