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Production of Rutile TiO2 Pigment from Titanium Slag Obtained by Hydrochloric Acid Leaching of Vanadium-Bearing Titanomagnetite
Alternative TitleInd. Eng. Chem. Res.
Zhao, Longsheng1,2,3; Liu, Yahui2,3; Wang, Lina2,3; Zhao, Hongxin2,3; Chen, Desheng2,3; Zhong, Binnian2,3; Wang, Jianchong2,3; Qi, Tao2,3
2014-01-08
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume53Issue:1Pages:70-77
AbstractAn alternative route was proposed for preparing rutile titanium dioxide (TiO2) white pigment. The process involves the digestion of titanium slag with sulfuric acid, subsequent hydrolysis of unenriched titanyl sulfate solution with ammonia, low-temperature calcination, and unseeded crystallization, producing a high-quality rutile TiO2 white pigment. The experimental data indicated that the conversion ratio of dissolved Ti in the unenriched titanyl sulfate solution was highly dependent on the NH3/TiO2 molar ratio. Under the optimal conditions, approximately 92.0% of dissolved Ti in the solution could be converted to metatitanic acid (H2TiO3) that was then calcined at 850 degrees C to form rutile TiO2 pigment with purity of 98.41% and mean particle diameter of 0.1-0.3 mu m. The presence of NH4+ during the hydrolysis improved the stability of the charged H2TiO3 particles and blocked further coagulation. The fast phase transformation at relatively low temperature could be attributed to the presence of self-generated rutile nuclei. In addition, the experimental validation for the unseeded precipitation of ferrous ammonia sulfate ((NH4)(2)Fe(SO4)(2)center dot 6H(2)O) in the crystallization step was demonstrated.; An alternative route was proposed for preparing rutile titanium dioxide (TiO2) white pigment. The process involves the digestion of titanium slag with sulfuric acid, subsequent hydrolysis of unenriched titanyl sulfate solution with ammonia, low-temperature calcination, and unseeded crystallization, producing a high-quality rutile TiO2 white pigment. The experimental data indicated that the conversion ratio of dissolved Ti in the unenriched titanyl sulfate solution was highly dependent on the NH3/TiO2 molar ratio. Under the optimal conditions, approximately 92.0% of dissolved Ti in the solution could be converted to metatitanic acid (H2TiO3) that was then calcined at 850 degrees C to form rutile TiO2 pigment with purity of 98.41% and mean particle diameter of 0.1-0.3 mu m. The presence of NH4+ during the hydrolysis improved the stability of the charged H2TiO3 particles and blocked further coagulation. The fast phase transformation at relatively low temperature could be attributed to the presence of self-generated rutile nuclei. In addition, the experimental validation for the unseeded precipitation of ferrous ammonia sulfate ((NH4)(2)Fe(SO4)(2)center dot 6H(2)O) in the crystallization step was demonstrated.
KeywordSulfate-solution Phase-transformation Panzhihua Ilmenite White Pigment Sulfuric-acid Anatase Hydrolysis Dioxide Kinetics Decomposition
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie4030598
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSULFATE-SOLUTION ; PHASE-TRANSFORMATION ; PANZHIHUA ILMENITE ; WHITE PIGMENT ; SULFURIC-ACID ; ANATASE ; HYDROLYSIS ; DIOXIDE ; KINETICS ; DECOMPOSITION
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000329586100009
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8178
Collection研究所(批量导入)
Affiliation1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Longsheng,Liu, Yahui,Wang, Lina,et al. Production of Rutile TiO2 Pigment from Titanium Slag Obtained by Hydrochloric Acid Leaching of Vanadium-Bearing Titanomagnetite[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(1):70-77.
APA Zhao, Longsheng.,Liu, Yahui.,Wang, Lina.,Zhao, Hongxin.,Chen, Desheng.,...&Qi, Tao.(2014).Production of Rutile TiO2 Pigment from Titanium Slag Obtained by Hydrochloric Acid Leaching of Vanadium-Bearing Titanomagnetite.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(1),70-77.
MLA Zhao, Longsheng,et al."Production of Rutile TiO2 Pigment from Titanium Slag Obtained by Hydrochloric Acid Leaching of Vanadium-Bearing Titanomagnetite".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.1(2014):70-77.
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