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-yan1,2; Liu, Ya-hui1,2; Zhang, Guo-zhi1,2,3; Qi, Tao1,2
2016-06-01
发表期刊TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
卷号26期号:6页码:1696-1705
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.
关键词Tionite Titanium Recovery Naoh Hydrothermal Conversion Water Washing H2so4 Leaching
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/S1003-6326(16)64247-4
收录类别SCI
语种英语
关键词[WOS]SULFURIC-ACID ; DIOXIDE ; TIO2 ; SLAG ; PIGMENT ; TRANSFORMATION ; CHROMITE ; KINETICS ; SYSTEM ; WASTES
WOS研究方向Metallurgy & Metallurgical Engineering
WOS类目Metallurgy & Metallurgical Engineering
项目资助者National Natural Science Foundation of China(51090380) ; National Basic Research Program of China(2013CB632604 ; National Science Foundation for Distinguished Young Scholars of China(51125018) ; Key Research Program of the Chinese Academy of Sciences(KGZD-EW-201-2) ; Natural Science Foundation for the Youth, China(51374191 ; 2013CB632601) ; 51402303)
WOS记录号WOS:000379548800027
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21245
专题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
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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.
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