Steel is an alloy of iron and carbon with other elements like magananese, silicon ,and phosphours.There are different process for the manufacture of steel.
1 . OPEN HEARTH PROCESS
In this process pig iron is converted into steel using open hearth furnace.The process may be acidic or basic on the phosphorus content in the pig iron.
2. BESSEMER PROCESS
In this process a furnace known as BESSEMER converter is used to convert pig iron into steel.The quantity steel obtained from this process is not so fine as that from open hearth.
3. BASIC OXYGEN PROCESS
In this process the furnace used is some what like a bessmer converter of large size.Oxygen is blown through a water cooled lance.High quality steel is obtained at a faster rate.This process is also known as L.D process.I is named after two plants in Australia at LINZ and DONEWITZ.
4. ELECTRIC FURNACE PROCESS.
High quality special grade steel is produced in electric furnace and high freequency induction furnaces are in use.