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• U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 93) 19*-0" high underground concrete basin has a capacity of 110,900 gallons. Two 2400 gpm Wilson-Snyder vertical pumps are located above ground over the hotwell. A 200 hp U. s. Electrical Titan Line motor rated at 1185 rpm powers each pump. Construction and Installation Date: 1980. Q. Non-Evaporative Spray Water Well and Spray Water Pumps: Located adjacent to the gas cooler hotwell on its northern side is the spray water well for the non-evaporative water treatment recycle system. It is composed of 184,000 gallon capacity underground concrete basin measuring 32 , -6" wide x 40 f -0" long x 19t-0" high. Sluice gates divide the basin into three cells, a gas washer spray water cell, a gas cooler spray water cell, and a standby cell. Three 7000 gpm Wilson-Snyder vertical pumps are located above ground over each cell. Each pump is powered by a 150 hp U. S. Electrical Titan Line motor rated at 1180 rpm. Construction and Installation Date: 1980. R. Non-Evaporative Cooling Tower: The cooling tower for the non-evaporative water treatment recycle system is located adjacent to the gas washer hotwell, gas cooler hotwell, and spray water well on their eastern side. Manufactured by Resorcon Inc., it is composed of two wet surface air coolers: one for gas washer water and one for gas cooler water. Each unit is made up of four cells sandwiched between two shell and tube type heat exchangers. The fans at each cell, manufactured by the Tuf-Lite Company, are each powered by a 60 hp Reliance Duty Master motor rated at 890/1775 rpm. The capacity of the gas washer unit is 3000 gpm. The capacity of the gas cooler unit is 2400 gpm. Both units are designed for an inlet temperature of 125 degrees F. and an outlet temperature of 90 degrees F. Installation Date: 1980. S- Dorothy Six Chemical Dispersant Building and Associated Chemical Feed Equipment: Constructed of cinder block and set on a concrete foundation, the 16*-0" wide x 20'-8" long x 10*-8" high chemical dispersant building for the non-evaporative water treatment recycle system is located just north of the gas cooling tower at Dorothy Six. Three chemical storage tanks, two with a capacity of 1000 gallons and one with a capacity of 560 gallons, are located within the building. The chemical feed pumps which were associated with each tank have been removed. Construction and Installation Date: 1979. T. Non-Evaporative control Building and Associated Chemical Storage Tanks: Located just north of the non-evaporative cooling tower, the two story control building is 28*-0" wide x 68'-0" long. Constructed of cinder block, it is set on a concrete foundation. The main control panel for the non-evaporative water
• 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
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