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Discovery of impurities existing state in carbide slag by chemical dissociation
Alternative TitleInt. J. Miner. Process.
Yang, Hang2; Cao, Jianwei1; Wang, Zhi1; Chen, Huahui2; Gong, Xuzhong1
2014-07-10
Source PublicationINTERNATIONAL JOURNAL OF MINERAL PROCESSING
ISSN0301-7516
Volume130Issue:JULPages:66-73
AbstractThe existing states of impurities in carbide slag were investigated which can be a good guide for impurity removal by physical methods. The calcium phase and the impurities wrap each other made it hard to research impurities. Therefore an acid chemical dissociation method was firstly proposed via plotting Eh-pH-diagram of the Ca(OH)(2), CaCO3, MgSiO3, Al2SiO5, Fe3O4 and H+ system. The optimum dissociation condition (pH = 4.0) was deduced from Eh-pH-diagram and verified by X-ray diffraction, X-ray fluorescence spectrum and morphology analysis. Morphological and elemental chemical analyses of the dissociated residues revealed the existence of Si in the form of SiO2. Fe and C existed as isolated particles of Fe3O4 and carbon respectively. Al and Mg were existed in the form of silicates such as Al2SiO5 and MgSiO3. Si, Al and Mg always appeared together in the carbide slag, providing a possibility for their integral removal. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).; The existing states of impurities in carbide slag were investigated which can be a good guide for impurity removal by physical methods. The calcium phase and the impurities wrap each other made it hard to research impurities. Therefore an acid chemical dissociation method was firstly proposed via plotting Eh-pH-diagram of the Ca(OH)(2), CaCO3, MgSiO3, Al2SiO5, Fe3O4 and H+ system. The optimum dissociation condition (pH = 4.0) was deduced from Eh-pH-diagram and verified by X-ray diffraction, X-ray fluorescence spectrum and morphology analysis. Morphological and elemental chemical analyses of the dissociated residues revealed the existence of Si in the form of SiO2. Fe and C existed as isolated particles of Fe3O4 and carbon respectively. Al and Mg were existed in the form of silicates such as Al2SiO5 and MgSiO3. Si, Al and Mg always appeared together in the carbide slag, providing a possibility for their integral removal. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
KeywordCarbide Slag Chemical Dissociation Thermodynamics Eh-ph Impurities Existing State
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.minpro.2014.05.003
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCALCIUM
WOS Research AreaEngineering ; Mineralogy ; Mining & Mineral Processing
WOS SubjectEngineering, Chemical ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000340311100009
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11583
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.China Univ Min & Technol Beijing, Sch Mech & Elect Engn, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Yang, Hang,Cao, Jianwei,Wang, Zhi,et al. Discovery of impurities existing state in carbide slag by chemical dissociation[J]. INTERNATIONAL JOURNAL OF MINERAL PROCESSING,2014,130(JUL):66-73.
APA Yang, Hang,Cao, Jianwei,Wang, Zhi,Chen, Huahui,&Gong, Xuzhong.(2014).Discovery of impurities existing state in carbide slag by chemical dissociation.INTERNATIONAL JOURNAL OF MINERAL PROCESSING,130(JUL),66-73.
MLA Yang, Hang,et al."Discovery of impurities existing state in carbide slag by chemical dissociation".INTERNATIONAL JOURNAL OF MINERAL PROCESSING 130.JUL(2014):66-73.
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