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Home > Art, Film & Photography > Mechanical Technology; Being a Treatise on the Materials and Preparatory Processes of the Mechanical Industries
Mechanical Technology; Being a Treatise on the Materials and Preparatory Processes of the Mechanical Industries

Mechanical Technology; Being a Treatise on the Materials and Preparatory Processes of the Mechanical Industries


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About the Book

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. 1916 Excerpt: ...for instance, the occurrence of a scaffold, --the whole volume of the blast can be thrown on one side of the cupola by manipulating the valves. The third feature is the firebricklined cylindrical receiver into which the metal is delivered as fast as it comes down, until a quantity has been stored up equal to half the hourly melting capacity of the cupola. The plan commonly adopted when making heavy castings with one cupola of comparatively small size, is to melt one or two tons of metal in the usual way and run it into the ladle. A similar quantity is again allowed to collect in, say half-an-hour's time, and is also tapped into the same ladle as before, the surface of the metal being covered with a layer of charcoal powder to retain the heat and prevent oxidation. This may be repeated with one or more ladles until the required quantity has been obtained. It will be seen that the use of the receiver effects the same object in a much simpler manner. The tapping hole is thus always open, and a circulation of hot air is maintained through an upright ganisterlined pipe at the top to prevent any chilling of the metal. Charging the Cupola.--After closing the drop bottom, the hearth, or sand bottom, of the cupola must be prepared by well ramming a layer, 6 inches thick, of sand from the foundry floor slightly moistened with loam wash. This is effected through the fettling door opposite the spout leading to the receiver. A wood fire is then kindled and covered with coke, air entering through the fettling door until combustion proceeds vigorously, when the door is made up and more coke added from above. When the cupola is thoroughly heated, alternate layers of pig iron and coke are put in through the charging door, and in about two hours' time, the blast is turned on, ...


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Product Details
  • ISBN-13: 9781236196187
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 158
  • Spine Width: 9 mm
  • Width: 189 mm
  • ISBN-10: 123619618X
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 295 gr


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