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Crystallization behaviors of bayerite from sodium chromate alkali solutions
Alternative TitleTrans. Nonferrous Met. Soc. China
Wei, Guang-ye1,2; Qu, Jing-kui1; Zheng, Yu-dong2; Qi, Tao1; Guo, Qiang1; Han, Bing-bing1; Zhao, Hong-xin1
2014-10-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume24Issue:10Pages:3356-3365
AbstractIn order to clean production of chromium compounds, it is a critical process to remove aluminates and utilize aluminum compounds from artificial chromate alkali solutions. The effects of Na2CrO4 on the neutralization curve, Al(OH)(3) precipitation efficiency and induction period of bayerite were investigated. The results indicate that the neutralization curve of the artificial chromate alkali solutions shows three distinct regions and its induction period is longer than that of pure sodium aluminate solutions at the same aluminum concentration. And the decreased temperature and volume fraction of CO2 enhance the particle size of bayerite beta-Al(OH)(3). Bayerite composed of agglomerates of rods and cone frustums was obtained from alkali metal chromate solutions with 28.5% CO2 (volume fraction) at temperatures ranging from 50 degrees C to 70 degrees C. Coarse bayerite with particle size (d(50)) from 24.2 mu m to 29.3 mu m extremely has few impurities, which is suitable for comprehensive utilization.; In order to clean production of chromium compounds, it is a critical process to remove aluminates and utilize aluminum compounds from artificial chromate alkali solutions. The effects of Na2CrO4 on the neutralization curve, Al(OH)(3) precipitation efficiency and induction period of bayerite were investigated. The results indicate that the neutralization curve of the artificial chromate alkali solutions shows three distinct regions and its induction period is longer than that of pure sodium aluminate solutions at the same aluminum concentration. And the decreased temperature and volume fraction of CO2 enhance the particle size of bayerite beta-Al(OH)(3). Bayerite composed of agglomerates of rods and cone frustums was obtained from alkali metal chromate solutions with 28.5% CO2 (volume fraction) at temperatures ranging from 50 degrees C to 70 degrees C. Coarse bayerite with particle size (d(50)) from 24.2 mu m to 29.3 mu m extremely has few impurities, which is suitable for comprehensive utilization.
KeywordChromate Alkali Solutions Bayerite Carbonization Crystallization Precipitation Efficiency
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/S1003-6326(14)63477-4
URL查看原文
Indexed BySCI
Language英语
WOS KeywordALUMINATE SOLUTIONS ; NEUTRALIZATION ; GIBBSITE ; TRIHYDROXIDE ; NUCLEATION ; HYDROXIDE ; LIQUORS ; GROWTH ; OXIDE ; IONS
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000345542700037
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11855
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Univ Sci & Technol, Sch Mat Sci & Engn, Beijing 10083, Peoples R China
Recommended Citation
GB/T 7714
Wei, Guang-ye,Qu, Jing-kui,Zheng, Yu-dong,et al. Crystallization behaviors of bayerite from sodium chromate alkali solutions[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2014,24(10):3356-3365.
APA Wei, Guang-ye.,Qu, Jing-kui.,Zheng, Yu-dong.,Qi, Tao.,Guo, Qiang.,...&Zhao, Hong-xin.(2014).Crystallization behaviors of bayerite from sodium chromate alkali solutions.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,24(10),3356-3365.
MLA Wei, Guang-ye,et al."Crystallization behaviors of bayerite from sodium chromate alkali solutions".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 24.10(2014):3356-3365.
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