Transactions of the American Institute of Mining, Metallurgical, and Petroleum Engineers Volume 43

Transactions of the American Institute of Mining, Metallurgical, and Petroleum Engineers Volume 43

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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. 1913 edition. Excerpt: ...crude material in the active sintering-zone. The rectangle represents a vertical cross-section through the pallets over the wind-box. The sintcr and ore-mixture are seen to be separated by an imaginary line beginning and ending at two respective zero-points. This is about the state in case of sintering any material. When high-carbon materials are sintering, the combustion of the carbon proceeds downward, progressively. Should high carbon follow low carbon directly, the only adjustment necessary is to slow down the speed of the pallets, allowing greater time for burning out the excess of carbon. The only condition under which residual carbon is left in the sinter is when the temperature of the sinter in the upper part of the bed is raised, so as to render it incipiently fluid, and permit it to envelop small amounts of carbon. This only occurs when the carbon is excessively high, say, above 20 per cent. In Mr. Gayley's article,3 the tests showing the extent of desulphurization in sintering were noted. These were all made upon small samples, and belonged to the first trial of a particular material. There have been practically no high-sulphur materials treated which were not brought down as low in sulphur as the best Lake ores. No special adjustment or preparation of the ores is necessary to effect desulphurization; the sulphur is eliminated simultaneously with the sintering. The desulphurization is not dependent upon the form or quality of the ore. Pyrites cinder has been brought down from 4.41 to 0.07 per cent., while magnetites have been lowered in sulphur from 3.50 to 0.15 per cent. An analogy between the sinter made by the Dwight & Lloyd process and that of mill-cinder has been suggested. No such comparison is practicable. The...show more

Product details

  • Paperback
  • 189 x 246 x 15mm | 503g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123683111X
  • 9781236831118