The Mineral Industry Volume 27

The Mineral Industry Volume 27

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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. 1919 edition. Excerpt: ...year 1918 the Northwest Magnesite Co. produced 80,432 tons of crude magnesite, which was chiefly manufactured into a dead-burned sintered magnesite used by the steel trade for refractories. About $700,000 was spent in erecting a reduction plant at Chewelah, Wash., which has a capacity of making about 10,000 tons of dead-burned magnesite per month. This plant consists of six rotary kilns, 125 by 7li ft., the necessary grinding machinery, etc. At the mine development work was carried on, which proved sufficient ore to supply the requirements of the United States for many years. This ore is of the crystalline form and similar to the deposits in Austria. Whether fhis property can operate successfully after the war will probably be dependent upon the attitude of the Government regarding a tariff on this material, as the freight rate from Washington State to the eastern seaboard is at present $16.50, as compared with the pre-war Austrian ocean rate of $2.00 per ton. The American Mineral Production Co. is another large producer, and could produce 10,000 tons of crude ore per month. The company has shipped several thousand tons per month from Valley to Irvin, 8 miles east of Spokane, where it is converted into ferro-magnesite at the plant of the International Portland Cement Co. The Valley Magnesite Co. operated deposits near Valley, Wash., a portion of the year. STATISTICS OF CRUDE MAGNESITE IN THE UNITED STATES (Tons of 2000 lb.) Foreign Countries Canada.--Production of magnesite in Canada fell to 39,365 short tons in 1918, as compared with 58,090 in 1917. Due to the high prices which prevailed, the value ef the output was considerably greater. The official valuation of the 1917 production was $728,275 as compared with $1,016,765 for more

Product details

  • Paperback | 374 pages
  • 189 x 246 x 20mm | 667g
  • United States
  • English
  • black & white illustrations
  • 1236762967
  • 9781236762962