(4) Basic oxygen furnace (oxygen lance) is the newest of the steel production
methods and rapidly growing in importance because of its speed and efficiency.
Very tall monitor roof
Multistoried steel frame with a large flue exiting from the roof
Dust catcher and exhaust stack unit
Oxygen storage tanks.
The basic oxygen furnace (BOF) is a pear-shaped or spherical steel
vessel mounted on trunnions similar to the Bessemer converter (Figure 2-66).
Figure 2-66. BOF.
Like the converter, the BOF is rotated forward for charging through an
open mouth and returned to the vertical position for operation.
However, in the
BOF, a water-cooled lance is lowered into the vessel, and a stream of pure gaseous
oxygen is directed on the molten charge.
79 IT 0673