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Crystallization behaviors of bayerite from sodium chromate alkali solutions 被引量:2
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作者 魏广叶 曲景奎 +4 位作者 郑裕东 齐涛 郭强 韩冰冰 赵宏欣 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第10期3356-3365,共10页
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 Na2 Cr O4 on the neutralizatio... 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 Na2 Cr O4 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 β-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 °C to 70 °C. Coarse bayerite with particle size(d50) from 24.2 μm to 29.3 μm extremely has few impurities, which is suitable for comprehensive utilization. 展开更多
关键词 chromate alkali solutions bayerite CARBONIZATION CRYSTALLIZATION precipitation efficiency
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