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Crystallization of gibbsite from synthetic chromate leaching solution in sub-molten salt process
Zhang, Pei-yu1,2; Wei, Guang-ye1; Guo, Qiang1; Qu, Jing-kui1; Qi, Tao1
2015-08-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume25Issue:8Pages:2734-2743
Abstract

For the clean and economical production of chromium compounds, it is crucial to remove aluminates from chromate alkali solutions and utilize aluminum-containing compounds. In this work, carbonization was used to remove aluminates from a synthetic chromate leaching solution containing a high K2O/Al2O3 mole ratio. The influence of reaction temperature, carbonization time, flow rate of carbon dioxide, and seed ratio on the precipitation of Al was investigated. The optimal output was obtained under the following experimental conditions: a reaction temperature of 50 degrees C, a carbonization time of 100 min, a carbon dioxide flow rate of 0.1 L/min, and a seed ratio of 1.0. Gibbsite was obtained following carbonization. The structure and morphology of the gibbsite were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and laser particle size analyzer. The particle size distribution and morphology of the gibbsite were significantly influenced by the experimental conditions. The gibbsite had a mean particle size (d(50)) of 16.72 mu m. The thermal decomposition of the gibbsite was analyzed by XRD and the decomposition path was determined. The obtained coarse alpha-Al2O3 precipitate, which contains 0.08% Cr2O3 and 0.10% K2O, was suitable for subsequent utilization.

KeywordGibbsite Secondary Nucleation Carbonization Chromate Leaching Solution
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/S1003-6326(15)63898-5
Indexed BySCI
Language英语
WOS KeywordALUMINUM-HYDROXIDE ; CHROMITE ORE ; CO2 CAPTURE
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000360052300033
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19488
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Pei-yu,Wei, Guang-ye,Guo, Qiang,et al. Crystallization of gibbsite from synthetic chromate leaching solution in sub-molten salt process[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2015,25(8):2734-2743.
APA Zhang, Pei-yu,Wei, Guang-ye,Guo, Qiang,Qu, Jing-kui,&Qi, Tao.(2015).Crystallization of gibbsite from synthetic chromate leaching solution in sub-molten salt process.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,25(8),2734-2743.
MLA Zhang, Pei-yu,et al."Crystallization of gibbsite from synthetic chromate leaching solution in sub-molten salt process".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 25.8(2015):2734-2743.
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