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Recovery of alumina and alkali in Bayer red mud by the formation of andradite-grossular hydrogarnet in hydrothermal process
Zhang, Ran1,2; Zheng, Shili1; Ma, Shuhua1; Zhang, Yi1; Ma, SH
2011-05-30
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume189Issue:3Pages:827-835
AbstractBayer red mud (RM) is an alumina refinery waste product rich in aluminum oxides and alkalis which are present primarily in the form of sodium hydro-aluminosilicate desilication product (DSP). A hydrothermal process was employed to recover alumina and alkali from "Fe-rich" and "Fe-lean" RM, the two representative species of RM produced in China. The hydrothermal process objective phase is andradite-grossular hydrogarnet characterized by the isomorphic substitution of Al and Fe. Batch experiments were used to evaluate the main factors influencing the recovery process, namely reaction temperature, caustic ratio (molar ratio of Na2O to Al2O3 in sodium solution), sodium concentration and residence time. The results revealed that the Na2O content of 0.5 wt% and A/S of 0.3 (mass ratio of Al2O3 to SiO2) in leached residue could be achieved with Fe-rich RM under optimal conditions. However, the hydrothermal treatment of Fe-lean RM proved less successful unless the reaction system was enriched with iron. Subsequent experiments examined the effects of the ferric compound's content and type on the substitution ratio. (C) 2011 Elsevier B.V. All rights reserved.
KeywordBayer Red Mud Andradite-grossular Hydrogarnet Hydrothermal Process Alumina Alkali
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
DOI10.1016/j.jhazmat.2011.03.004
Indexed BySCI
Language英语
WOS KeywordGARNETS ; TRANSFORMATION ; SPECTROSCOPY ; HEMATITE ; GOETHITE ; LIQUOR
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Engineering, Civil ; Environmental Sciences
WOS IDWOS:000291912200027
Citation statistics
Cited Times:80[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4890
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorMa, SH
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Ran,Zheng, Shili,Ma, Shuhua,et al. Recovery of alumina and alkali in Bayer red mud by the formation of andradite-grossular hydrogarnet in hydrothermal process[J]. JOURNAL OF HAZARDOUS MATERIALS,2011,189(3):827-835.
APA Zhang, Ran,Zheng, Shili,Ma, Shuhua,Zhang, Yi,&Ma, SH.(2011).Recovery of alumina and alkali in Bayer red mud by the formation of andradite-grossular hydrogarnet in hydrothermal process.JOURNAL OF HAZARDOUS MATERIALS,189(3),827-835.
MLA Zhang, Ran,et al."Recovery of alumina and alkali in Bayer red mud by the formation of andradite-grossular hydrogarnet in hydrothermal process".JOURNAL OF HAZARDOUS MATERIALS 189.3(2011):827-835.
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