The EAF has the largest growth potential both in terms of production capacity and technology evolution. Future EAF will be equipped with all modern technologies- like Ultra high power input (up to, latest oxygen and carbon injection technology and design features- like ultra high shell design, heavy mill type components.
This combination leads to an Electric Arc Furnace where the tap to tap times can be extremely short and the corresponding productivity reaches the level of larger furnace sizes or converter plants.
The two main reasons for this are:
The possibility of a higher electrical power input and
A far higher efficiency of chemical energy, decarburization and scrap preheating compared to the same size (tap weight) standard furnace.
It is interesting to compare a conventional 120ton EAF with the ultimate 120 ton EAF.
Transformer design upto 1,000kVA/t,
120MVA for 120 ton tapping weight,
Secondary voltage up to 1,200V
Transformer design upto 1,500kVA/t,
180MVA for 120 ton tapping weight,
Secondary voltage up to 1,500V
Utilization of chemical energy
3 oxygen gas burners
3 refined combined burners (RCB)
2 carbon injectors
Utilization of chemical energy
3 oxygen gas burners
5 refined combined burners (RCB)
4 carbon injectors
4 post combustion injectors
Refined Combined Burner (RCB) technology combines a conventional oxy/gas burner with a supersonic oxygen injection lance and is designed to optimize the injection of carbon and oxygen into EAF. It supplies chemical energy through chemical reactions of fuel and gas, oxygen, and carbon injected into the furnace.
, latest oxygen and carbon injection technology and design features- like ultra high shell design, heavy mill type components.
