Steel quality aspects     

1. Due to continuous slag flushing, turndown P can be obtained up to 0.008% and sulphur up to 0.025%.
   
   
2. High % hot metal produces a product with very low tramp elements, Advantages for die forging steels, special clean steels and steels for seamless piper etc.
   
   
3. High CO partial pressure during the blow leads to very low N and H content in steel at turndown.

Basic Characteristics

Standard capacities of EOF are available in capacities 30/40 t, 60/ 80 t and 100/ 120 t.

Hearth surface is 6.6 to 22 square meters

Shell diameter is around 5.3 to 7.5m

Total height from working platform to top level =17 to 25 m

No. of scrap-preheater staged 1to 2

Tilting tapping angle  


Main equipments description

1. Bottom car (2unit) is used for quick bottom exchange for a new campaign. One bottom car supports the EOF for operation and the other supports a second bottom for relining. Tilting is allowed at high speed hydraulic cylinders to allow slag free tapping.
   
   
2. Gas cleaning plant is wet system.
   
   
3. EOF has facilities for charging and weighing of bulk material and ferro-alloys.

Advantages

1. Flexibility to in terms of metallic charge
2. No need of electric energy
3. High productivity
4. Low tramp elements
5. Low inclusions due to slag free toppings

Energy saving is due to

1. Post combustion (95%)
2. Scrap preheating  
3. High operational of flexibility.

Consumption of raw materials/ ton of liquid steel 

Hot metal and scrap+ pig iron are charged in 70% :30% proportion

Lime 45 kg/t (depending on P content of HM) 

  is consumed at 50-70 N cu.m./t

Fuel consumption is 5-10 M cal/t

Tapping-  without ladle furnace and  with ladle furnace.