摘要
为了研究不同粒径玻璃微珠堆积时粒径比及细颗粒体积分数对体系堆积率的影响规律,通过振实密度仪测试体系的堆积率并与堆积率的数学模型计算结果进行比较。结果表明,Furnas模型与实验值吻合较好(R≤7)。两种粒径玻璃微珠堆积时,随粗细粒径比R的增大,堆积效率提高。细颗粒的体积分数为0.3左右时,堆积率达到最大。三种粒径玻璃微珠堆积时,体积比为7∶1∶2或6∶1∶3可使堆积率达到最大。修正后的Furnas模型可使二组分堆积计算值与实验值的误差低于1%(R≤7)。通过引入当量直径并结合修正后的Furnas模型,可使三组分堆积率的估算误差低于2%。
To research the influencing rule of radius ratio and the volume fraction of fine particles on vibratory packing efficiency while glass beads with different particle size packs, the packing efficiency of the system is tested by a tap density analyzer and compared with the calculation results of some typical packing models. The results show that the Furnas model agrees well with the experimental data （R≤ 7）. In binary packing mixtures, the packing efficiency is higher when R increases. The packing efficiency reaches the maximum value when the volume fraction of fine glass beads is about 0.3. The packing efficiency reaches the maximum value when the volume fraction of coarse-middle-fine glass beads is 7：1：2 or 6：1：3 in ternary packing mixtures. The error of packing efficiency of binary packing mixtures is less than 1% by using the modified Furnas model（R≤7 ）. Estimated by the combining modified Furnas model with an equivalent diameter, the error of the packing efficiency of ternary packing mixtures is less than 2%.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2012年第3期540-544,共5页
Journal of Nanjing University of Science and Technology
关键词
玻璃微珠
粒度级配
振实堆积率
堆积模型
粒径比
glass beads
particle size gradation
vibratory packing efficiency
packing models
radius ratio
