The slag discharged from the E.A.F. Steel-making company I. contains ;~ppraxim;rtely 21% iron. 8% of the lron arccovered from the slag by hand-picking and lnagrlctlc scparatians. 13% af the unrecovered iron rrorn slag is discarded orused for roadbed and reclamation utilization. While most of tllz onrzc<~veredir on m in a s~mples tate of metal, a smallportion of the iron is in a combl~~estda te with alkalinc earlhs clcrnent. The unrecavcred and discarded iron can. Ihnetore,be recovered by a crushing separation technique and magnetic sepuratlon. Since the major componenl.; oi the slag consistsof FeO, CaO, SiO,, MgO and MnO, the slag can bc used as a flux for the steel-making induatly using scrap iron as rawmaterials. Thc slag can be used as heavy aggregates for constmction becausz the specific g~nvity of the slag is hlghcr thanlhal of ordinary aggregates. Far aggregates. the slag nceds a long aging periud. The non-metallic siag(meta1-removcd rlilg)can be used as the raw material for ccmcnt. The reulilizing both melallic and "an-metafllc slag requires the pleclse cant~olof gram m ea nd compancnts w~thrc spect to using purpose nf (he slaging purpose nf (he slag