The Mineral Industry, Its Statistics, Technology and Trade Volume 22

The Mineral Industry, Its Statistics, Technology and Trade Volume 22

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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. 1914 edition. Excerpt: ...MANGANESE By James Aston While manganese exists in nature as part of very many minerals, and is a relatively widespread element, the limited demand and the abundant supply to draw upon, means a market for ores only of the better quality. Manganiferous iron ores are mined in large quantities in the Lake Superior district, and in lesser amount in Colorado, but the product of the smelting operation is a rather high manganese pig iron (1 to 4 per cent. Mn), and the above ores, therefore, should not be regarded as a source of manganese or manganese alloys. The straight manganese ores, on the other hand, although deposits occur in many parts of the United States, have a very limited and relatively unimportant production. Virginia produces practically all of the few thousand tons of annual output. The chief domestic source of ferro-manganese, in which form manganese has its principal commercial outlet, is the franklinite ore of New Jersey. This material is first treated for the recovery of zinc, and the residue, containing about 12 per cent, manganese and 40 per cent, iron, is smelted to spiegeleisen. The chief production of ferro-manganese in this country is, however, from imported ores. The total ore production of the United States is shown in the following table: PRODUCTION OF MANGANESE ORES IN THE UNITED STATES, (a) (Tons of 2240 lb.) (a) Statistics of 1900-1906 are by the U. S. Geologioal Survey. (6) Includes 1300tons of manganiferous iron ore from Vermont, (c) As reported by Virginia Geological Survey, (d) As reported by U. S. Geological Survey. () Estimated, (f) Figures not available, (a) Includes Tennessee and California. Domestic production of ferro-manganese, as reported by the American Iron and Steel Institute, was 119,496 long...show more

Product details

  • Paperback | 394 pages
  • 189 x 246 x 21mm | 703g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236752864
  • 9781236752864