3D-modelling of the radiative heat transfer in a rotary kiln for iron ore pellets production

Övrigt konferensbidrag, 2015

This paper presents work focused on the development, evaluation and use of a 3D-model for investigation of the radiative heat transfer in rotary kilns. The model applies the discrete-ordinates method to solve the radiative transfer equation considering emission, absorption and scattering of radiation by gas species and particles. The model uses input of temperature, particle distribution and gas composition in the radial, axial and angular directions. The model is compared with literature data and a 1D-model for validation. The model is tested in its capability to model radiative intensity using experimental data from a 400 kW rotary kiln test furnace and used to calculate the radiative heat flux to the wall using different temperature and particle loads as well as different fuels and fuel combinations. The results show that the 3D-model can be used to predict trends when operating conditions are changed.