Preparation of chemical manganese dioxide from low-grade rhodochrosite ore

作     者：ZHAO Jing XU Longjun XIE Chao 

作者机构：State Key Laboratory of Coal Mine Disaster Dynamics and ControlChongqing University School of Environmental Protection and Safety EngineeringUniversity of South China 

出 版 物：《Chinese Journal Of Geochemistry》 (中国地球化学学报)

年 卷 期：2013年第32卷第4期

页      面：380-384页

核心收录：

学科分类：081702[工学-化学工艺] 081902[工学-矿物加工工程] 0819[工学-矿业工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Foundation by the Bureau of Land Resources and Housing Management of Chongqing(Scientific & Technologic Program in 2011) 

主　　题：化学二氧化锰 菱锰矿 低品位 制备 X-射线衍射 H2SO4 锰回收率 MnO2 

摘      要：The preparation of chemical manganese dioxide(CMD) from low-grade rhodochrosite ore(LGRO) in Xiushan,Chongqing,was studied and improved,including leaching with sulfuric acid,purifying,crystallizing and decomposing of MnCO3,and refining of primary *** product was characterized by X-ray *** results showed that the extraction ratio,the manganese recovery ratio of purifying,crystallization and refining reached 96.8%,93.9%,97.7%and 85.4%,*** optimum conditions of refining were described as follows:liquid(H2SO4)/solid(primary MnO2) ratio was 3 L/g,the concentrations of NaClO exceeded 20%,and reaction time was 3 *** the above conditions,the contents of MnO2and Mn in the obtained manganese dioxide were respectively 85.1%and 53.9%.The refined MnO2can be used as the super grade manganese dioxide mine powder in chemical *** XRD indicated that the structure of the product wasγ-MnO2.