pa1778data.pdf

•
U.S. STEEL DUQUESNE WORKS
HAER No. PA-115
(Page 115)
conveyor belt number one through a 7*-0" square concrete tunnel
for a distance of 59'-0" at an angle of 12 degrees. The belt is
48" wide, 15/32" thick and 283'-9 3/8" long. It runs at a speed
of 550 feet per minute and has a capacity of 3500 tons per hour
at 13 5 pounds per cubic feet of ore. Located at the northern end
of the conveyor belt is its motor, gear reducer, and drive shaft
assembly. The motor is a 30 hp Westinghouse A.C. motor which
runs at 1500 rpm. The Jones-Herringbone gear reducer has a ratio
of 23.6 to 1.
3. Conveyor Belt Number Three: Extending from the northern
end of conveyor belt number two, conveyor belt number three rests
on a steel frame approximately 3 f -0" above the trestle. The belt
is 48" wide, 5/16" thick, and 1261'-4 3/4" long. It was
manufactured by the U.S. Rubber Company and runs at a speed of
550 feet per minute with a capacity of 3500 tons per hour at 135
pounds per cubic feet of ore. Located at the northern end of the
conveyor belt, along the western wall of the stockhouse is its
motor, gear reducer, and drive shaft assembly. The motor is a
500 hp Westinghouse A.C. motor which runs at 1200 rpm. The
Philadelphia gear reducer has a ratio of 30 to 1.
4. Conveyor Belt Number Four: Conveyor belt number four
rests on a steel frame approximately 3'-0" above the trestle and
extends from the northern end of conveyor belt number three. The
belt was manufactured by the U.S. Rubber Company. It is 48"
wide, 5/16" thick, and 1135'-11 3/8" long. It runs at a speed of
550 feet per minute and has a capacity of 3500 tons per hour at
13 5 pounds per cubic feet of ore. The belt ends at a drive house
which is located at the northern end of the ore yard. Inside of
the drive house is the belt's motor, gear reducer and drive shaft
assembly. The motor is a 3 00 hp Westinghouse A.C. motor which
runs at 1200 rpm. The Jones-Herringbone gear reducer has a ratio
of 24.1 to 1.
5. Drive House for Conveyor Belt Number Four: The drive
house, built by the American Bridge Company, is a 14*-0" wide x
27»-e" long x 24*-0" high steel framed building with a stainless
steel sheeting exterior. Its stainless steel exterior gable roof
is supported by King Post trusswork. Welded to the trusswork
along its centerline and extending the entire length of the
building is a geared monorail for a 5-ton chain hoist.
Construction Date: 1957.
F. Tripper Number One: Manufactured by the Link Belt Company,
tripper number one diverts ore traveling on conveyor belt number
three into either the ore yard or into ore bins hung from the
trestle above the stockhouse by means of a feeder conveyor and
chutes. Each feeder conveyor is powered by one of two 3 0 hp