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• operation. U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 193) c. Fume Hoods: A 13*-8" diameter, water cooled, fume hood comprised of a membrane-type construction is located directly above each, furnace. Each hood doglegs upwards to a quencher on the top floor of the building. d. Scrap Charging Track: A wide gauge track runs along the floor on the charging or eastern side of the furnace. The track carried a scrap charging transfer car before scrap charging was accomplished with overhead cranes. e. Lfrtile AflflXtJ-ve Bins: Four 400 cu. ft. capacity ladle additive bins laid out linearly on a north-south axis are suspended from the service floor just south of furnace number two on its tapping or western side. Two of the bins contained ferromanganese, and two contained ferrosilicon. f. Ladle Additive Chutes: A steel framed chute hangs from the floor on the northern and southern side of each furnace at a 45 degree angle. The chutes direct ferromanganese or ferrosilicon into the teeming ladle after the furnace has been tapped. g. Elevator Shaft: One 12'-2" wide x 16*-9" long elevator shaft leading from the ground floor to the roof of the building is located 13'-7" south of furnace number one's main control building on its tapping side. h. Main Office and Chemical Laboratory Building: Located 14'-3" due south of the elevator shaft is a one story, 351-411 wide x 212'-0" long concrete block building. The building houses the BOP shop's main offices, its chemical laboratory, and locker rooms. 3. Service Floor: The 86■-0" wide x 225'-0" long service floor is composed of a steel framed platform 32'-3" above the operating floor. The northern edge of the floor coincides with the northern edge of the operating floor. a. Batching Hoppers: One ll'-9 1/2" top I.D. x 3'-6 5/8" bottom I.D. x 16'-2" high cone shaped batching hopper is suspended from the batching floor just south of the fume hood for each furnace. A gate operated, water cooled flux chute leads from the bottom of each batching hopper at a 40 degree angle through the fume hood into the top opening of each furnace. b. Oxygen Lances: Two oxygen lances per furnace are hung from a lance positioning and hoisting rig assembly extending
U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 194) upwards to the flux storage floor of the building. The lances enter the top opening of each furnace through a collar protected opening on each fume hood. 4. Batching Floor: The 86'-0" wide x 225'-0" long batching floor is located on a steel framed platform 2 0'-3" directly above the service floor. a. Weigh Hoppers: Located in the middle of the floor and laid out linearly on a north-south axis are six weigh hoppers hanging from the weighing floor. They are composed of two 100 cu. ft. capacity spar hoppers, two 100 cu. ft. capacity ore hoppers, and two 600 cu. ft. capacity lime hoppers. Attached to the bottom of each hopper is a Carrier feeder conveyor. b. Scales: Six Rex scales are located directly opposite their respective weigh hoppers on the western side of the floor. c. Main Flux Conveyor Belt: A 30" wide x 95 '-0 M long, 268 ton per hour reversible conveyor belt powered by a 7.5 hp motor is located directly below the feeder conveyors attached to the bottom of each weigh hopper. Laid out on a north-south axis, the main conveyor belt delivers the raw material batches to one of two cross conveyors. d. Cross Conveyor Belt: A 30" wide x 15 f -0" long conveyor belt, running in a easterly direction, is located at the north end of the main conveyor belt. The conveyor is powered by a 5 hp motor. The raw material batches drop onto the cross conveyors from the main belt and are delivered to the top opening of the batching hoppers. 5. Weighing Floor: Located 14'-6" directly above the batching floor, the 86'-0" wide x 225'-0" long weighing floor is made up of a steel framed platform. a. Storage bins: Laid out on a north-south axis, seven storage bins are suspended from the flux storage floor. Two 2750 cu. ft. capacity lime bins, two 1890 cu. ft. capacity spar bins, and two 1800 cu. ft. capacity ore bins are located directly above their respective weigh hoppers on the floor below. A 1750 cu. ft. capacity coke storage bin is located at the southern end of the line. Each of the lime, spar, and ore bins has a Carrier feeder conveyor attached to its bottom opening. The conveyors drop their contents into a chute which leads to the top openings of the weigh hoppers below. b. Oxygen Lance, Fume Hood and Stack Cooling Water
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FART THREE: 1946-1988 U.S. STEEL DU
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Installation Date: 1955. U.S. STEEL
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cooling tower has a capacity of 190
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* * tunnel beneath the clarifier. I
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dumped. Construction Date: 1957. U.
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B. Hoist House,: U.S. STEEL DUQUESN
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