Effect of sinter layer porosity distribution on flow and temperature fields in a sinter cooler  

作　　者：Jik-chang Leong Kai-wun Jin Jia-shyan Shiau Tzer-ming Jeng Chang-hsien Tai 

机构地区：[1]Department of Vehicle Engineering, Pingtung University of Science and Technology [2]Iron Making Process Development Section, Steel & Aluminum Research & Development Department [3]Department of Mechanical Engineering, Air Force Institute of Technology

出　　处：《International Journal of Minerals,Metallurgy and Materials》2009年第3期265-272,共8页矿物冶金与材料学报（英文版）

摘　　要：When sinters are filled into the sinter cooler from the sintering machine, it is commonly seen that, due to segregation effects, sinters of larger size usually accumulate closer to the inner wall of the sinter cooler, whereas those of smaller size are to the outer wall. This nonuniform distribution of sinters has led to uneven cooling effect throughout the cooler. This causes the sinters leaving the cooler at a large temperature difference. This undesired temperature difference leads to the deformation and even the destruction of the conveyors. The computational fluid dynamics （CFD） technique was used in the present work to investigate the heat and fluid flow phenomena within the sinter cooler corresponding to the different distribution of sinter layer porosity, which was highly dependent on the arrangement and orientation of sinters within the sinter cooler. It is confirmed that a high mass flow rate within the sinter layer causes a low temperature region and vice versa. The flow fields for vertically reducing porosity distribution and random distribution are almost identical indicating the relative insignificance of convective heat transfer mechanism.When sinters are filled into the sinter cooler from the sintering machine, it is commonly seen that, due to segregation effects, sinters of larger size usually accumulate closer to the inner wall of the sinter cooler, whereas those of smaller size are to the outer wall. This nonuniform distribution of sinters has led to uneven cooling effect throughout the cooler. This causes the sinters leaving the cooler at a large temperature difference. This undesired temperature difference leads to the deformation and even the destruction of the conveyors. The computational fluid dynamics （CFD） technique was used in the present work to investigate the heat and fluid flow phenomena within the sinter cooler corresponding to the different distribution of sinter layer porosity, which was highly dependent on the arrangement and orientation of sinters within the sinter cooler. It is confirmed that a high mass flow rate within the sinter layer causes a low temperature region and vice versa. The flow fields for vertically reducing porosity distribution and random distribution are almost identical indicating the relative insignificance of convective heat transfer mechanism.

关 键 词：steel plant sinter cooler SINTER POROSITY heat transfer packed bed 

分 类 号：TF046[冶金工程—冶金物理化学]