Identifier: testsonclaymater18stul (find matches)
Title: Tests on clay materials available in Illinois coal mines
Year: 1917 (1910s)
Authors: Stull, R. T. (Ray Thomas), 1875-1944 Hursh, Ralph K. (Ralph Kent), 1885- Illinois State Geological Survey University of Illinois (Urbana-Champaign campus). Engineering Experiment Station United States. Bureau of Mines
Subjects: Clay Coal mines and mining
Publisher: Urbana, Illinois State Geological Survey, University of Illinois
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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in vacuo for 24 hours ( fig. 5). Thesaturated weights and suspended weights were determined and theporosities calculated from the formula W — D W x 100 porosity Where : W = saturated weight.D = dry weight,S = weight suspended in water TESTS OX SAMPLES I \T GROUP II Group 11 contains 83 different samples, including Xos. 26 to 108.In testing so large a number it was obvious from the experiencegained in Group I that it would be necessary to save time and expenseby devising more efficient means for preparing the samples and mold-ing the briquets. sOwing to the erratic behavior of cones, more consistent results arc obtainable byusing a pyrometer as the temperature indicator, and making all burns according to a definitetime-temperature curve after passing tin- oxidation period. The indicated temperatures inCentigrade for these cones are: Cone 010 OH 06 04 03 02 01 1 2 3 Temperature degrees Q50 )<)() 1030 1«)70 10<)0 1110 1130 1150 1170 1190 24 CLAY MATERIALS IN ILLINOIS COAL MINES
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A 6-inch wrought iron pipe B Cap C Machined flange D Glass desicator cover E ^4-inch pipe F Outlet pipe with cap G Rubber pressure tubing H Glass T J Mercury vacuum gauge K Level of water L Briquets M Pipe to vacuum pump Fig. 5.—Apparatus for saturating briquets in vacuo. 25 TESTS ON SAMPLES IN GROUP II Grinding the Samples The samples were ground in a 5-foot dry pan provided withperforated plates with one-tenth-inch slots. A circular sheet-iron panprovided with a slot 5 inches wide running from the center to thecircumference was bolted to the frame 6 inches below the grindingpan. Heavy brushes were attached to the under side of the dry panand revolved with it sweeping over the inner surface of the sheet-iron pan. The dry pan was set in motion and the clay sample ofapproximately 45 to 50 pounds introduced. As fast as the materialbecame crushed and passed through the one-tenth-inch perforation, it -■- ~-t JTr. jj^^> ;£ » lililSi mpr ,.;. •» jitk ■H^ ^^F •^Iti.SSi&s

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