Transactions of the Canadian Institute of Mining and Metallurgy and of the Mining Society of Nova Scotia Volume 9

Transactions of the Canadian Institute of Mining and Metallurgy and of the Mining Society of Nova Scotia Volume 9

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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. 1906 edition. Excerpt: ... class of coal used; but on collieries it will be most generally the class of coal that will give the higher percentage. In actual practice the author has 1200 normal H.P. in boilers, the capacity of which drops 40% when the feed water is reduced from 200F. to the ordinary temperature of cold water. The boilers being fired with fine coal with much dirt in it, at no time give more than three-fourths of their normal power. The questions of firing and draft will require a knowledge of chemistry and ventilation on a rather different scale from that taught in college, but happily the fundamental knowledge gained in college will enable one to shortly and easily acquire the information desired on these points. But they are far too important to be neglected and are growing in importance every day. The proper and systematic handling of coal to the boilers and ashes from the boilers and the drainage of the whole plant, to prevent slush and uncleanliness, will come in for a due share of consideration, as will also the erection of proper buildings to house the boilers, machinery and workmen. As the years go by, more and more attention is paid to washing coal and separating the different sizes; and there are no machines in use from the elementary trough washer, which gives good enough results where refinement is not essential, to the elaborate washery that cost $150,000.00. These latter are usually erected by experts and contracting firms; but as with other things when erected and turned over, the colliery manager bears the responsibility of keeping it going and of its doing satisfactory work. To acquire a good thorough knowledge of washing is not so difficult a matter as many other subjects in colliery management. To be able to design your own washer or...
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Product details

  • Paperback | 114 pages
  • 189 x 246 x 6mm | 218g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236660374
  • 9781236660374