Influences of seed size and number on agglomeration in synthetic Bayer liquors

来源期刊：中南大学学报(英文版)2006年第5期

论文作者：张斌 周科朝 陈启元

文章页码：511 - 514

Key words：bayer process ; seeded precipitation; screen separation; agglomeration

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 5μm, especially below 2μm, 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.