Treatment of tionite residue from titanium oxide industry for recovery of TiO2 and removal of silica

CORC > 过程工程研究所 > 中国科学院过程工程研究所 > 湿法冶金清洁生产技术国家工程实验室

	Treatment of tionite residue from titanium oxide industry for recovery of TiO2 and removal of silica
	Meng, Fancheng1,2,3 ; Xue, Tianyan 1,2; Liu, Yahui 1,2; Wang, Weijing 1,2; Qi, Tao 1,2
刊名	HYDROMETALLURGY
	2016-05-01
卷号	161 期号:MAY 页码:112-116
关键词	Tionite Titanium recovery Silicon removal Hydrothermal conversion Water washing Acid leaching
ISSN号	0304-386X
英文摘要	Solid waste tionite generated in the sulfate process for TiO2 production is a secondary titanium resource with high silicon content. To recover titanium and remove silicon from the tionite, a process involving hydrothermal conversion, water washing, and acid leaching was proposed. To avoid Na2O loss, the formation of Na2TiSiO5 by-product was prevented by adding CaO. XRD, ICP-OES and FT-IR were used to examine the transformation of the titanium and silicon. The optimum hydrothermal conditions are NaOH/tionite mass ratio of 4:1 and Ca/Si molar ratio of 1:1 in 45% NaOH solution at 240 degrees C for 1 h. Under these conditions, the titanium conversion was 97.3% with Na2TiO3 as the main titanium phase, while most silicon was converted to Ca(2)Sia(4), and katoite, and NaCaHSiO4, instead of Na2TiSiO5. About 97.5% of the Na2O was recovered after washing the hydrothermal products with water, and 93.1% of the silicon retained in the washed solution was removed by adding CaO. After leaching the washed products with 40% H2SO4 solution at 60 degrees C, about 97% of the titanium was easily recovered, forming the titanyl sulfate solution that was employed for TiO2 production. The Ca and Si components formed CaSO4 and silica gel, which were then separated from the acid leaching solution. (C) 2015 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Metallurgy & Metallurgical Engineering
研究领域[WOS]	Metallurgy & Metallurgical Engineering
关键词[WOS]	SODIUM ALUMINATE SOLUTIONS ; HYDROXIDE SOLUTION ; FLY-ASH ; RED MUD ; TRANSFORMATION ; EXTRACTION ; NACAHSIO4 ; TITANATE ; WASTE ; SLAG
收录类别	SCI
语种	英语
WOS记录号	WOS:000373542100015
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/20989]
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, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Meng, Fancheng,Xue, Tianyan,Liu, Yahui,et al. Treatment of tionite residue from titanium oxide industry for recovery of TiO2 and removal of silica[J]. HYDROMETALLURGY,2016,161(MAY):112-116.
APA	Meng, Fancheng,Xue, Tianyan,Liu, Yahui,Wang, Weijing,&Qi, Tao.(2016).Treatment of tionite residue from titanium oxide industry for recovery of TiO2 and removal of silica.HYDROMETALLURGY,161(MAY),112-116.
MLA	Meng, Fancheng,et al."Treatment of tionite residue from titanium oxide industry for recovery of TiO2 and removal of silica".HYDROMETALLURGY 161.MAY(2016):112-116.