Download or read book Mining and Engineering Methods and Costs of the Hanover Bessemer Iron Copper Co Fierro N Mexico written by Lloyd M. Kniffin and published by . This book was released on 1930 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper is one of series being prepared by the United States Bureau of Mines on mining methods, practices, and costs in the various mining districts of the United States. It describes the mine of the Hanover Bessemer Iron & Copper Co. at Fierro, Grant County, N.M., which is the only operating iron mine in the southwestern part of the United States. This mine is in a district noted for the great variety of ores that it produces. Within a small area, as shown is Figure 1, there are noteworthy deposits of nearly all the common metals. The ore occurs in lenticular masses dipping at about 50°. An underhand stoping method has been developed that requires but a very small amount of handling of ore. As the ore is very irregular in iron content and also in the distribution of the impurities--chiefly sulphur, silica, and magnesia--a method has to be used that will permit selective mining and will also allow ore and waste to be taken out separately as conditions change. A magnetic cobbing plant raises the grade of the ore shipped about 10 per cent. Nealy all of the iron ore is shipped to Pueble, Colo., a distance of 694 miles, where it is smelted by the Colorado Fuel & Iron Co. The mine is not a large producer, as the long distance from blast furnaces limits its output. In recent years the annual shipments have amounted to about 200,000 tons. The property is noteworthy chiefly on account of this long transportation by rail and the economical methods that have been developed to make the operation profitable. About 175 men are employed.

Download or read book Bulletin written by and published by . This book was released on 1910 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List of Publications written by United States. Bureau of Mines and published by . This book was released on 1932 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey Professional Paper written by Geological Survey (U.S.) and published by . This book was released on 1967 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Ore Deposits of the Bayard Area Central Mining District New Mexico written by Samuel Grossman Lasky and published by . This book was released on 1936 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Geology and Hydrology Southwestern New Mexico written by Ann Finley Wright and published by . This book was released on 1980 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin of the United States Geological Survey written by and published by . This book was released on 1949 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Milling Methods at the Concentrator of the Walker Mining Co Walkermine Calif written by M. R. McKenzie and published by . This book was released on 1932 with total page 1336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describing the milling methods at the Walkermine concentrator, Plumas County, Calif., is one of a series being prepared by the United States Bureau of Mines on milling methods and costs in the various mining districts throughout the United States

Download or read book Mineral Resources of Alaska written by Emma Mertins Thom and published by . This book was released on 1935 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Information Circular written by and published by . This book was released on 1932 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water resources Investigations written by and published by . This book was released on 1980 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sampling and Exploration by Means of Hammer Drills written by John B. Knaebel and published by . This book was released on 1932 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Ore Deposits of the Casto Quadrangle Idaho written by Clyde Polhemus Ross and published by . This book was released on 1934 with total page 1170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology of the Coastal Plain of South Carolina written by Charles Wythe Cooke and published by . This book was released on 1936 with total page 1270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mining Methods and Costs at Tintic Standard Mine Tintic District Utah written by James W. Wade and published by . This book was released on 1930 with total page 1310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metal mining Practice written by Charles Freeman Jackson and published by . This book was released on 1939 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin written by United States. Bureau of Mines and published by . This book was released on 1939 with total page 1292 pages. Available in PDF, EPUB and Kindle. Book excerpt: