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Electrostatic Separation Of Granular Materials ? Introduction
By F. Fraas
ELECTROSTATIC methods are used to separate and concentrate or purify granular particles derived from ores or various synthetic and agricultural products. Compared with other separation methods that re
Jan 1, 1962
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RI 9106 - An Investigation of Crack Propagation With a Wedge Indenter To Improve Rock Fragmentation Efficiency
By D. A. Larson
The Bureau of Mines conducted basic experiments to study the process of crack propagation with a wedge indenter. The work was conducted under plane stress conditions in a hard, brittle limestone. The
Jan 1, 1987
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Second Quarter National Economic Statistics, Industry Statistics - Second-Quarter National Economic Statistics
By Keith Harris
The U.S. economy grew moderately in the second quarter of 1985 with real gross national product (GNP) recording a seasonally adjusted annual growth rate of 2.0%, up from the 0.3% growth of the previou
Jan 1, 1985
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OFR-37-85 Analysis Of Recharge To An Underground Lead-Zinc Mine, Coeur D'Alene Mining District, Idaho
By Joel A. Hunt
The Bunker Hill Mine, located in north Idaho, consists of over 150 miles of passageways within highly fractured and faulted Precambrian metamorphosed rocks. The Bunker Hill Mine was at one time a majo
Jan 1, 1984
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Bulletin 204 Underground Ventilation at Butte
By Daniel Harrington
For several years the United States Bureau of Mines has been making a study of ventilation in metal mines, this study covering practically all the important mining districts of the country. One of the
Jan 1, 1923
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IC 7360 Cement In Latin America ? Introduction
By Oliver Bowles
In 1940 the Bureau of Mines issued a report describing all the cement plants of Latin America, their design, capacity, and output, and the cement imports, exports, and requirements of the several coun
Jan 1, 1946
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IC 7683 Hydraulic Air Compressors ? Introduction
By Leroy E. Schulze
A review of development and a reevaluation of uses of the hydraulic air compressor are suggested by the constant changes in technology, which frequently make an old art valuable in solving current pro
Jan 1, 1954
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Commodity Data Summaries 1974 - Appendix I To Mining And Minerals Policy ? Aluminum
1. Domestic Production and Use: Twelve companies operated 31 primary aluminum reduction plants, three firms accounting for 66% of production. Washington, Oregon, and Montana accounted for 32% of the t
Jan 1, 1974
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RI 6741 The Mass Spectra And Correlations With Structure For 2-t-Butyl-, 3-t-Butyl-, 2,5-di-t-Butyl-, And 2,4-di-t-Butylthiophenes
By Norman G. Foster
The mass spectra of four tertiary butyl substituted thiophenes are reported. A comparison and contrast with earlier structure correlations made by API-RP48 mass spectroscopists is presented. The fragm
Jan 1, 1966
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Mineral Indicators - Aluminum (3c9a6c0f-f8d7-4a06-8832-e98398516b54)
Workers at the Consolidated Aluminum Corp. primary aluminum smelter at Lake Charles, LA walked out at midnight March 31 when their contract expired. Management personnel operated the smelter and preba
Jan 1, 1979
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IC 8947 Safety In The Use And Maintenance Of Large Mobile Surface Mining Equipment - Proceedings: Bureau Of Mines Technology Transfer Seminars, Tucson, AZ, Aug 16, 1983, Denver, CO, Aug 18, 1983, And St. Louis, MO, Aug 23, 1983
These proceedings consist of papers presented at Bureau of Mines Technology Transfer Seminars in August 1983 for the purpose of disseminating recent advances in mining technology in the area of large
Jan 1, 1983
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Bulletin 241 Coal Mine Fatalities - Accidents in the U.S., 1923
By William W. Adams
Reports for the calendar year 1923 that have been transmitted to the Bureau of Mines of the Department of the Interior by mine officials of the various coal-producing States show that accidents in and
Jan 1, 1923
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Bulletin 135 Combustion of Coal and Design of Furnaces
By Henry Kreisinger, F. K. Ovrrz, C. E. Augustine
The Bureau of Mines is conducting investigations to determine how fuels belonging to or for the use of the United States Govern- ment can be utilized with greater efficiency. As a result of these inve
Jan 1, 1917
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Coal-Mine Accidents In The United States 1939 - Introduction
By W. W. Adams
Coal mining in the United States established a good safety record in 1939. The death and injury rates per man-hour of exposure to risk were favorable compared with most previous years, and the number
Jan 1, 1942
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IC 7315 A Pattern For Western Steel Production ? Introduction
By H. Foster Bain
The war has brought about many changes in the Western States, and some have deep pr sent or potent al economic significance. The West has been feeling severe growing pains for a number of years. Espec
Jan 1, 1945
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IC 7594 The Synthesis Of Hydrocarbons (Report Of The Imperial Fuel Research Institute Of Japan, July 25, 1935) ? Introduction
By Shigeru Tsutsumi
The rapid development of transportation facilities in Japan focused the attention of this country on the possibility of converting the existing coal resources (of which there was an abundance) into li
Jan 1, 1951
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Mineral Commodity Summaries 1984 - An Up-To-Date Summary Of 87 Nonfuel Mineral Commodities ? Aluminum
1. Domestic Production and Use: In 1983, 12 companies operated 27 primary aluminum reduction plants, with 4 firms accounting for 65% of production. Washington, Oregon, and Montana accounted for 35% of
Jan 1, 1984
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Mineral Indicators - Aluminum (See Also Missouri)
Dry weather since the third week in January has set back any prospects for an early increase in hydroelectric power in the Pacific Northwest, according to The Bonneville Power Administration. The 25%
Jan 1, 1980
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Mineral Commodity Summaries 1993 - Significant Events In 1992 - U.S. Mineral And Material Industry
The mineral Industry, following the economy as a whole, experienced little growth in 1992. However, with modernized plants, efficient workforces, and lower operating costs, the industry is well positi
Jan 1, 1993
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IC 6821 Tungsten - Part I ? Introduction
By William O. Vanderburg
[This circular is one of two papers on the tungsten industry in the United States end contains general information on the subject. The second paper which will be issued in the near future deals with t
Jan 1, 1935