Continuous differential sedimentation of a binary suspension
Continuous differential sedimentation of a binary suspension
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DOI：
10.1016/0032-5910(96)03101-4
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发表时间：
1996-07
影响因子：
5.2
通讯作者：
A. Spannenberg;J. Raven;M. Scarboro;K. Galvin
中科院分区：
文献类型：
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作者：
A. Spannenberg;J. Raven;M. Scarboro;K. Galvin
在连续沉降条件下，使用1.50 m的自由沉降区深度，对二元悬浮液的差异沉降进行了实验研究。进料悬浮液由具有17.4 ± 0.2%-45μm（细物质）和82.6 ± 0.2%-310 + 212 μm（粗物质）的球蛋白在45重量%水溶液中的混合物组成。甘油溶液。粗粒物质到达底流，具有明确的前缘，在约0.1 h内达到稳定状态。细粒物质同时到达，但需要超过0.6小时才能达到稳定状态，导致细粒物质不成比例地积累，因此自由沉降区的细粒组成为61 ± 1%。精细物种的浓度提前线前增加，在一个一阶的方式。它被证明，使用一维模型，该结果可以被解释为允许由粗颗粒的细粉前的侵蚀，和两个战线之间的混合区的形成。
The differential sedimentation of a binary suspension was examined experimentally under continuous sedimentation conditions, using a free-settling zone depth of 1.50 m. The feed suspension consisted of a mixture of ballotini with 17.4 ± 0.2% − 45μm (fine species), and 82.6 ± 0.2%− 310 + 212 μm (coarse species) in an aqueous 45 wt.% glycerol solution. The coarse species arrived in the underflow with a well-defined front, achieving steady state within about 0.1 h. The fine species arrived at the same time, but took more than 0.6 h to reach steady state, resulting in a disproportionate accumulation of the fine species, and, hence, a free-settling zone composition of 61 ± 1% fines. The concentration of the fine species ahead of the lines front increased in a first order fashion. It was demonstrated, using a one-dimensional model, that the results could be explained by allowing an erosion of the fines front by the coarse particles, and the formation of a mixing zone between the two fronts.