What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
acid ACRES addition advance alumina annual average Bureau of Mines capacity capital cost Center clay coal coal mines concentration containing continued conveyor copper crystallization deposits determined developed direct distribution dried drilling dust effect Electric energy equipment Estimated evaluation extraction face feet FIGURE fixed flow fuel function hydrochloric inches increased indicated industry input installed iron labor land utilized leaching lead lignite load longwall maintenance material measured mechanical method mill million mineral moisture Natural operating cost PARAMETER percent plant pound present pressure production pumped range reclaimed removal requirements Research resource road rock roof safety samples shown shows solution sulfur supplies surface TABLE temperature tests tion tons Total transportation underground United utilized waste zinc
Page 2 - ... the amount of heat necessary to raise the temperature of 1 pound of water 1 degree Fahrenheit.
Page 48 - Technology and use of lignite proceedings [Bureau of Mines-University of North Dakota symposium, Grand Forks, N.
Page 189 - ... vitally important energy challenge. If present trends continue unchecked, we could face a genuine energy crisis. But that crisis can and should be averted, for we have the capacity and the resources to meet our energy needs if only we take the proper steps — and take them now. More than half the world's total reserves of coal are located within the United States. This resource alone would be enough to provide for our energy needs for well over a century. We have potential resources of billions...
Page 228 - Outlook for Energy in the United States to 1985, Energy Economics Division, Chase Manhattan Bank, NA, New York, June 1972.
Page 1 - This study estimates capital investment, operating costs, and selling prices for four underground bituminous mines producing coal with annual production ranging from 1.06 to 4.99 million tons. It is assumed that the mines have a 20-year life. Wages and union welfare payments are considered as of December...