Abstract:
A method is described for reducing NO x emissions and improving energy efficiency during mineral processing in a rotary kiln (10). The method comprises injection of air with high velocity/high kinetic energy into the kiln (10) to reduce or eliminate stratification of kiln gases. The method can be applied to mix gases in a rotary kiln vessel (12) or in a preheater/precalciner vessel.
Abstract:
A method is described for reducing NOx emissions and improving energy efficiency during mineral processing in a rotary kiln (12). The method comprises injection of air (32) with high velocity/high kinetic energy into the kiln to reduce or eliminate stratification of kiln gases. The method can be applied to mix gases in a rotary kiln vessel or in a preheater/pecalciner vessel.