Tomography-Based Determination of the Effective Transport Properties for Iron Ore Sinter

摘要：

　　In the steel smelting process,the aspects of iron ore sinter cooling has important realistic meaning for steel industrys energy saving and environmental improvement.The topology and icrostructure of the porous sintered ore play an important role in determining the effective heat transfer and fluid flow properties for the cooling process of sintered bed.X-ray omography has been applied to the investigation of the structure of iron ore sinter according to some Iiteratures.In this work,three samples mployed in industrial steel smelting process are imaged with axial μ-CT using a Skyscan X-ray scanner.From the tomographic data,we estimate some structural properties of iron ore sinter samples such as the porosity,the volume and the quivalent diameter of open and closed pores,pore-size distribution and so on.In addition,the resulting image stack of one sample is reconstructed to produce unstructured,body-fitted,tetrahedral mesh representing the solid and interstitial pore regions.The resulting mesh is then employed for direct pore-level numerical simulation(DPLS)to numerically calculate its effective transport properties-effective thermal conductivity,permeability,Dupuit-Forchheimer coefficient,and interfacial heat transfer coefficient.The effective thermal conductivity and permeability data are compared with analytical models developed for spherical particle beds.The sample is found to be anisotropic with respect to the effective thermal conductivity.The interfacial heat transfer coefficient is compared against a correlation from the literature based on experimental data obtained with spherical particle beds.

关键词： Iron Ore Sinter Cooling X-ray Tomography Porous Media Effective Properties Direct Pore-Level Numerical Simulation (DPLS)

作者: X.Yuan J.Zhang J.Wang Y.Liu J.Yang Q.W.Wang

作者单位: Key Laboratory of Thermal-fluid Science and Engineering,Ministry of Education,Xian Jiaotong University,Xian,Shaanxi,710049,China

会议类型: 国际会议

会议名称: 第26届效率、成本、优化、模拟及环境影响能源系统国际会议

会议地点: 桂林

会议语种:英文

页码: 1-13

在线出版日期: 2013-07-16（万方平台首次上网日期，不代表论文的发表时间）