Industrial Management; The Engineering Magazine Volume 24

Industrial Management; The Engineering Magazine Volume 24

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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. 1903 edition. Excerpt: ... or more commonly ship the product to leadsmelting works. Lead and lead-silver mines nowadays nearly always ship their ore to a central smelting center, to works operated under separate ownership, since the railroads have been pushed to almost all productive districts; sometimes they have concentrators on the spot. The ore shipped is sold outright on sample. The large copper mines have their own reduction plant at a convenient location within a reasonable railroad hauling distance and under the same general management. The tendency in the United States has drifted constantly toward separating the mining from the reduction works, it having been found often cheaper to transport the ore even a long way (hundreds of miles in some cases) to points where it can be worked to best advantage, thus saving first cost of reduction plant to the mining company. This policy has to a large extent relieved the mine superintendent from the necessity of supervising the metallurgical work, it being possible in the case of many precious-metal, nearly all lead-silver. and practically all plain lead and zinc mines, to dispose of the product by shipping as run-of-mine, or after hand sorting or with a concentration treatment at the mines which does not make large demands upon the manager's attention. In the case of iron mines, even when owned by the iron and steel companies which turn out the finished product, the mine superintendent is always free from responsibility as to the smelters. Still another factor is the location of a mine. If isolated, far from supplies, means of repair, local skilled labor, and with poor transpor tation facilities, the manager will often be left to his own resources and. to save time must be ready with expedients in emergencies. If...
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Product details

  • Paperback | 404 pages
  • 189 x 246 x 21mm | 717g
  • United States
  • English
  • black & white illustrations
  • 123687224X
  • 9781236872241