Dissection research is the most meaningful way to understand the internal conditions of blast furnace. Because it can obtain samples from hearth after a blast furnace was shut down. In this paper, a 2200 m³ commercial blast furnace was shut down with residual iron remained inside. And then core drilling method was used to obtain a horizontal sample of residual iron, which was located 1610 mm below the centerline of taphole and had a length of 1840 mm. A variety of techniques, such as scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), Optical Microscope, X-ray diffraction (XRD) and Raman spectroscopy were applied to analysis the microscopic morphology, phase composition and properties distribution of residual iron samples at different position. The results show that complex phases appear near the cold side, including Fe, C, Ti₃N₂, KAlSi₂O₆ and Al₂O₃. And distribution of properties along the core sample from inside to cold side like density, degree of graphitization and thermal diffusion also have a big change. These results are considered to be related to the function of cooling system.

解剖研究是了解高炉内部条件的最有意义的方法。因为它可以在高炉关闭后从炉膛中获取样品。在本文中，2200 m ³关闭了商业高炉，内部残留铁。然后采用岩心钻进法获得水平铁渣样品，其水平方向位于出铁口中心线下方1610 mm，长度为1840 mm。扫描电镜-能谱仪（SEM-EDS），光学显微镜，X射线衍射仪（XRD）和拉曼光谱仪等多种技术被用于分析残留铁样品的显微形态，相组成和性质分布在不同的位置。结果表明，在冷侧附近出现了复杂的相，包括Fe，C，Ti ₃ N ₂，KAlSi ₂ O ₆和Al ₂ O _3。。而且，沿着核样品从内部到冷侧的性质分布，例如密度，石墨化程度和热扩散也有很大变化。这些结果被认为与冷却系统的功能有关。