Washing and Coking Tests of Coal at the Fuel-testing Plant, Denver, Colo: July 1, 1907 to June 30, 1908

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U.S. Government Printing Office, 1909 - Coal - 54 pages
The washing tests of coal were made to determine the possibility of so improving the quality as to render it suitable (as free as possible from ash, sulphur, and other impurities) for the production of coke for use in metallurgical processes. The investigations described in this report were undertaken by the Government for the general purpose of increasing efficiency in the utilization of the fuel supply of the United States.

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Page 52 - BULLETIN 339. The purchase of coal under government and commercial specifications on the basis of its heating value, with analyses of coal delivered under government contracts, by DT Randall. 1908. 27 pp. 5 cents. BULLETIN 343.
Page 52 - Experimental work conducted in the chemical laboratory of the United States fuel-testing plant at St. Louis, Mo., January 1, 1905, to July 31, 1906, by NW Lord.
Page 52 - Report on the operations of the coal-testing plant of the United States Geological Survey at the Louisiana Purchase Exposition, St. Louis, Mo., 1904; EW Parker, J. A Holmes, MR Campbell, committee in charge. 1906. In three parts. 1492 pp., 13 pis.
Page 52 - SURVEY PUBLICATIONS ON FUEL, TESTING. The following publications, except those to which a price is affixed, can be obtained free by applying to the Director, Geological Survey, Washington, DC The priced publications can be purchased from the Superintendent of Documents, Government Printing Office, Washington, DC BULLETIN 261.
Page 34 - Both the door and the trunnel head of the oven were always closed directly after the oven was drawn and it was allowed to gather heat, the length of time varying as necessity demanded. The average time was one and one-half hours.
Page 26 - By this is meant that in mamplants the coal drawn from the bottom of the storage bin is the wettest coal in the bin, even though it was delivered thereto hours before the coal in the top of the bin. In the Survey plant this washed coal often stood in the bin a sufficient time to become thoroughly drained, and it would be hardly fair to say that an analysis of such coal "as received" would represent the moisture that would be found where the coal could not be permitted to drain in this manner. However,...
Page 52 - ... Mines Containing Gas. — (1) In any mine where as much as 2 per cent. of gas can be detected by suitable method, only locked safety lamps of an approved type should be used so long as such condition exists or is likely to recur. All safety lamps should be maintained in good condition, cleaned, filled, kept in a special room at the surface, and carefully examined, both when delivered to the miner and when returned by him at the close of each day's work. A defective safety lamp is especially dangerous...
Page 35 - Cell structure" refers to the general appearance as to size and not to the number of cells as given by percentage of cells by volume. In many tests the cell structure as determined from general appearance is small, when the percentage by volume indicates quite the reverse. The following abbreviations are used in the tables: fc, finely crushed, nc, not crushed.
Page 52 - Handling loose sives and making them Into cartridges by an open light in the mine should be prevented. (2) Detonators or caps should be handled with great care, and should be carried only by a limited number of responsible persons. C. Use of Explosives in the Mine. (1) Shooting in or off the solid should not be practiced. (2) The depth of the shot hole should be less by at least 6 inches than the depth of the cutting or mining. The use of very deep shot holes should be avoided as unnecessarily dangerous....
Page 52 - BULLETIN 362. Mine sampling and chemical analyses of coals tested at the United States fuel-testing plant, Norfolk, Va., in 1907, by JS Burrows. 1908. 23 pp.

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