Brass-Furnace Practice in the United States

Brass-Furnace Practice in the United States

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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. 1914 edition. Excerpt: ...opportunities of a metallurgical chemist: Metal Ind., vol. 8, 1910, p. 501. cents Jones, J. L., Answer to question on melting: Metal Ind., vol. 11, 1913, p. 437; vol. 12, 1914, p. 81. much less common use in sand-casting shops, may partly account for the generally greater zinc loss from yellow brass in such shops than in the rolling mills, because the pouring temperatlue in the rolling mills is as high or higher than that in the plants maldng sand castings of ordinary thickness. Bassett," on the other hand, states that the use of chlorides as fluxes in melting brass promotes the volatilization of zinc, and cites the almost complete dezincification of thin brass sheets (2.5 mm. thick) annealed at 650 C. for an hour, with driftwood as fuel. Bassett's test shows that flue gases containing the vapor of a chloride such as sodium chloride will aid the volatilization of zinc, but the actual conditions of melting under a molten cover are not strictly comparable to the conditions in the test cited. In several of the plants visited molten covers of salt or glass were used, and the users were strongly of the opinion that such covers reduced the zinc loss. b A molten cover should also tend to make oxidation or other chemical action by the flue gases less rapid, and to prevent the occlusion or solution of gases.. GASES ABBOBBED IN MELTING METAL. The question of the chemical action of various gases and their solution in the alloys melted is one on which little authoritative information is at hand. The gases to be considered are mainly nitrogen, carbon dioxide, carbon monoxide, oxygen, sulphur dioxide, and water vapor. In the melting of the constituents of an alloy a gas may enter into chemical combination with the copper or the other metals in thshow more

Product details

  • Paperback | 128 pages
  • 189 x 246 x 7mm | 240g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236531507
  • 9781236531506