pa1778data.pdf
pa1778data.pdf
pa1778data.pdf
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U.S. STEEL DUQUESNE WORKS<br />
HAER No. PA-115<br />
(Page 57)<br />
provided cooling water to the tuyere coolers and bosh area of<br />
Dorothy Six. Each hearth stave motor/pump assembly consists of a<br />
150 hp, 1770 rpm General Electric Custom 8,000 motor connected to<br />
a model 10 x 12 x 14 1/2 DVC Wilson Snyder pump operating at<br />
3,000 gpm. The hearth stave pump supplied cooling water to the<br />
hearth staves and the cinder notch of Dorothy Six. Stack<br />
motor/pump assembly number one consists of a 100 hp, 1770 rpm<br />
General Electric Induction motor connected to a 8 x 6 Type SH<br />
Allis-Chalmers pump operating at 1500 gpm. Stack motor/pump<br />
assembly number two consists of a 100 hp, 1775 Westinghouse motor<br />
connected to a 8 x 6 Type SH Allis-Chalmers pump operating at<br />
1500 gpm. The strainers include two Type AL 16" Elliott Twin<br />
Strainers, one 16" Hellan automatic self-cleaning strainer, and<br />
one 24" Type 7 Elliott self-cleaning strainer. Service water<br />
drawn from the Monongahela River is passed through the strainers<br />
in order to clean it of debris before it is passed into the pump<br />
suction connections.<br />
Construction of pump house: 1961.<br />
Installation of strainers and motor/pump assemblies: 1961.<br />
H. Strainer Pits and Strainers at Blast Furnaces Number One<br />
and Three: Abutting the center west inside wall of cast houses<br />
numbers one and three is a 4*-7 1/2" wide x 29 , -3" long x 9'-10"<br />
deep strainer pit. Three Type AL 14" Elliott Twin Strainers and<br />
associated water piping are located approximately 2 , -0" above the<br />
pit along the inside wall. The strainers perform the same<br />
function as described in I - G.<br />
Installation of strainers at both furnaces: 1961.<br />
I. Cooling Water Circle Pipes, Cooling Plates. Waste Water<br />
Troughs, Cinder Notch, and Tuyere Coolers at Blast Furnace<br />
Numbers One and Three: Encircling each furnace bosh is a 10"<br />
diameter pipe which supplied cooling water taken from the bosh<br />
pump discharge connection to the bosh and hearth area.<br />
Encircling each furnace stack is a 6" diameter pipe which<br />
supplied cooling water taken from the stack pump discharge<br />
connection to the stack. At the hearth and bosh area the cooling<br />
water was delivered to copper cooling plates. The approximately<br />
6" wide x l'-O" long x l'~0" deep hollowed out cooling plates are<br />
inserted into furnace shell openings all around its<br />
circumference. The cooling plates are connected in series by<br />
flexible hoses running from the 10" diameter circle pipe. Copper<br />
cooling plates inserted into shell openings around the<br />
circumference of each stack are arranged, relative to the 6"<br />
diameter circle pipe, in the same manner as the hearth and bosh<br />
system. A rectangular trough which encircles the bosh above the<br />
10" diameter circle pipe collected the waste water after it had<br />
passed through the cooling plates. The waste water passed from<br />
the trough to two 10" diameter pipe lines leading to a sewer. A