An environmentally friendly design for low-grade diasporic-bauxite processing

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	An environmentally friendly design for low-grade diasporic-bauxite processing
	Ma, Shu-hua 1; Wen, Zong-guo 1; Chen, Ji-ning 1; Zheng, Shi-li 2
刊名	MINERALS ENGINEERING
	2009-08-01
卷号	22 期号:9-10 页码:793-798
关键词	Non-ferrous metallic ores Digestion Environmental Mineral economics
ISSN号	0892-6875
通讯作者	Ma, SH
英文摘要	A new environmentally friendly design for low-grade diasporic-bauxite processing which is different from the Bayer and sintering processes was proposed in this paper. In the redesign of alumina production technology, a mixture of bauxite ore and sodium hydroxide solution was heated at a higher temperature for the purpose of complete decomposition of bauxite. The products were then extracted by water; the resulting sodium aluminate solution was further purified and used for the gibbsite precipitation, the residue being reacted with a caustic liquor to recover sodium oxide and alumina. The experimental results show that during the new process bauxite decomposition rates approach 100% and the residues can be easily recovered. When diasporic ores with mass ratio of alumina to silica of approximately 5:1 are treated, total alumina recovery efficiency of 86% and a sodium oxide presence below 1.5% in the final red mud will be achieved. This new design surpasses previous approaches in terms of high resource efficiency and low environmental impact. (C) 2009 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Engineering, Chemical ; Mineralogy ; Mining & Mineral Processing
研究领域[WOS]	Engineering ; Mineralogy ; Mining & Mineral Processing
关键词[WOS]	REVERSE FLOTATION ; ECO-EFFICIENCY ; REMOVAL ; IRON
收录类别	SCI
语种	英语
WOS记录号	WOS:000268423500008
公开日期	2013-12-06
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/6623]
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.Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Ma, Shu-hua,Wen, Zong-guo,Chen, Ji-ning,et al. An environmentally friendly design for low-grade diasporic-bauxite processing[J]. MINERALS ENGINEERING,2009,22(9-10):793-798.
APA	Ma, Shu-hua,Wen, Zong-guo,Chen, Ji-ning,&Zheng, Shi-li.(2009).An environmentally friendly design for low-grade diasporic-bauxite processing.MINERALS ENGINEERING,22(9-10),793-798.
MLA	Ma, Shu-hua,et al."An environmentally friendly design for low-grade diasporic-bauxite processing".MINERALS ENGINEERING 22.9-10(2009):793-798.