pa1778data.pdf

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U.S. STEEL DUQUESNE WORKS
HAER No. PA-115
(Page 215)
the Swindell-Dressier Company, each of the top fired furnace pits
are 9'-0" wide x 22'-0" long x 14'-9" deep. Each furnace is
equipped with high velocity multi-directional burners capable of
firing at a maximum rate of 20,000,000 Btu per hour, a combustion
air fan, and metallic radiation recuperators which extend from
the furnace to the outside western wall of the building. A
motor-powered winch driven steel cover for opening and closing
the furnace before and after charging of the ingots is set on top
of each furnace pit. The average capacity of each furnace is 12
ingots. A large control room containing a control panel for each
furnace runs the length of the line of soaking pits and is
located along the western wall of the building.
Two sets of charging and two sets of delivery tracks run
parallel to the pits with crossovers to provide maximum
flexibility in movement within the pit area. Set on top of each
delivery track is a cable-driven remote controlled ingot buggy
which delivered the ingots from the pits to the mill's receiving
table and overhead ingot turner. The charging or outer tracks
(i.e. those furthest from the furnaces), and the delivery tracks
are served by three Alliance E.O.T. cranes. Two of these cranes
have a capacity of 15 tons, while the capacity of the other crane
is 25/15 tons.
c. Mill Section: The mill section is located just
north of the soaking pit section and makes up the northern end of
the building. It is 1720'-0" long. The equipment and structures
contained within the mill building are related to the primary
rolling operation itself.
The machinery associated with primary rolling is laid out
linearly and runs from south to north. First in line are two
ingot receiving tables, each powered by a 50 hp motor. These
tables received ingots from the ingot buggies before delivering
them, one at a time, to the ingot shift table. The shift table
was served by an overhead ingot turner and scale which was
manufactured by the Mesta Machine Company. Only the housing of
the ingot turner and scale, which weighed each ingot and had the
capability of turning it 180 degrees, remains. From the ingot
turner and scale, the ingot was passed to the 46" x 110" blooming
and slabbing mill approach table which, in turn, delivered it to
the mill roll stand. The 46" x 110" 2-high reversing roll stand
was powered by a 5000 hp motor. It was manufactured by the Mesta
Machine Company and is partially dismantled. It consists of an
entry and exit table, the rollers of which were individually
motor driven, and the housing for the rolls. Positioning
sideguards exist both on the entry and exit ends of the roll
stand. Four manipulating fingers are located on the entry end of
the stand. When it was in place, the top roll had a maximum lift