pa1778data.pdf

•
U.S. STEEL DUQUESNE WORKS
HAER No. PA-115
(Page 94)
treatment recycle system is located on the first floor at the
southern end of the building. The northern end of the building's
first floor is occupied by electrical circuit breakers. Located
directly above the main control panel on the second floor of the
building is the metering equipment for the system's make-up and
blow-down water pipelines. An 8*-0" diameter x 12 f -0" high 4500
gallon capacity carbon steel sodium hydroxide tank, manufactured
by Sharpsville Steel Fabricators, is located on the second floor
of the building just north of the make-up and blow-down metering
equipment. Located at the base of the tank are two small sodium
hydroxide feed pumps which are each powered by a 1/2 hp General
Electric Statotrol motor rated at 1735 rpm. Located just east of
the control building near its centerline is a 5'-4" diameter x
12 f -0" high corrosion inhibitor storage tank. At the base of the
2000 gallon capacity carbon steel tank are three 1.4 gph feed
pumps which are each powered by 1/2 hp motor rated at 1725 rpm.
Also just east of the control building at its southern end is a
560 gallon capacity stainless steel scale inhibitor storage tank.
Located at the base of the 4'-0" diameter x 5'-0" tank are three
1.4 gph feed pumps, each powered by a 1/2 hp motor rated at 1725
rpm. Construction and Installation Date: 1980.
IV. Hot Blast Air Facilities:
A. Hot Blast Stoves at Blast Furnace Number One: Four 21'-0"
diameter x 84'-0" high hot blast stoves are laid out linearly
just south of blast furnace number one. Each stove is equipped
with a chimney stack extending from the top of the stove's dome,
a 28" diameter cold blast air connection, a 32" inside diameter
refractory brick lined hot blast air connection, and a 33" inside
diameter refractory brick lined burner connection. An 18"
diameter pipeline, complete with valving, runs from the cold
blast main to the each stove's hot blast connection. Cold blast
air was mixed with the hot blast air through this line in order
to equalize the temperature of the hot blast while the stove
provided combustion air to the furnace. The 12,000 scfm capacity
burner and motor powered combustion air fan located at the burner
connection of each stove was designed by Arthur G. McKee and Sons
Inc. All connections between the stoves and blast furnace number
one have been severed.
Installation Date of Stoves: 1901.
Installation Date of Burners and Combustion Air Fans: 1956.
B. Hot Blast Stoves at the Remains of Blast Furnace Number
X&o_: Laid out linearly just north of the remains of blast furnace
number two are four 21'-0" diameter x 96'-0" high Diehl Central
Draft hot blast stoves. Built by the Riter-Conley Company, each
stove has a total heating surface of 56,750 sq. ft. Each stove