Preparation of manganese sulfate from low-grade manganese carbonate ores by sulfuric acid leaching

查看全文 作　　者：Qing-quan [1]Lin;Guo-hua [1]Gu;Hui [2]Wang;Ren-feng [1]Zhu;You-cai [2]Liu;Jian-gang [2]Fu

机构地区：[1]School of Minerals Processing and Bioengineering, Central South University;[2]School of Chemistry and Chemical Engineering, Central South University

出　　处：《International Journal of Minerals,Metallurgy and Materials》索引2016年第23卷第5期,共10页

基　　金：supported by the National Natural Science Foundation of China (51374249) 摘　　要：In this study, a method for preparing pure manganese sulfate from low-grade ores with a granule mean size of 0.47 mm by direct acid leaching was developed. The effects of the types of leaching agents, sulfuric acid concentration, reaction temperature, and agitation rate on the leaching efficiency of manganese were investigated. We observed that sulfuric acid used as a leaching agent provides a similar leaching efficiency of manganese and superior selectivity against calcium compared to hydrochloric acid. The optimal leaching conditions in sulfuric acid media were determined; under the optimal conditions, the leaching efficiencies of Mn and Ca were 92.42% and 9.61%, respectively. Moreover, the kinetics of manganese leaching indicated that the leaching follows the diffusion-controlled model with an apparent activation energy of 12.28 k J·mol^(-1). The purification conditions of the leaching solution were also discussed. The results show that manganese dioxide is a suitable oxidant of ferrous ions and sodium dimethyldithiocarbamate is an effective precipitant of heavy metals. Finally, through chemical analysis and X-ray diffraction analysis, the obtained product was determined to contain 98% of MnSO_4·H_2O. 关键词：硫酸浸出低品位矿石硫酸锰碳酸锰矿石制备 X射线衍射分析二硫代氨基平均粒径

相关文献

参考文献（36）
引证文献（6）
耦合文献（71）

参考文献(36)

引证文献(6)

耦合文献(71)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Preparation of manganese sulfate from low-grade manganese carbonate ores by sulfuric acid leaching

参考文献(36)

引证文献(6)

耦合文献(71)

用户提示