D.C. arc furnace having electrically conductive hearth and metho
D.C. electric arc furnace with consumable and fixed electrode ge
D.C. furnace with a hearth electrode, hearth electrode and elect
DC arc furnace
DC arc furnace
DC arc furnace
DC arc furnace
DC Arc furnace component
DC Arc furnace having a shielded arc
DC arc furnace having starting equipment
DC Arc furnace hearth connection
DC Arc furnace hearth construction
DC Arc furnace improved hearth construction
DC arc furnace improved hearth construction
DC Arc furnace power connection system
DC electric arc melting apparatus
Device for charging an electric furnace
Device for feeding one or a plurality of electrodes in an electr
Device for improved slag retention in water cooled furnace...
Device for lifting and moving the roof of a spray cooled furnace