Metal Recovery and Filler Production from Steel Slag - Loeschesteel slag combines all the advantages of conventional processes: . LD slag. •. Metallurgically modified slag. Following coarse slag processing (recovery of metal e.g. + 20 mm, crushing of the mineral components to -20 mm) by means of crush- . plant, a high grade metal fraction is discharged via a chute outlet in.steel slag recovery plant,First dry processing plant for stainless steel slag installed by .Nov 27, 2013 . The first dry processing plant for stainless steel slag has been installed and developed by Loesche, together with CALA Aufbereitungstechnik & Co. KG, for the Belgian company RECOVAL.