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IC 6769 Manganese Its Occurrence, Milling, and Metallurgy. Part II
By C. G. Maier
The present trend of chemicometallurgical research toward widespread and inclusive use of thermodynamic methods requires the inclusion of available data of this sort in any comprehensive metallurgical
May 1, 1934
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OFR-105(1)-84 Ground And Air Vibrations Caused By Surface Blasting. Volume 1. Executive Summary
Ground and air vibrations induced by large surface blasts have been monitored. These field results, as well as a large number of published results, have been used to assess the performance of existing
Jan 1, 1983
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OFR-105(2)-84 Ground And Air Vibrations Caused By Surface Blasting. Volume 2 Ground Vibration Monitoring And Assessment Of Conventional Predictors
By Sally A. Shoop
Thirty-seven blasts have been monitored using either three or four seismographs, at four coal strip mines and at a limestone quarry. Statistical analysis of the data shows that square-root, cube-root,
Jan 1, 1983
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IC 8517 How To Mine And Prospect For Placer Gold
By J. M. West
Increased leisure time and increased interest in the out-of-doors is leading more and more families to experiment with placer mining of gold, and some- times even to going on into small-scale producti
Jan 1, 1971
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RI 8570 Process for Recovering Chromium and Other Metals From Superalloy Scrap
By J. J. deBarbadillo
This Bureau of Mines report describes a process for recovering chromium and other metals from superalloy scrap. Laboratory-scale experiments were conducted to test a complex flowsheet utilizing a wide
Jan 1, 1981
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IC 6153 Safety In Mines As Affected By First-Aid And Mine-Rescue Contests
By W. D. Ryan
The organic act passed by Congress in 1910 instituting the Bureau of Mines provided that the director of the bureau should promulgate such investigations as might be necessary to determine the causes
Jan 1, 1929
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OFR-83-77 Geophysical Measurement System For Delineation Of Channel Sands
By John C. Cook
Channel sand bodies ("wants" or "cutouts") are deposits of barren, hard sediments which interrupt production and pose safety hazards when encountered in underground coal mining. To locate these costly
Jan 1, 1976
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OFR-55-80 Analysis Of Industry Research And Development Recommendations In Mining And Reclamation Technology
Recommendations from 44 mining industry workshops are summarized and reviewed in the context of Bureau of Mines research and development programs on-going during the period 1974-1977. Approximately 1,
Jan 1, 1979
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RI 6976 Laboratory And Pilot Plant Development Of Flotation Procedures For Fine-Grained Hematitic Ores Of Marquette Range, Michigan
By R. T. Sorensen
Bench-scale and continuous testing were performed to adapt the anionic process for flotation of calcium activated silica to the fine-grained hematitic-goethitic jaspers from the Marquette range, Michi
Jan 1, 1967
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Bulletin 173 Manganese
By Others, C. M. Weld
During the past two years the Bureau of Mines has issued a series of mimeographed reports giving the results of research work and experiments conducted as part of its war minerals investigations. In t
Jan 1, 1920
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OFR-164-77 Conceptual Design And Engineering, Economic And Environmental Analysis Of Surface Pit Slope Caving Mining System
By H. M. Coggin
The study summarizes the state of the art in rock mechanics, open pit and underground mining, leaching, geology, metallurgy and financial analysis Conceptual design of pit slope caving technique and a
Jan 1, 1977
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Bulletin 130 Blast-Furnace Breakouts, Explosions, and Slips, and Methods of Prevention
By F. H. Willcox
This publication is the third of a series of reports on hazards and the prevention of accidents at blast-furnace plants that is being published by the Bureau of Mines, Technical Paper 106a being the f
Jan 1, 1917
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IC 7829 Marble ? Summary
By Oliver Bowles
The Bureau of Mines issued three Information Circulars on marble many years ago (5), (6), (7).2/ They have long been out of print; furthermore, conditions have changed considerably in the industry in
Jan 1, 1958
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RI 6969 Heavy Liquid Cyclone Concentration Of Minerals (In Two Parts) 1. A Study Of Liquid Cyclone Variables Influencing The Concentration Of Minerals
By R. B. Tippin
The heavy liquid separation (HLS) process was investigated by the Bureau of Mines to develop a means of concentrating minerals from natural ores, Various spodumene ores were tested in a 0.4-inch diame
Jan 1, 1967
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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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RI 8977 - Extraction of Chromium From Domestic Chromites by Alkali Fusion
By Gary L. Hundley
The Bureau of Mines has devised a procedure to recover chromium chemicals from low-grade domestic chromites, which contain silicon and aluminum impurity levels that are too high to permit processing b
Jan 1, 1985
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Bulletin 39 The Smoke Problem at Boiler Plants A Preliminary Report
By D. T. Randall
Several years ago investigations were begun by the United States Government to determine the most efficient methods of utilizing the coals of the United States. These investigations, which were contin
Jan 1, 1912
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RI 9199 - Metal Recovery From Secondary Copper Converter Dust by Ammoniacal Carbonate Leaching
By R. C. Gabler
Effective recycling or disposal of flue dusts is a continuing problem, particularly for secondary smelters treating low-grade Cu scrap. The Bureau of Mines investigated a variety of flue dust treatmen
Jan 1, 1988
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RI 9287 - A Simplex-Method-Based Algorithm for Determining the Source Location of Microseismic Events
By Jennifer S. Riefenberg
The U.S. Bureau of Mines conducts basic and applied research related to predicting, eliminating, and/or controlling rock bursts in underground hard-rock mines and coal bumps in underground coal mines.
Jan 1, 1989
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RI 9447 - Estimation of Shear Strength Using Fractals as a Measure of Rock Fracture Roughness (33f8b07f-13e7-4bbf-b561-94dbc05a11c7)
By P. C. McWilliams
Researchers at the U.S. Bureau of Mines investigated the use of close-range photogrammetry and subsequent stereo digitizing to obtain data from rock fracture roughness profiles. The photogrammetric pr
Jan 1, 2010