In order to improve the accuracy of the porosity results of pellets, the reliability of three methods for measuring the pore structure was compared. The results show that there is a measurement error in the result of the traditional method, the mercury intrusion porosimetry (MIP) cannot detect closed pores, and the result of scanning electron microscope (SEM) method is more comprehensive. Additionally, three types of pore structures have been proposed to describe the pore formation mechanism of pellets, namely original pores, pores left by shrinkage of liquid phase and pores left by induration of mineral particles. Furthermore, the pore structures of pellets were analyzed by MIP and SEM. The results reveal that MIP can measure the pores with diameters less than 1 μm, and the pore diameters measured by SEM range from 1.2 to 89.2 μm. Finally, the curvature of the pores is measured to evaluate the consolidation degree of the pellet.

为了提高颗粒孔隙率结果的准确性，比较了三种测量孔结构的方法的可靠性。结果表明，传统方法的测定结果存在测量误差，压汞法不能检测出闭孔，而扫描电镜法的测定结果更为全面。另外，已经提出了三种类型的孔结构来描述粒料的孔形成机理，即原始孔，液相收缩留下的孔和矿物颗粒的硬化留下的孔。此外，通过MIP和SEM分析颗粒的孔结构。结果表明，MIP可以测量直径小于1μm的孔，并且通过SEM测量的孔径范围为1.2至89.2μm。最后，