Recovery of titanium from undissolved residue (tionite) in titanium oxide industry via NaOH hydrothermal conversion and H2SO4 leaching

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

	Recovery of titanium from undissolved residue (tionite) in titanium oxide industry via NaOH hydrothermal conversion and H2SO4 leaching
	Meng, Fan-cheng1,2,3 ; Xue, Tian-yan 1,2; Liu, Ya-hui 1,2; Zhang, Guo-zhi 1,2,3; Qi, Tao 1,2
刊名	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
	2016-06-01
卷号	26 期号:6 页码:1696-1705
关键词	tionite titanium recovery NaOH hydrothermal conversion water washing H2SO4 leaching
ISSN号	1003-6326
英文摘要	To recover titanium from tionite, a new process consisting of NaOH hydrothermal conversion, water washing, and H2SO4 leaching for TiO2 preparation was developed. The experimental results show that under the optimum hydrothermal conversion conditions, i.e., 50% NaOH (mass fraction) solution, NaOH/tionite mass ratio of 4: 1, reaction temperature of 240 degrees C, reaction time of 1 h and oxygen partial pressure of 0.25 MPa, the titanium was mainly converted into Na2TiO3, and the conversion was 97.2%. The unwanted product Na2TiSiO5 remained stable in water washing, and its formation was prevented by improving NaOH concentration. In water washing process, about 97.6% of Na+ could be recycled by washing the hydrothermal product. The NaOH solutions could be reused after concentration. 96.7% of titanium in the washed product was easily leached in H2SO4 solution at low temperatures, forming titanyl sulfate solution to further prepare TiO2.
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]	SULFURIC-ACID ; DIOXIDE ; TIO2 ; SLAG ; PIGMENT ; TRANSFORMATION ; CHROMITE ; KINETICS ; SYSTEM ; WASTES
收录类别	SCI
语种	英语
WOS记录号	WOS:000379548800027
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/21245]
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 100049, Peoples R China
推荐引用方式 GB/T 7714	Meng, Fan-cheng,Xue, Tian-yan,Liu, Ya-hui,et al. Recovery of titanium from undissolved residue (tionite) in titanium oxide industry via NaOH hydrothermal conversion and H2SO4 leaching[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2016,26(6):1696-1705.
APA	Meng, Fan-cheng,Xue, Tian-yan,Liu, Ya-hui,Zhang, Guo-zhi,&Qi, Tao.(2016).Recovery of titanium from undissolved residue (tionite) in titanium oxide industry via NaOH hydrothermal conversion and H2SO4 leaching.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,26(6),1696-1705.
MLA	Meng, Fan-cheng,et al."Recovery of titanium from undissolved residue (tionite) in titanium oxide industry via NaOH hydrothermal conversion and H2SO4 leaching".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 26.6(2016):1696-1705.