Preparation of sodium manganate from low-grade pyrolusite by alkaline predesilication-fluidized roasting technique | |
Deng, Xiang-yi1; Feng, Ya-li1; Li, Hao-ran2; Du, Zhu-wei2; Kang, Jin-xing1; Guo, Cheng-lin1 | |
刊名 | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA |
2018-05-01 | |
卷号 | 28期号:5页码:1045-1052 |
关键词 | Low-grade Pyrolusite Desilication Fluidized Roasting Sodium Manganate |
ISSN号 | 1003-6326 |
DOI | 10.1016/S1003-6326(18)64742-9 |
英文摘要 | Low concentration alkaline leaching was used for predesilication treatment of low-grade pyrolusite. The effects of initial NaOH concentration, liquid-to-solid ratio, leaching temperature, leaching time and stirring speed on silica leaching rate were investigated and the kinetics of alkaline leaching process was studied. The results show that silica leaching rate reached 91. 2% under the conditions of initial NaOH concentration of 20%, liquid-to-solid ratio of 4:1, leaching temperature of 180 C-degrees, leaching time of 4 h and stirring speed of 300 r/min. Shrinking-core model showed that the leaching process was controlled by the chemical surface reaction with activation energy E-a of 53.31 kJ/mol. The fluidized roasting conditions for preparation of sodium manganate were optimized by the orthogonal experiments using the desiliconized residue. The conversion rate of sodium manganate was obtained to be 89.7% under the conditions of silica leaching rate of 91.2%, NaOH/MnO2 mass ratio of 3:1, roasting temperature of 500 C-degrees and roasting time of 4 h, and it increased with the increase of silicon leaching rate. |
资助项目 | Major Science and Technology Program for Water Pollution Control and Treatment, China[2015ZX07205-003] ; China Ocean Mineral Resources Research & Development Program[DY125-15-T-08] ; National Natural Science Foundation of China[21176026] ; National Natural Science Foundation of China[21176242] |
WOS关键词 | Hydroxide Solution ; Sulfuric-acid ; Vanadium ; Recovery ; Slag ; Ore ; Reductant ; Oxide |
WOS研究方向 | Metallurgy & Metallurgical Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000434388300025 |
资助机构 | Major Science and Technology Program for Water Pollution Control and Treatment, China ; China Ocean Mineral Resources Research & Development Program ; National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/24841] |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Feng, Ya-li |
作者单位 | 1.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100090, Peoples R China |
推荐引用方式 GB/T 7714 | Deng, Xiang-yi,Feng, Ya-li,Li, Hao-ran,et al. Preparation of sodium manganate from low-grade pyrolusite by alkaline predesilication-fluidized roasting technique[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2018,28(5):1045-1052. |
APA | Deng, Xiang-yi,Feng, Ya-li,Li, Hao-ran,Du, Zhu-wei,Kang, Jin-xing,&Guo, Cheng-lin.(2018).Preparation of sodium manganate from low-grade pyrolusite by alkaline predesilication-fluidized roasting technique.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,28(5),1045-1052. |
MLA | Deng, Xiang-yi,et al."Preparation of sodium manganate from low-grade pyrolusite by alkaline predesilication-fluidized roasting technique".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 28.5(2018):1045-1052. |
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