• How to eliminate furnace bottom skulls?
  
• How to avoid variations in tapping weight?
• How to reduce electrode and energy consumption?
• How to make charging the scrap baskets more practical?
  

• ArcSave®, new generation electromagnetic stirrer EMS
• A specific stirring profile, controlling stirring intensity, duration and direction
• A new lower furnace shell made from nonmagnetic stainless steel
• A new temperature robot
  

• a more stabilized arc
• more homogeneous steel bath
• enhanced slag-metal reaction
• more consistent EAF tapping conditions and AOD operation
  

ArcSave, ABB’s patented* electric arc furnace electromagnetic stirrer (EAF-EMS) mounted underneath the furnace bottom creates a whole bath mixing effect thus accelerates the homogenization of the temperature and chemical composition of the steel, increasing yield. It also contributes to safer operations. The complete ArcSave system comprises the electromagnetic stirrer, a frequency converter, a transformer and a water station. Wherever possible, equipment is pre-assembled and tested before delivery, and preparatory work including installation takes place during available down times.

The ArcSave’s powerful electromagnetic stirring enhances the melting of large scrap items and makes stratification less significant due to forced convection. The forced convection in the whole melt is instrumental in generating a homogenous temperature distribution and high scrap melting rate. The melt velocity achieved is roughly ten times faster, as compared to just having natural convection in the bath, and results in less power on time.

Increased steel yields, as well as savings in scrap cost and conversion are achieved, given that manufacturers can more readily attain a low carbon and oxygen mix, with a reduction in the slag’s iron oxide (FeO) content.

Damage at the slag-line level is reduced due the stirrer’s ability to lessen super heat during power on, lower tapping temperatures, the decreased FeO content in the slag and the diminished oxygen in the steel. As most critical damage tends to occur at the slag-line, by optimizing performance here, ArcSave helps producers enjoy refractory repair savings.

^{* ArcSave is a patented technology, ABB has several patents in this area including the ability to stir during tapping which breaks vortex formation in the melt}