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Extraction of alumina and sodium oxide from red mud by a mild hydro-chemical process
Zhong, Li1,2,3; Zhang, Yifei1,2; Zhang, Yi1,2; Zhang, YF
2009-12-30
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume172Issue:2-3Pages:1629-1634
AbstractA mild hydro-chemical process to extract Al(2)O(3) in red mud to produce sodium aluminate hydrate was investigated, and the optimum conditions of Al(2)O(3) extraction were verified by experiments as leaching in 45% NaOH solution with CaO-to-red mud mass ratio of 0.25 and liquid-to-solid ratio of 0.9. under 0.8 MPa at 200 degrees C for 3.5 h. Subsequent process of extracting Na(2)O from the residue of Al(2)O(3) extraction was carried out in 7% NaOH solution with liquid-to-solid ratio of 3.8 under 0.9 MPa at 170 degrees C for 2 h. Overall, 87.8% of Al(2)O(3) and 96.4% of Na(2)O were extracted from red mud. The final residues with less than 1% Na(2)O could be utilized as feedstock in construction materials. The chemical reactions taking place in both Al(2)O(3) and Na(2)O extractions from red mud are proposed. (C) 2009 Elsevier B.V. All rights reserved.
KeywordRed Mud Alumina Sodium Oxide Mild Hydro-chemical Process
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
DOI10.1016/j.jhazmat.2009.08.036
Indexed BySCI
Language英语
WOS KeywordBAYER PROCESS ; ADSORPTION ; TAILINGS ; REMOVAL
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Engineering, Civil ; Environmental Sciences
WOS IDWOS:000271980800149
Citation statistics
Cited Times:67[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6526
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorZhang, YF
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Zhong, Li,Zhang, Yifei,Zhang, Yi,et al. Extraction of alumina and sodium oxide from red mud by a mild hydro-chemical process[J]. JOURNAL OF HAZARDOUS MATERIALS,2009,172(2-3):1629-1634.
APA Zhong, Li,Zhang, Yifei,Zhang, Yi,&Zhang, YF.(2009).Extraction of alumina and sodium oxide from red mud by a mild hydro-chemical process.JOURNAL OF HAZARDOUS MATERIALS,172(2-3),1629-1634.
MLA Zhong, Li,et al."Extraction of alumina and sodium oxide from red mud by a mild hydro-chemical process".JOURNAL OF HAZARDOUS MATERIALS 172.2-3(2009):1629-1634.
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