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Show 2 .0 EXPERIMENTAL TECHNIQUE 2.1 Coals Studied: Samples of coal from Upper Freeport seam (identified as Keystone coal, supplied by Pennsylvania Electric Company) and from the Pittsburgh seam (identified as E-5, supplied by Penn Relton Company at two different times) were used to calibrate and test the furnace at different firing rates. Coal from the Illinois No. 6 seam and lignite from the Wilcox seam of Texas (supplied by Combustion Engineering, Inc., Windsor, Connecticut) were chosen to conduct the slag deposit study because Combustion Engineering, Inc. found them to behave as bad slaggers. These two coals were pulverized, as standard mesh sizes comparable to the ones used for utility boiler furnaces, by Kennedy Van Saun Corporation, Danville, Pennsylvania. The proximate and ultimate analyses, as well as the rank classes of these coals, are given in Tables 1 and 2 respectively. The size distribution of these coals was determined by the screen analysis method and the result is shown in Table 3. Also, the screen analyses data for old and new Pittsburgh seam coals are given in Table 7. The mineralogical analyses of Keystone coal, Illinois No. 6 coal and Texas lignite were carried out in the Mineral Constitution Laboratory of the Pennsylvania State University, Table 4. Table 5 shows the chemical analyses of the ashes carried out in the same laboratory. 4 2-5 |