Recovery of alumina and alkali in Bayer red mud by the formation of andradite-grossular hydrogarnet in hydrothermal process

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	Recovery of alumina and alkali in Bayer red mud by the formation of andradite-grossular hydrogarnet in hydrothermal process
	Zhang, Ran 1,2; Zheng, Shili 1; Ma, Shuhua 1; Zhang, Yi 1
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2011-05-30
卷号	189 期号:3 页码:827-835
关键词	Bayer red mud Andradite-grossular hydrogarnet Hydrothermal process Alumina Alkali
ISSN号	0304-3894
通讯作者	Ma, SH
英文摘要	Bayer 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.
WOS标题词	Science & Technology ; Technology ; Life Sciences & Biomedicine
类目[WOS]	Engineering, Environmental ; Engineering, Civil ; Environmental Sciences
研究领域[WOS]	Engineering ; Environmental Sciences & Ecology
关键词[WOS]	GARNETS ; TRANSFORMATION ; SPECTROSCOPY ; HEMATITE ; GOETHITE ; LIQUOR
收录类别	SCI
语种	英语
WOS记录号	WOS:000291912200027
公开日期	2013-11-05
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/4890]
专题	过程工程研究所_湿法冶金清洁生产技术国家工程实验室
作者单位	1.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
推荐引用方式 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.(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.