有色金属 冶炼部分 年第 期
·8· ( )(reatment and Resource Recycle(SWUST),Ministry of Education,
Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;
2.Zhengzhou Qingyuan Intelligent Equipment Technology Co.,Ltd.,Zhengzhou 450001,China)
Abstract:A comparative study of conventional leaching and ultrasonic-assisted leaching of manganese from
rhodochroite was conducted applying rhodochrosite as raw materials.Effects of ultrasonic power,L/S,
mass ratio of acid to ore,temperature,and time on Mn leaching efficiency were discussed.The results
show that leaching efficiency of Mn is up to 94.09% under the optimum conditions including ultrasonic
power of 60W,L/S of 5L/g,mass ratio acid to ore of 0.58,temperature of 50℃,and time of 2.5h,
which is about 7percent points higher than that of conventional leaching under the same conditions.The
passivation layer of CaSO4·2H2O is refined by ultrasonic during leaching,and solid-liquid mass transfer
resistance is reduced.Moreover,the mineral inclusion is opened and formation of new reaction interface is
promoted,so the leaching efficiency of Mn is improved.These results provide a new way for Mn leaching
from rhodochroite.
Key words:manganese;ultrasonic;leaching;CaSO4·2H2O;mass transfer
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