Method and apparatus for cleaning slag

The invention relates to a method and an apparatus for cleaning slag from a non-ferrous metal (NE) - or iron alloy production process. For this, the obtained in said manufacturing processes slag is typically continuously fed into a Absetzofen where it is heated and treated metallurgically. In order to improve the environmental impact resulting from this treatment first residual slag, the invention provides a tapping of the first residual slag into a ladle 120, analyzing the composition of the first residual slag and finally introducing at least one gaseous medium on or in the first residual slag prior to metallurgically-physical reaction to a second residual slag in the pan. The gaseous medium is selected as a function of the analyzed composition of the individual first residual slag. In addition, the slag can be heated optional. Thereafter, a transport in a second Absetzofen 140 and there is a settling of the finely divided metal in the slag is optional.