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Proceedings of the Engineering Association of the South Volume 19-21

Proceedings of the Engineering Association of the South Volume 19-21


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...slag--every hour and to tap the iron notch every four hours. At each tap about 55 tons of metal arc drawn off into ladles, which are then taken to the mixer building or to the pig machine. An average charge for a modern furnace per-day is as follows: 1,008 tons ore, 525 tons coke, 140 tons dolomite. This makes, in turn, 328 tons of molten iron and 280 tons of slag. The product of the Ensley furnaces is basic iron entirely. The main reason for this is that it is the iron required by the open-hearth process in the making of the steel rails for which Ensley is famous. Have you ever stopped to think what is required for the smelting of iron ore? Every blast furnace must have its complement of hot-blast stoves, usually four in number, and they will average about 20 feet in diameter by 90 to 100 feet in height. These stoves are no more than huge brick piles arranged so as to allow the circulation of air between the bricks-and having one main chamber apart from the rest for the combustion of cold air and the hot gases from the furnace. Cold air is forced into these stoves by huge blowing engines and under a varying pressure of 18 to 25 and sometimes as high as 30 pounds per square inch. After the air has become sufficiently heated, it is let out through a valve into the hot-blast main, and enters the furnace through the tuyeres, percolating its way through the burden in the furnace and coming out again through the downcomes and dust catchers as gas, and is consumed in the stoves and under the boilers. To run a furnace for twenty-four hours requires about 2,000,000 gallons of water, 5,000 horse power of engines, running on an average of 135 revolutions per minute, with a steam pressure of 125 per square inch, and delivering 54,000 cubic feet of air per minute. The ...


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Product Details
  • ISBN-13: 9781130683882
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 192
  • Spine Width: 10 mm
  • Width: 189 mm
  • ISBN-10: 1130683885
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 354 gr


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