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U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 22 5) operator also controlled the removable stop, the steam driven pusher, and the car pusher which spaced and shifted the rail cars in front of the loading chute opposite the loading table. The 14" continuous billet mill consisted of 10 roll stands connected by a single drive shaft to a 44" x 78" x 60" Corliss vertical compound condensing steam engine with a rated 3 500 hp. Between the entry table of the mill and the first stand of rolls, there existed a set of hydraulic shears through which all blooms for the 14" continuous mill passed. They were used to cut crops from the front end of the bloom so that it would enter stand No. 1 easily. Each of the blooms to be rolled entered the first stand and travelled in a straight line through the last stand of the mill where it was reduced to a billet ranging in size from 3" to 1 1/2" square. Only one pass was made through each stand of rolls. Because the speed of travel of the bloom and hence the speed of the rolls increased at each succeeding stand, the roll housings were spaced at increasingly closer intervals so as to prevent the material from buckling as it was being rolled. After the billet had passed through roll stand No. 10 it was delivered to the steam driven flying shears where it was cut into specified lengths. From the flying shears the billets passed to the skew-roll assembly table where all of the billets from one ingot lined themselves up side by side. A pusher subsequently delivered the entire group of billets onto one of four hot beds which were located at right angles to the skew-roll gathering table. Stream driven pushers slowly moved the billets across the slightly sloping 31' wide x 53'-6" long hot bed until the cooled billets were conveyed over its end into rail cars that were located in the shipping yard just below the hot bed level. From the shipping yard, the billets were delivered to an inspection station where they were examined for surface defects. Those found defective were shipped to a conditioning area where the defect was removed by means of hand chipping, grinding, or scarfing. 3 The equipment described above was installed at the Duquesne Works in the late nineteenth and early twentieth centuries and served the primary rolling needs of the mill until 1959. In that year the new primary rolling mill, explained above in the description section, was constructed and the old facilities were dismantled. 4 ENDNOTES: l.J. M. Camp & C. B. Francis, The Making, Shaping, and Treating of Steel, Fourth Edition, (Pittsburgh: 1925): 435.
U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 22 6) 2."New Works of the Allegheny Bessemer Steel Company," American Manufacturer 44 (January 25, 1889): 467; Carnegie Steel Company, "Duquesne Works: Plant Description Book," (Duquesne, 1925), 72, 75, 76, 84 & 85; "The Duquesne Works of the Carnegie Steel Company - I," The Iron Age 71 (January 1, 1903): 12 - 20. 3.Camp & Francis, The Makingf 484-93, 516-24; "The Duquesne Works of the Carnegie Steel Company - I," 19 - 20; Carnegie- Illinois Steel Corporation, Steel Plant Design: Rolling Mills. Vol. Ill, (Pittsburgh: 1945): LI - L25. 4."New Primary Mills at the Duquesne Works, United States Steel Corporation," Iron and Steel Engineer 40 (June 1963): 80- 86.
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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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