| Nucleation during gibbsites precipitation with seeds from sodium aluminate solution processed under ultrasound |
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| 作者姓名： | 陈国辉 陈启元 尹周澜 张斌 |
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| 作者单位： | College of Chemistry and Chemical Engineering，College of Chemistry and Chemical Engineering，College of Chemistry and Chemical Engineering，College of Chemistry and Chemical Engineering Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划) |
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| 摘 要： | 1 INTRODUCTIONItisknown14 ] thatnucleationcanbehastenedbyultrasoundduringthecrystallizationofsolutions .Forsodiumaluminatesolutionwithhighviscidityandsurfacetension ,primarynucleationisdifficulttotakeplacewithoutseedsunderindustrialconditions58] .When gibbsitesareprecipitatedfromliquorwithseeds,therearemanysecondarynucleinearthede fectsandactivesitesofsurfacesofseedsandsec ondarynucleationdependsmuchonthe qualityofseeds.Accordingto particledistributiondata911] ,thediametersofnewcritic…
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| 关 键 词： | 超声波 铝土矿 铝酸钠溶液 形核 晶种分解 氧化铝 |
Nucleation during gibbsites precipitation with seeds from sodium aluminate solution processed under ultrasound |
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| CHEN Guo-hui,CHEN Qi-yuan,YIN Zhou-lan,ZHANG Bin.Nucleation during gibbsites precipitation with seeds from sodium aluminate solution processed under ultrasound[J].Transactions of Nonferrous Metals Society of China,2004,14(2):401-405. |
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| Authors: | CHEN Guo-hui CHEN Qi-yuan YIN Zhou-lan ZHANG Bin |
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| Abstract: | The secondary nucleation during gibbsite precipitation with seeds from sodium aluminate solution processed by ultrasound was examined by particle size distribution(PSD) analyses. Experiments indicate that at low temperature(＜65 ℃ ) and with low frequency ultrasound, the precipitation efficiency and also the secondary nucleation can be improved. Solution processed by low frequency ultrasound has more nuclei than common liquor does at low temperature. At 55 ℃, precipitation efficiency can he improved by 5.31 %, and the effect promoted by low frequency ultrasound decreases with the increase of temperature. |
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| Keywords: | sodium aluminate solution ultrasound particle size distribution secondary nucleation |
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