粒度对食品医药用硅藻土助滤剂渗透性能的影响

Effect of Particle Size on Permeability of Diatomite Filter Aid in Fields of Medicine and Food

为了给GB 24265—2009的逐步完善提供参考,以临江硅藻土助滤剂厂产食品医药用助熔焙烧品硅藻土助滤剂(ZBS)和食品医药用焙烧品硅藻土助滤剂(BS)为试样,采用硅藻土助滤剂渗透率测试装置考察了粒度对它们渗透性能的影响。结果表明,两种试样的渗透率随粒度的变化都可以用呈正比例关系的线性方程描述,但ZBS试样的粒度对渗透率影响更显著,而且在相同粒度下,ZBS试样的渗透率高于BS试样的渗透率。由渗透率与粒度关系的线性回归方程,得出食品医药用ZBS的d50范围应为24.6～131.4μm,食品医药用BS的d50范围应为2.9～79.8μm。

In order to give a reference for further improving the national standard GB 24265-2009,the baked diatomite filter aid（ZBS） and fluxing baked diatomite filter aid（BS） which were both produced for medicine and food in Linjiang diatomite filter aid factory were used as sample,and the testing device of diatomite filter aid＇s permeability was used to investigate the influence of particle size on the permeability of the ZBS and BS.The result showed that the equations of the permeability changing with the particle size of the two samples were in accord with the linear equation of direct proportion.But the particle size of ZBS sample had a more apparent effect on the permeability.When the particle size of the two samples was the same,the permeability of the ZBS was higher than the BS＇.Through the linear regression equation of the relationship between permeability and granularity,it could be concluded that the d50 ＇s range of ZBS for medicine and food should be 24.6 ～ 131.4 μm,and the d50 ＇s range of BS for medicine and food should be 2.9 ～ 79.8 μm.