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Understanding Coal Ash Quality Parameters (8e4354da-7eb6-471e-9f69-fee718e68d0b)
By E. C. Winegartner, A. A. Ubbens
The company attempting to sell coal to large utility plants is faced with a confusing array of quality parameters and specifications which are often poorly understood by both the utility company and c
Jan 1, 1977
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Cyclical Trends and the Metal Market Outlook
By A. G. B. Hayes, C. L. Renzoni
"AbstractThis paper provides a rough outline of economic expectations for the near future and then goes on to discuss their effect on the expected demand for metals, using zinc, copper, nickel and alu
Jan 1, 1977
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Mineral Indicators - Bituminous Coal And Lignite:
Wildcat strikes in the Appalachian coal fields, primarily in West Virginia, have resulted in an estimated 4.5 million ton loss in coal production during July and through the first week in August. Sinc
Jan 1, 1977
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IC 8749 Analyses Of Natural Gases, 1976 ? Introduction
By B. J. Moore
This publication contains analyses and related source data for 252 natural gas samples from wells and pipelines in 17 States. All of the samples were obtained and analyzed during calendar year 1976 as
Jan 1, 1977
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Evaluation Of Limestone Mining And Marketing Opportunities For Urban Quarries (af81e90e-6f0e-4f4c-98a4-28e746dd2771)
By Marline J. Veesaert
Urban quarries offer one of the greatest opportunities for profit in non-metallic mining with limited financial risk IF properly evaluated, planned and developed to meet market needs. Location, with
Jan 1, 1977
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Potential Application Of Dual-Motor Drives For Large Grinding Mills
By John K. Liu
The trend to larger grinding mills, requiring total drive power in the range of 10,000 KW(13,400 HP) or so provides the incentive for developing new power transmitting techniques, since conventional g
Jan 1, 1977
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Mineral Indicators - Bituminous Coal And Lignite: (dc9eb6a8-3c88-4933-81fe-334238c72f19)
The revised estimate of coal production in January 1977, is 39 million tons -- down 12 mi 11 ion tons compared with production in January of last year, largely as a consequence of the snow storms and
Jan 1, 1977
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Why Did It Fail?
By William E. Robinson
Why did it fail? My first reaction when assigned this topic was to say: because somebody "goofed"--then thank you all for letting me say those few words, then promptly sit down. All of you have been
Jan 1, 1977
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The Inequality of the Distribution of World Mineral Supplies
By G. J. S. Govett
World mineral production is dominated by six countries - the U.S., the U.S.S.R , Canada, South Africa, Australia and China - which also hold most of the reserves of the world?s minerals. For the devel
Jan 1, 1977
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OFR-7-82 Developing A New Method For Roof Support Using Sonic Pin-Setting Machines
By Robert L. Morris
A new concept of roof support by "sonic pin-setting" is introduced. Initial experiments indicate that this method could introduce tremendous benefits for the coal mining industry by making roof-boltin
Jan 1, 1977
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Scrapers Vs Draglines - Production And Present - Worth Cost Analysis
By W. C. Morgan
Recently passed federal strip mining legislation officially emphasizes that the increased coal production required by this country through surface mining is going to be obtained only with stricter env
Jan 1, 1977
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OFR-108-78 Development Of An Improved Methane Sampling System
By Wilbur L. Webb
An electrically powered methane sampling system for application on mining machines was designed, fabricated and laboratory tested. The system will sequentially draw sample air at a controlled rate fro
Jan 1, 1977
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Western Coal Use In Industrial Boilers
By Kenneth L. Maloney
Ten small and intermediate-sized [11 GJ/hr to 264 GJ/hr (10,000 lb/hr steam to 250,000 lb/hr steam)] coal-fired boilers in the upper Midwest have each been tested on both a bituminous eastern coal and
Jan 1, 1977
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Maintenance and Testing of Protective Devices
By W. E. Lockley
This paper will attempt to answer a number of questions which are important to the safe and continued operation of an electric power system. 1. WHY should electrical protective devices be tested? 2.
Jan 1, 1977
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Mineral Indicators - Aluminum: (f9f69cad-787c-44c8-8d38-3c81f9a69249)
Since early July, domestic producer listings in primary aluminum ingot have been at 53¢ per pound. Dealers, however, lowered their August quotes by 1.8¢-2¢ to 47.5¢-48¢ per pound. BITUMINOUS COAL
Jan 1, 1977
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Proposed Coal Pillaring Procedure Using Concrete Containing Coal Refuse (Coal-Crete) (3a32dc52-d669-4346-8678-497add39ba3f)
By Jerry G. Rose
This paper addresses a process by which both the disposal and utilization of preparation plant coal refuse can be simultaneously accomplished with an attendant benefit of significantly increasing the
Jan 1, 1977
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Technical And Economic Aspects Of Surface Coal Mining In The South
By Robert M. Cox
Surface mining of coal in the South developed into a major industry during the 1960's. The economic significance of the industry is much greater than is readily apparent when one considers only t
Jan 1, 1977
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In Situ Leaching Of Copper -An Economic Simulation Approach (f03b625d-56a0-4dc7-9c7f-9baf892094c3)
By A. Aly Selirn
An economic simulation model was developed to predict the amount of copper recovered from copper oxide deposits and the cost of producing it as a function of the deposit parameters. The economic simul
Jan 1, 1977
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An Economic Rationalization Of Coal Preparation Methods And Equipment
By Gerry Norton
The purpose of this paper is to make the most complete assessment of coal cleaning methods, both process and equipment related to modern-day production and environmental requirements. In order to ac
Jan 1, 1977
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Basic Elements In The Economics Of An Open Pit Design
By Guillermo V. Borquez
The economics of open pit mine design are dictated by three basic elements: cut-off grade, stripping ratio and slope angle. Although these elements are functions of a number of independent parameters,
Jan 1, 1977