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THE POSSIBILITY OF SEPARATING AND UTILISING CHAR OBTAINED FROM FLY ASHES
Abstract
The publication presents an assessment of the possibility of obtaining char from fly and fluidised ashes from coal combustion. It also presents the methodology of measuring the concentration of char in fly ashes as well as the method developed for separating char grains from fly ash samples. The research conducted has shown that both fly and fluidised ashes contain large quantities of unburnt coal grains, which can be used as a substitute in obtaining artificial graphite through the processes of graphitisation. The char content in the tested samples of fly ashes was between 5 and 8%. Grain size distribution tests of the ashes have shown a clear size difference between the fly ash and the char. A significant increase in the concentration of char grains occurred in fractions above 0.2 mm. Sieving the grain classes makes it possible to separate char from the fly ash. The use of densitometric analysis did not allow for obtaining concentrates of char from fly ashes. The grains of the char present in ashes were irregular and porous in shape and composed mostly of pure carbon.
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References10
Bastian S.: Betony konstrukcyjne z popiołem lotnym. Arkady, Warszawa, Poland, 1980;
Giergiczny Z, Rola popiołów lotnych wapniowych i krzemionkowych w kształtowaniu właściwości współczesnych spoiw budowlanych i tworzyw cementowych. Seria Inżynieria Lądowa. Monografia 325, Kraków, Poland, 2006;
Lutyńska S., Lutyński M. Potencjał krajowych surowców krytycznych istotnych dla gospodarki Unii Europejskiej (Potential of indigenous, criticalraw materials essential for the economy of the European Union), Wiadomości Górnicze, Poland, 2016, pp. 512-515;
Norrish K.,. Hutton J.T., An accurate X-ray spectrographic method for the analysis of the wide range of geological samples, Geochimica et Cosmochimica Acta 33, Australia, 1969, pp. 431-453;
Wons W., Wpływ właściwości krzemionkowych popiołów lotnych na proces speikania mas ceramicznych, Rozprawa Doktorska AGH, Poland, 2010;
BN/79/6722-09: Popioły lotne i żużle z kotłów 6722-09 I WYPEŁNIACZE opalanych węglem kamiennym I brunatnym, Poland;
PN-ISO 1953: Węgiel kamienny -- Analiza ziarnowa metodą przesiewania, Poland;
PN-ISO7936:1999: Węgiel kamienny -- Oznaczanie i przedstawianie charakterystyk wzbogacania grawitacyjnego -- Ogólne wytyczne dotyczące aparatury i procedur, Poland;
. Taylor J.C, Computer programs for standardless quantitative analysis of minerals using the full powder diffraction profile, Powder Diffraction, 6, 1991 pp. 2—9
Report on critical raw materials for the EU critical raw materials profiles. Ref. Ares(2015)1819595 - 29/04/2015.
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