1. Re-heating furnace
2. Chimney
3. Recuperator
4. Furnace discharging system
5. Furnace charging system
   

Reheating of billets

A- Re-heating furnace

When developing furnace steel projects thermal and mechanical internal stresses that the furnace can encounter in its working period are taken into account.

Both dilatations and shrinkages that will occur in refractory material and dilatations and shrinkages that will occur in the steel structure itself are balanced with the mechanisms which are applied to the system.

Products:

Type..........................................................................................................................Billets

Steel grades............................................................................................................ Carbon Steel (Bisra 3)

Sections .................................................................................................150x150; 125x125

Length…………………………………………………………………3000 mm - 12000 mm

Maximum weight ................................................................ 530 kg - 2195 kg 

Reference product:

Type .............................................................................................................Billet

Steel grade....................................................................... Carbon Steel (Bisra 3)

Dimensions............................................................................ 150x150x12000 mm

Weight .................................................................................................2195 kg

Temperature conditions:

Charging temperature for reference ...........................................................ambient (30 ºC)

Discharging temperature for reference .................................. 1250 ºC (on product surface)

Fuel:

Natural gas with LCV................................................................................... 8600 kcal/Nm3

Charging method ....................................................................................... lateral by means of charging roller table and pusher

Billet arrangement......................................................................................................... 1 (3 m) - 1 (12m)

Discharging method ................................................................................... lateral by means of discharging roller table and ejector machines

Features:

• Lower investment cost
• Lower foundation cost
• Lower maintenance cost
• Easier to operate
• Low water consumption

B- Chimney

Iron sheet chimney whose diameter and height calculation are made according to furnace capacity.

C- Recuperator

Within the furnace, gases flow from the discharge end to the charge end and exit through the furnace up take located at the charge end to a refractory lined waste gas duct.

The waste gases flow through the recuperator and the stack to the atmosphere.

A damper valve system, for furnace pressure control, will be located in the waste gases flue, between the recuperator and the stack.