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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
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume26Issue:6Pages:1696-1705
AbstractTo 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.
KeywordTionite Titanium Recovery Naoh Hydrothermal Conversion Water Washing H2so4 Leaching
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/S1003-6326(16)64247-4
Indexed BySCI
Language英语
WOS KeywordSULFURIC-ACID ; DIOXIDE ; TIO2 ; SLAG ; PIGMENT ; TRANSFORMATION ; CHROMITE ; KINETICS ; SYSTEM ; WASTES
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationNational 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 IDWOS:000379548800027
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21245
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.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
Recommended Citation
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.
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