The theoretical foundation for the XDEM was developed in 1999 by Peters, who described incineration of a wooden moving bed on a forward acting grate. The concept was later also employed by Sismsek et al. to predict the furnace process of a grate firing system. Applications to the complex processes of a blast furnace have been attempted by Shungo et al. Numerical simulation of fluid injection into a gaseous environment nowadays is adopted by a large number of CFD-codes such as Simcenter STAR-CCM+, Ansys and AVL-Fire. Droplets of a spray are treated by a zero-dimensional approach to account for heat and mass transfer to the fluid phase.