| Influences of seed size and number on agglomeration in synthetic Bayer liquors |
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| 作者姓名： | 张斌 周科朝 陈启元 |
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| 作者单位： | [1]State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China [2]School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
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| 摘 要： | By means of Malvern laser particle size analyzer and scanning electron microscopy, the influences of seed size and number on agglomeration in Bayer process were investigated. Agglomeration is almost finished in 8 h, seeds, below 5 μm, especially below 2 μm, gather together rapidly and almost disappear in 8 h. In the same supersaturation of aluminate solution and seed size, the smaller the number of seed is, the bigger the degree of agglomeration is. With the same primary number of seed, the agglomeration of larger seed is superior to that of small seed, and the agglomeration does not happen among the coarse seeds. The agglomeration mainly happens among fine particles, and the combinations among the fine particles are unconsolidated.
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| 关 键 词： | 拜耳法 晶种析出 筛分 炼铝 |
| 文章编号： | 1005-9784（2006）05-0511-04 |
| 收稿时间： | 2005-11-25 |
| 修稿时间： | 2006-01-10 |
Influences of seed size and number on agglomeration in synthetic bayer liquors |
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| Zhang Bin , Zhou Ke-chao and Chen Qi-yuan.Influences of seed size and number on agglomeration in synthetic Bayer liquors[J].Journal of Central South University of Technology,2006,13(5):511-514. |
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| Authors: | Zhang Bin Zhou Ke-chao and Chen Qi-yuan |
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| Affiliation: | (1) State Key Laboratory of Powder Metallurgy, Central South University, 410083 Changsha, China;(2) School of Chemistry and Chemical Engineering, Central South University, 410083 Changsha, China |
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| Abstract: | By means of Malvern laser particle size analyzer and scanning electron microscopy, the influences of seed size and number
on agglomeration in Bayer process were investigated. Agglomeration is almost finished in 8 h, seeds, below 5 μm, especially
below 2 μm, gather together rapidly and almost disappear in 8 h. In the same supersaturation of aluminate solution and seed
size, the smaller the number of seed is, the bigger the degree of agglomeration is. With the same primary number of seed,
the agglomeration of larger seed is superior to that of small seed, and the agglomeration does not happen among the coarse
seeds. The agglomeration mainly happens among fine particles, and the combinations among the fine particles are unconsolidated.
Foundation item: Project(G19990649) supported by the National Key Fundamental Research and Development Program of China; project (59874031)
supported by the National Natural Science Foundation of China |
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| Keywords: | bayer process seeded precipitation screen separation agglomeration |
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