High amounts of Steel Mill Dust is produced worldwide each year. Although the Waelz kiln is the preferred route for processing these wastes, significant amounts of this residue stays untreated. Very often, the unprocessed dust gets landfilled and therefore, it is lost for the recovery of zinc and further heavy metals accompanied in the waste. An alternative way with respect to treating Electric Arc Furnace Dust would be the so called 2^sDR (Two step Dust Recycling) process, which allows the simultaneous recovery of high purity zinc oxide as well as iron and other heavy metals. This leads to a zero waste process, because the remaining slag is free of heavy metals which allows a utilization for e.g. construction purposes. The present publication should give an overview on the process set-up itself; moreover, achieved data from extended lab scale trials underlines the sustainability of this process.