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RI 5954 Low-Temperature Heat Capacities And Entropies At 298.15° K. Of Three Calcium Vanadates ? Introduction And Summary
By E. G. King
An earlier Bureau of Mines report4 provided low-temperature heat-capacity and entropy data for three sodium vanadates. This report continues the study of vanadates by presenting analogous data for thr
Jan 1, 1961
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RI 3016 The Lower Limits of Inflammability of Natural Gas-Air Mixtures in a Large Gallery
By J. E. Crawshaw
"The few previous observations of the effect of turbulence on limits of inflammability have been made on a small scale in turbulence produced either by a fan or by movement of the mixture.By a suitabl
Jul 1, 1930
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OFR-23-79 Study Of Methods To Improve Pillar Extraction Practices In Underground Coal Mines - Volume 1 - Pillar Safety And Production Practices - I. Introduction
The following pages discuss the objectives, the background, the scope and a statement of the problem of the study of methods to improve the pillar extraction practices in underground coal mines. 1
Jan 1, 1975
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RI 5099 Nickel-Cobalt Resources Of Cuba ? Summary
By W. D. Mcmillan
Important reserves of nickel ore occur in the Levies district in Oriente, Cuba. The area is mountainous and mostly covered by heavy vegetation. The ore bodies comprise surface tracts of nickeliferous
Jan 1, 1955
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Case History Of The Response Of A Longwall Entry Subjected To Concentrated Horizontal Stress
By D. Oyler
The National Institute for Occupational Safety and Health (NIOSH) Pittsburgh Research Laboratory (PRL), RAG Pennsylvania and Strata Control Technologies of Australia collaborated in an intensive study
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RI 3967 Exploration of Sedanka Zinc Deposit Sedanka Island, Alaska
By F. A. Rutledge, B. S. Webber, J. M. Moss
"INTRODUCTION The United States, with its vast resources of relatively low-grade zinc been the world's leading producer of zinc -metal for many years. The expanded zinc production during the period, 1
Nov 1, 1946
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OFR-201-83 Evaluation Of Longwall Dust Sources
By Jonathan Ludlow
This document is the final report of a study aimed at defining the relative contributions of various sources of respirable airborne dust on longwall faces. In order to define the contribution of vario
Jan 1, 1983
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Abrasive Materials (MATERIALS MINERALS YEARBOOK-1966)
By Paul M. Ambrose
Overall the domestic abrasives industry had one of its best years in 1965. Production and value of all commodities increased over that of 1964 which also was a good year. Production of tripoli that wa
Jan 1, 1966
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IC 8829 Review Of Horizontal Drilling Technology For Methane Drainage From U. S. Coalbeds (b0741061-c213-4132-a7a5-c9bb7f5405e8)
By Gerald L. Finlinger
This Bureau of Mines publication reviews underground methane drainage programs being conducted in various coalbeds. Equipment used in drainage programs such as drills, underground pipelines, and metha
Jan 1, 1980
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IC 8900 Future Trends And Prospects For The Australian Mineral Processing Sector
By L. Nahai
An important objective of the Australian Government's policies on resources development is to encourage further processing of raw materials domestically, to the extent that this is economically f
Jan 1, 1982
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IC 7266 Graphite - Natural And Manufactured ? Introduction
By G. Richards Gwinn
The mineral graphite, a form of carbon, has been known for hundreds of years, and, was first used commercially as a coloring agent. Its true identity, however, was not recognized until the end of the
Jan 1, 1943
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RI 4515 Titanium Minerals In Central And Northeastern Florida
By J. R. Thoenen
Occurrences of titanium, zircon, and other heavy minerals are widespread in Florida. Deposits concentrated as "heavy sands" by wave and wind action have been mined an or near Atlantic coastal beaches
Jan 1, 1949
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IC 6905 Gold Mining And Milling In The Black Canyon Area, Yavapai County, Ariz. - Introduction
By Jos. R. Guiteras
This paper has been written to describe briefly the mining and milling of gold and silver ores in the Black Canyon and neighboring mining districts in Yavapai County, Ariz. The description of present
Jan 1, 1936
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OFR-14-90 Source And Bedrock Distribution Of Gold And Platinum-Group Metals In The Slate Creek Area, Northern Chistochina Mining District, East-Central Alaska
By Jaffrey Y. Foley
Placer gold and platinum-group metals (PGM) In the Slate Creek area, northern Chistochina Mining District, are derived from silicified and carbonate-altered, Cretaceous-Tertiary (?) dikes and related
Jan 1, 1990
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RI 6014 Composition And Mechanical Properties Of Selected Cold-Mold And Skull-Cast Titanium Alloys ? Summary
By E. D. Calvert
The objective of this research was to examine variations in melting and forging practice for four titanium-base alloys and to determine their effect on the resultant product. Of particular interest wa
Jan 1, 1962
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RI 8489 Recycling Spent Chrome Refractories From Steelmaking Furnaces
In Bureau of Mines research on recycling chrome refractory wastes, used refractories from argon-oxygen decarburization and electric steelmaking furnaces were beneficiated, concentrates were reformed i
Jan 1, 1980
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RI 6000 The Suspended Specimen Method For Determining The Rate Of Steam-Carbon Reaction ? Summary
By W. T. Abel
The rate of the steam-carbon reaction, which is of fundamental importance to coal gasification, was determined by passing steam over graphite specimens suspended in an electrically heated tube. The me
Jan 1, 1962
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IC 9284 User's Manual For The U.S. Bureau Of Mines In Situ Copper Oxide Mining Cost Model
By Joseph M. Pugliese
The U.S. Bureau of Mines has produced a generic in situ copper mine design manual, which contains a computerized cost model for in situ copper oxide mining. The model specifies (1) site-specific param
Jan 1, 1991
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IC 6653 Mining Statutes of the State of Pennsylvania
By J. A. HUFF, V. V. BAKER
This circular is intended to present in brief form the statutory provisions of Pennsylvania regarding mining operations, in force at the end of the 1931 session of the legislature. lo reference is mad
Nov 1, 1932
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Computerized System For Quantitative X-Ray Diffraction Analysis Of Pyrite In Coal
By R. R. Schehl
The Bureau of Mines has developed a quantitative Analysis for pyrite in coal by X-ray diffraction that can be accomplished in little more than 1 hour. To minimize the sample analysis time, data proces
Jan 1, 1973