Transactions of the American Institute of Mining, Metallurgical, and Petroleum Engineers Volume 46

Transactions of the American Institute of Mining, Metallurgical, and Petroleum Engineers Volume 46

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ...per minute. This figure is the unit in all subsequent calculations, as it represents the heat loss of all side jackets in the unit or 15-ft. furnace. For the end jackets, we find an average of 11,500 B.t.u. per minute with two jackets, and 23,000 B.t.u. per minute with four jackets, which represents the full end-jacket area of any length of furnace. DATA. Transverse Section: Width between upper jackets, 6 ft. Width at tuyeres, 4 ft. 8 in. Size of Upper Jackets: End, 7 ft. 5 in. by 6 ft. 6 in. Side, 7 ft. 5 in. by 7 ft. 6 in. Size of Lower Jackets: End, 7 ft. 5 in. high, 6 ft. 6 in. wide at top, 5 ft. wide at bottom. Side, 7 ft. 5 in. vertical height, 7 ft. 5.45 in. slant height, 7 ft. 6 in. wide. End jackets overlap side jackets 3 in. on each side. PER CE The second part of the tabulation shows the heat loss of various furnaces, ranging in length from 15 to 120 ft., and including the two Anaconda types. Taking the heating value of blast-furnace coke for December, 1910 (not ash-plant coke) as representing the average of our coke, these figures are converted into pounds of coke per minute. A column is also added showing the pounds of coke per minute equivalent to the heat loss of a number of 15-ft. furnaces whose total hearth area would equal the hearth area of the long, or combined, type. The latter figures are evidently greater than the actual coke equivalent of the heat loss for the combined furnaces and the ratio between the two may be expressed in percentage. This is done in the last column. If we use the term "fuel loss" to mean the pounds of coke required per minute to supply the heat loss through the jackets, it is evident that the fuel loss decreases rapidly between lengths of 15 and 60 ft., and very little beyond more

Product details

  • Paperback | 292 pages
  • 189 x 246 x 15mm | 526g
  • United States
  • English
  • black & white illustrations
  • 1236981367
  • 9781236981363