Abstract:The sinter size, mass flow of inlet, material height, porosity and inlet temperature are the main parameters in affecting the waste heat recovery efficiency. Through researching a 360m2 sinter cooler in an iron and steel company and heat transfer characteristics in sinter cooling process, the mathematical models of heat transfer were established. Based on the FLUENT 6.3, the two-equation energy model of non-equilibrium thermodynamics in porous media was built up by user-defined-scalar and user-defined-function. The five parameters were optimized to improve the waste heat recovery efficiency of the sinter cooler, and the optimal combination of these parameters was approved by orthogonal experimental method. Comparing the test data and the model prediction, it is shown that the model prediction and the real operation are in good agreement, this study provides a reliable theoretical basis in waste heat recovery efficiency in sinter.