The Mineral Industry, Its Statistics, Technology and Trade Volume 10

The Mineral Industry, Its Statistics, Technology and Trade Volume 10

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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. 1903 edition. Excerpt: ...to save manual labor as much as possible. Philippine Islands.--G. F. Becker has reported the partial development of a lead mine near the town of Cebu, on Cebu Island, and a deposit of ore at Torrijos, Marnidugue Island, showed a value of 96 g. silver, 6 g. gold, and 505-5 kg. lead per metric ton. Production Of Lead In Foreign Countries. Algeria.--The Ai'n Kechera lead and silver mines are being developed, and the concessions asked for by the owners will probably be granted by the Government, as the official engineer has reported favorably. The ore from the mines will be shipped from Callo. Australia.--The Broken Hill Proprietary Co., during the six months ending May 31, 1901, treated 133,862 tons of ore and concentrates for a yield of 26,361 tons lead, 302 tons antimonial lead, 3,240,756 oz. silver, and 1,342 oz. gold. The average results per ton were 19-69% lead, 2421 oz. silver, and 0-01 oz. gold. As regards output, the operations were very successsful, but there was a shrinkage in profit owing to the lower prices ruling in the market for lead and to the increased costs of smelting. Work was begun in January to connect the smelting works with certain iron ore leases in South Australia from which the company intends to derive its supply of flux; the cost of the iron ore consumed in the furnaces has heretofore been an important item in the treatment charges. Extensive development work was carried out in the mine, particularly in lowering the main shafts and opening levels, which added materially to the ore reserves. Experiments with magnetic concentrators were continued; one machine was installed which gave good results, but it is not intended to erect a plant until exhaustive trials have been made. The coke ovens at Bellambi wera put in...show more

Product details

  • Paperback | 434 pages
  • 189 x 246 x 22mm | 771g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236583558
  • 9781236583550