Professional PaperU.S. Government Printing Office, 1903 |
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anthracite Appanoose County Arkansas average bituminous coals Black lignite Bony coal briquetting Brown lignite Calorific value Calorific value determined Car sample car was shipped cent Character of car chemical analysis chemical analysis.-Two samples chemical laboratory coal bed Coal Company coal nut coal was loaded coke Coke sample combustion County crushed and quartered cut from roof electrical horsepower engine coal Equipment field Fixed carbon fuel Graphic log sheet Henryetta Hydrogen Illinois inches Indian Territory Iowa Jenny Lind Kansas Kentucky lignite Louis mailed Marion County Mine.-Mine Mining Company Missouri open coal car outcrop output percentage phur Pittsburg place where section point where section producer producer-gas test Railroad roof to floor run-of-mine coal sample was obtained Samples for chemical samples were obtained screen Sections of coal shaft Shale Shober Burrows short tons slack coal Steam sample sulphur testing plant November testing purposes thickness tipple Volatile matter Warrick County washed West Virginia
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Seite 33 - ... powder smoke, a cut was made across the face of the coal from roof to floor, including all of the benches of coal mined and such impurities as were not removed in ordinary work. This cut was about 3 inches wide and 1 inch deep. The coal obtained from it, amounting to 25...
Seite 183 - ... at the time c. The difference of the two thermometer readings thus corrected, provided the corrections from the certificate have already been applied, gives the total rise of temperature due to the combustion. This multiplied by the water equivalent of the calorimeter gives the total amount of heat liberated. This result, corrected for the heats of formation of HNOs and H->SO...
Seite 33 - The sample was placed in an air-tight galvanized iron can, having a screw top, and the can was hermetically sealed by screwing the top down tight and covering the joint with adhesive tape. The can containing the sample was then mailed to the testing plant. When it reached the chemical laboratory, the sample was at once transferred to a glass jar, in which it was sealed until the time arrived for making a chemical analysis. By being sealed at the mine the sample reached the chemical laboratory with...
Seite 185 - The other end of the tube was closed by a well-rolled cork of specially selected quality, the danger from overheating at this end of the tube being too great to permit of the use of the more convenient rubber stopper. The rear end of the tube for a distance of 25 cm.
Seite 155 - ... of such a size as to yield at least 5 pounds of coal per foot of thickness of coal bed — that is, 5 pounds for a bed 1 foot thick, 10 pounds for a bed 2 feet thick, 20 pounds for a bed 4 feet thick, etc. 4. All material encountered in such a cut should be included in the sample, except partings or binders more than three-eighths inch in thickness and lenses or concretions of sulphur or other impurities greater than 2 inches in maximum diameter and one-half inch in thickness.
Seite 23 - For analyzing and testing at the Louisiana Purchase Exposition the coals and lignites -of the United States, in order to determine their fuel values and the most economical method for their utilization for different purposes, under the supervision of the Director of the United States Geological Survey...
Seite 33 - ... reduced to a size not much greater than one-half inch in diameter. The sample was placed in an air-tight galvanized-iron can, having a screw top, and the can was hermetically sealed by screwing the top down tight and covering the joint with adhesive tape.
Seite 190 - VOLATILE MATTER. 1 g. of coal is weighed into a tared platinum crucible, with evenlyfitting cover, placed on a platinum triangle and heated 7 min. by means of a Bunsen burner, having a flame of 20 cm. high. The distance from the bottom of the crucible to the top of the burner should be about 7 cm. After weighing, the volatile material is calculated by subtracting the moisture from the loss in weight due to heating. FIXED CARBON.
Seite 168 - The increase in the value of coal from the grade of brown lignite to that of anthracite involves both carbon and hydrogen; it depends upon an increase (or at least no diminution) in the amount of the former and a direct loss of the latter. For this reason the ideal classification should take account of both elements. "Since the percentage of hydrogen decreases as the percentage of carbon increases the two elements should not be combined by addition or by multiplication, for both of these processes...
Seite 155 - ... and sent to the laboratory for analysis. 5. The analysis of such a sample will show the grade of coal that may be obtained by careful mining and picking. In the majority of cases the sulphur and ash in the commercial output of the mine will exceed the amount obtained from the sample, but this can be approximated by multiplying by certain coefficients.