Ultrasonic-assisted Leaching of Manganese from Rhodochrosite
Received:October 29, 2021  Revised:November 02, 2021
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DOI:doi:10.3969/j.issn.1007-7545.2022.02.002
KeyWord:manganese; ultrasonic; leaching; CaSO4•2H2O; mass transfer
                    
AuthorInstitution
ZENG Xiang-fei 西南科技大学固体废物处理与资源化教育部重点实验室
SHU Jian-cheng 西南科技大学固体废物处理与资源化教育部重点实验室
WANG Ji-qin 西南科技大学固体废物处理与资源化教育部重点实验室
CAO Wen-xin 西南科技大学固体废物处理与资源化教育部重点实验室
ZHANG Yu-gai 郑州清源智能装备科技有限公司
CHEN Meng-jun 西南科技大学固体废物处理与资源化教育部重点实验室
ZHANG Qing-dong 西南科技大学固体废物处理与资源化教育部重点实验室
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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 60 W, L/S of 5 L/g, mass ratio acid to ore of 0.58, temperature of 50 ℃, and time of 2.5 h, which is about 7 percent 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.
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