Mining and Scientific Press Volume 112

Mining and Scientific Press Volume 112

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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. 1916 edition. Excerpt: ... reduced from 28 to 12%. Raw concentrate is also smelted, about 85 tons per day.' ' The acid plant has proved itself a success, but leaching of the concentrate has not been started on anything but an experimental scale. The acid production at present is in excess of requirements for the Minerals Separation process. It has been unofficially stated that the mill will be increased to 6000 tons daily capacity and such improvements effected as to increase the monthly output to 2500 short tons of copper; during the last quarter of 1915 the monthly output was at the rate of 1800 tons of metal. The operations of the Chile Copper Co. at Chuquicamata began in May and have been undergoing the usual experiences of a new treatment plant operating under novel conditions. Since August the monthly output has been about 1500 short tons of ingot copper. The deposit is stated to contain over 400,000,000 tons of 2% copper ore, which makes it the premier property of the world as regards tonnage of commercial mineral. All the smelters in the country, with the exception of the Braden plant, are custom plants. These are now increasing their outputs, aided by the high freights on shipments of ore to the United States and England. Freight on bar copper to the United States is 5 per long ton; minerals pay from 4 to 5 per ton, in sacks. Contracts for large tonnage are said to exist at lower figures. There are four active smelters producing bar copper, as follows, in metric tons of fine copper. 1914 1915 Gatico 2388 3000 Catemu 3537 3500 Natalgua 2481 3500 Lota 3503 3948 Includes purchased matte. The first and last are situated on the coast (the Lota smelter is close to the coal mines it controls); the other two are inside from Valparaiso. more

Product details

  • Paperback
  • 189 x 246 x 46mm | 1,610g
  • United States
  • English
  • black & white illustrations
  • 1236958187
  • 9781236958181