CAS OpenIR  > 研究所(批量导入)
Dissolution Kinetics of Magnesium from Calcined Serpentine in NH4Cl Solution
Alternative TitleInd. Eng. Chem. Res.
Gao, Wencheng1,2; Wen, Jiankang2; Li, Zhibao1
2014-05-14
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume53Issue:19Pages:7947-7955
AbstractA process of extracting magnesium from serpentine to produce Mg compounds by using recyclable NH3 was proposed. This process includes calcination of serpentine; dissolution of magnesium by NH4Cl leaching to obtain NH3 and MgCl2-rich solution, and precipitation of Mg(OH)(2) from refined MgCl2-rich solution by feeding NH3. The effects of various factors, such as roasting temperature and time, particle size, concentration of NH4Cl solution, solid-to-liquid ratio, and leaching temperature, on the dissolution kinetics of magnesium of the calcined serpentine were comprehensively investigated. It is found that the extraction rate of magnesium was enhanced by the removal of NH3 generated from the reaction system. Thus, the obtained optimum conditions for magnesium extraction from serpentine are a roasting temperature of 700 degrees C, a roasting time of 1 h, a particle size fraction of -0.20 + 0.10 mm, an initial ammonium chloride concentration of 4.0 M, a solid-to-liquid ratio of 20/500 g/mL, and a reaction temperature of 104 degrees C. With the removal of NH3 in batch leaching study, the maximum recovery of magnesium reached 83.87%, and the concentration of magnesium was similar to 0.63 mol.L-1, satisfying the requirement of Mg(OH)(2) precipitation. Finally, the reaction kinetics of the system was successfully modeled by an empirical diffusion-like equation. The apparent activity energy was obtained to be 23.56 +/- 1.06 kJ.mol(-1). The results from this study provide the fundamentals for magnesium extraction from serpentine by NH4Cl leaching.; A process of extracting magnesium from serpentine to produce Mg compounds by using recyclable NH3 was proposed. This process includes calcination of serpentine; dissolution of magnesium by NH4Cl leaching to obtain NH3 and MgCl2-rich solution, and precipitation of Mg(OH)(2) from refined MgCl2-rich solution by feeding NH3. The effects of various factors, such as roasting temperature and time, particle size, concentration of NH4Cl solution, solid-to-liquid ratio, and leaching temperature, on the dissolution kinetics of magnesium of the calcined serpentine were comprehensively investigated. It is found that the extraction rate of magnesium was enhanced by the removal of NH3 generated from the reaction system. Thus, the obtained optimum conditions for magnesium extraction from serpentine are a roasting temperature of 700 degrees C, a roasting time of 1 h, a particle size fraction of -0.20 + 0.10 mm, an initial ammonium chloride concentration of 4.0 M, a solid-to-liquid ratio of 20/500 g/mL, and a reaction temperature of 104 degrees C. With the removal of NH3 in batch leaching study, the maximum recovery of magnesium reached 83.87%, and the concentration of magnesium was similar to 0.63 mol.L-1, satisfying the requirement of Mg(OH)(2) precipitation. Finally, the reaction kinetics of the system was successfully modeled by an empirical diffusion-like equation. The apparent activity energy was obtained to be 23.56 +/- 1.06 kJ.mol(-1). The results from this study provide the fundamentals for magnesium extraction from serpentine by NH4Cl leaching.
KeywordWaste Serpentine Acid Digestion Carbonation Minerals Behavior Sequestration Silicon
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie4043533
URL查看原文
Indexed BySCI
Language英语
WOS KeywordWASTE SERPENTINE ; ACID DIGESTION ; CARBONATION ; MINERALS ; BEHAVIOR ; SEQUESTRATION ; SILICON
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000336078500015
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10905
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Gen Res Inst Nonferrous Met, Natl Engn Lab Biohydromet, Beijing 100088, Peoples R China
Recommended Citation
GB/T 7714
Gao, Wencheng,Wen, Jiankang,Li, Zhibao. Dissolution Kinetics of Magnesium from Calcined Serpentine in NH4Cl Solution[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(19):7947-7955.
APA Gao, Wencheng,Wen, Jiankang,&Li, Zhibao.(2014).Dissolution Kinetics of Magnesium from Calcined Serpentine in NH4Cl Solution.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(19),7947-7955.
MLA Gao, Wencheng,et al."Dissolution Kinetics of Magnesium from Calcined Serpentine in NH4Cl Solution".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.19(2014):7947-7955.
Files in This Item:
File Name/Size DocType Version Access License
Dissolution Kinetics(5122KB) 限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Gao, Wencheng]'s Articles
[Wen, Jiankang]'s Articles
[Li, Zhibao]'s Articles
Baidu academic
Similar articles in Baidu academic
[Gao, Wencheng]'s Articles
[Wen, Jiankang]'s Articles
[Li, Zhibao]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Gao, Wencheng]'s Articles
[Wen, Jiankang]'s Articles
[Li, Zhibao]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.