Steel Ingots

Production of steel ingots by long furnace method

Steel ingots are intermediate steel rolling products,that are produced in two forms : billet or ingot and bloom or glass.

The billet has a cross section of less than 230 cm2 and is circular or square with a width of less than 15 cm and is mostly used for the production of rebars and wires.

Bloom has a cross section larger than 230 cm2 and is square with a width of more than 15 cm and less than 30 cm and is used to build rails,beams,cans,angles,studs,shields,ect…

Today,the technologies used in the production of steel ie casting and rolling, are more or less the same.

But to obtain molten or crude steel,various technologies such as blast furnace (BF), are furnace (EAF) and inductionfurnace (1MF) methods can be used.

Although most of the world’s crude steel production is generated by the blast furnace method,the use of the electric furnace method is more justifiable, especially in iran.

In this activity, the high furnace , the high furnace (BF) method is used to produce steel ingots ( billets and blooms). Indirect iron recovery is used in this method, wich is the traditional method of production.

First, iron ore is processed and agglomerated (pre-cooking processs and clumping of iron ore before charging to a high furnace in steel mills) with lime and coke entering the blast furnace and row iron or molten cast iron (pig iron) is obtained.

In the next step the crude iron is converted into molten steel in converter and after the removal of carbon and other impurities with the help of oxygen, crude steel is produced.

After the slag is discharged ,the molten steel is sent to the continuous casting unit by the molten transport pots.

In the continuous casting unit, the melt is poured into a mold and along the roller path is sprayed with cold water and turned into farzen ingots.

Finally, the produced steel ingots are cut to the desired lengths.