A Manual of Metalallurgy, or Practical Treatise on the Chemistry of the Metals

A Manual of Metalallurgy, or Practical Treatise on the Chemistry of the Metals

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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. 1852 edition. Excerpt: ... parts of the crucible, is at the close of the operation removed by an iron hook to be forged into bars under a heavy hammer. The slag, in proportion as it accumulates in the basin, is let off by the chio or floss-hole, whilst the furnace is constantly supplied with fresh pieces of partially reduced metal. Each lump or bloom thus manufactured requires three and a half hours for its production, and weighs about 4 cwts. To make this, 10 cwts. of ore and 20 cwts. of charcoal are employed. Instead of burning all charcoal, a mixture of that fuel with dried wood is sometimes used, particularly for the first operation, in which the roasting and partial reduction of the ore is effected. The iron prepared in this way is of excellent quality, being extremely soft and malleable; but the product is, in comparison to the quantity of ore and fuel employed, extremely small. The ore which in Corsica is thus treated is a specular oxide of iron, very similar to that so extensively worked in the island of Elba; but although it in reality contains 65 per cent. of metal, 40 per cent. only is obtained by the Corsican process. In some parts of the Continent an apparatus is employed which holds a middle place between the low hearths of Catalonia and Corsica and the high blast furnaces now so generally adopted for the production of iron from its ores. These furnaces, called stiickofen by the Germans, and by the French fourneaux d piece, are, in fact, small cupolas, of which the height does not ordinarily exceed 15 feet, and of which the diameter at the hearth may be about 3 feet. This furnace is usually furnished with but one arch, by which the tuyere is introduced, and the extraction of the bloom effected. The blast is supplied by bellows moved by a waterwheel, and the...show more

Product details

  • Paperback | 244 pages
  • 189 x 246 x 13mm | 440g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236607384
  • 9781236607386