Estimation method of electric furnace slag coating thickness by unsteady heat transfer analysis

摘要

PPROBLEM TO BE SOLVED: To provide a heat transfer analysis method for accurately estimating the thickness of a slag coating at an electric furnace side wall by an unsteady heat transfer analysis. PSOLUTION: In the method, the furnace side wall is modeled using a finite element method, the unsteady heat transfer analysis is performed from a heat flow amount from the inside to the outside of the furnace and a measured temperature of a furnace wall brick, and the thickness of the slag coating of the side wall is estimated from the obtained analyzed result. By treating the physical property of the slag coating portion in the finite element model as molten slag when a temperature reaches a slag melting point temperature or higher and as solidified slag when the temperature is lower than a slag melting point, and setting the specific heat of the molten slag 0 kJ/kg*C, an influence on a heat passage to the molten slag is eliminated and a face that is a border between the molten slag and the solidified slag becomes a face for constantly receiving a thermal load. PCOPYRIGHT: (C)2009,JPO&INPIT