From influence of temperature being big in an iron manufacture principle during the operation in modified tatra steelmaking furnace method, the temperature of inside of whole in modified tatra steelmaking furnace was measured, and the non-equilibrium reaction temperature was examined. I did condition setting of simulation afterwards and made temperature distribution by ANSYS by analysis of temperature distribution in a furnace. The carbon content of "Kera" was around 1.5 mass%. I could grasp temperature distribution in modified tatra steelmaking furnace as a result of having done a temperature distribution simulation in a furnace and was able to confirm a generation part of "Kera", shape again.