CAS OpenIR  > 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, Tianyan1,2; Liu, Yahui1,2; Wang, Weijing1,2; Qi, Tao1,2
2016-05-01
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume161Issue:MAYPages:112-116
AbstractSolid 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.
KeywordTionite Titanium Recovery Silicon Removal Hydrothermal Conversion Water Washing Acid Leaching
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.hydromet.2016.02.001
Indexed BySCI
Language英语
WOS KeywordSODIUM ALUMINATE SOLUTIONS ; HYDROXIDE SOLUTION ; FLY-ASH ; RED MUD ; TRANSFORMATION ; EXTRACTION ; NACAHSIO4 ; TITANATE ; WASTE ; SLAG
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationNational Basic Research Program of China (973 Program)(2013CB632604) ; National Science Foundation for Distinguished Young Scholars of China(51125018) ; Chinese Academy of Sciences(KGZD-EW-201-2) ; National Natural Science Foundation of China(51374191 ; 51402303)
WOS IDWOS:000373542100015
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/20989
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 100039, Peoples R China
Recommended Citation
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.
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