超细二氧化钛的离心分离实验研究

对超细二氧化钛(锐钛型)和去离子水体系的水分散度以及离心分离性能进行了实验研究,讨论了实验结果与传统离心分离理论的差别.在此基础上,认为产生这种差别的原因是超细二氧化钛在离心力场中发生了团聚,从而使得原始粒径较小的超细颗粒在小于极限粒径时仍然能够进行分离.提出极限浓度的概念,指出当残液浓度低于该浓度时,颗粒发生团聚较为缓慢,难以形成较大颗粒团聚体从而使得分离终止.

Experimental Study on Centrifugal Separation of Ultrafine Titanium Dioxide

In this paper, experiments on dispersion degree and centrifugal separation performance of ultrafine titanium dioxide (anatase) and de- ionized water were made, and the difference between experimental result and traditional centrifugal separation theory was observed and discussed. It was considered that the ultrafine titanium dioxide particles aggregated in a continuous suspension in the centrifugal field, so that original ultrafine particles could be se- parated under the smaller centrifugal number. The limited concentration was presented. The particles could hardly aggregate when the concentration of supernatant was below limited concentration, therefore these couldn't be separated.