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VII. Iron Purification and Delivery Facilities: U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 65) A. Calcium Carbide Silo and Dispensers: The 220-ton calcium carbide silo sits on a concrete pad located near the shoreline of the Monongahela River, just east of the iron de-sulfurization building. Located directly below the 20*-0" diameter x 35'-0" high silo are two 4'-6" diameter x 12'-0" high dispenser tanks which are connected to it by means of a 8" diameter pipeline. A 2" diameter pipeline leads from the 3.3-ton dispensers to a flexible connection at the lance car assemblies on the second floor of the iron desulfurization building. The silo and dispenser arrangement was designed and manufactured by Canadian Met-Chem Consultants, Limited of Montreal, Quebec. Installation date: 1980. B. Iron Desulfurization Building: The iron desulfurization building is located between the calcium carbide silo and the new ladle house. Built by the American Bridge Company, the two story building is 32'-0" wide x 112'-0" long x 49'-3" to the bottom chord of the craneway. A 2-ton service crane rests on the craneway. A concrete foundation supports the building*s steel framework. Its slightly gabled roof is supported by wide-flange I-beams. The exterior of the building is made up of corrugated metal sheeting on its roof and sides. Four ventilation ducts protrude up through the roof. A 17'-0" wide x 17'-2" high opening exists at both ends of the building. Running through the openings is a standard gauge railroad track from which 175-ton "submarine" ladle cars entered and exited the building by means of a Stephens-Adamson car puller located outside of its eastern wall. A fume hood, located near each end of the building, protrudes downwards through the first floor ceiling. Each hood is connected to a 38" diameter duct which rises up the western inside wall of the second story before exiting through the wall into a bag house which is attached to the outside western wall at an inlet elevation of 21'-0" above grade. The bag house consists of three dust collectors connected at their bottom openings by a screw conveyor leading to a swivel chute. A 4'-6" diameter x 70*-0" high stack is located just outside the building's western wall at its northern end. A lance transfer car complete with its lance is located near each end of the building on the second floor. Each transfer car sits upon a standard gauge track which is positioned directly above the track on the first floor. Their lances are connected to 2" diameter pipe leading from the calcium carbide dispenser by a flexible connection. An approximately 8 1 - 0" wide x 25'-0" long x 10'-0" high control room sits directly on top of an electrical room of the same size along the inside western wall of the second floor. All equipment within the
U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 66) building was designed and manufactured by Canadian Met-Chem Consultants Limited of Montreal, Quebec. Construction date: 1980. C. Hot Metal Track: The track running through the iron desulfurization building becomes a hot metal track leading to the basic oxygen steelmaking shop after it leaves the building. Installation date: 1980. VIII. Ferromanaanese Preparation, Storage, and Delivery Facilities: A. Primary Ferromanaanese Crushing and Conveying Line: Travelling in a west to east direction, the primary ferromanganese crushing and conveying line is located 27 0'-0" north of the ferromanganese car preparation building. The line consists of a 7'-0" high steel framed platform straddling a standard gauge railroad track at its far western end; a motor driven 36" x 15'-3" Pioneer Oro Feeder leading to a 24" x 36" Pioneer Jaw Crusher driven by a 150 hp motor capable of crushing 125 tons per hour; and a 30" x 46 , -0" motor driven conveyor belt extending from just below the jaw crusher and rising at a slope of 10 degrees. Installation date: 1965. B. Secondary Ferromanaanese Crushing and Conveying Line: The secondary ferromanganese crushing and conveying line is laid out parallel to and 19'-0" south of the primary line. It consists of a T'-O" high steel framed platform straddling a standard gauge railroad track at its far western end; a 25 hp motor driven 3 6" x 12'-3" Pioneer Oro Feeder leading to a 125 ton per hour 150 hp motor driven 24" x 3 6" Pioneer Jaw Crusher; and a steel framed 3 0" x 50'-0" motor driven conveyor belt extending from just below the conveyor belt and rising at a slope of 10 degrees. Installation date: 1955. C. Crushing and Screening Control House: An approximately 8'- 0" square x s'-O" high corrugated metal control house sits on a raised platform between the primary and secondary crusher. Construction date: 1965. D. Ferromanganese Conveying, Screening, Storage, and Delivery Itine.: The 250'-0" long ferromanganese conveying, screening, and storage line is laid out perpendicular to the primary and secondary lines at their eastern end and travels southward to within 20*-0" of the ferromanganese car preparation building's north wall. It consists of a steel framed 30" x 250'-0" motor driven conveyor belt extending from below the primary and secondary line which rises at a slope of 10 degrees; a three grid
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