(c)
The smoke and dust resulting from the oxidation of the impurities and
carbon in the iron are collected in a large hood and flue assembly that is fitted
over the mouth of the BOF.
(d)
These pollutants are directed from the furnace building and into a
large dust catcher. The efficiency of the BOF over the converter is the result of
the higher efficiency of oxygen over atmospheric air as a refining agent, the
recent developments in automatic controls and data processing, and better quality
controls.
e. Steel Processing/Fabrication: After the molten steel is tapped from the
furnace, it is poured into ingot molds mounted on little flat railcars in the pig
casting building (Figure 2-63). Once the ingot is cast it goes through the steps
of stripping, soaking, and rolling (Figure 2-67).
(1)
Major recognition features of a steel forming and finishing plant include:
Stripping area
Building under an overhead or tower crane
Situated on rail network
Soaking pits
Long, low steel-frame structure
Erected across and abutting the mill
Short stacks
Roughing mill
Short, single-story, steel-frame structure
Abuts soaking pots; usually forms a "T" or "L"
Bloom and billet storage area
Rolling and finishing mill
Reheat furnaces with three or four short stacks on or alongside the mill
Long, steel-frame building
Arranged side-by-side or in staggered series.
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