Application of dry separative methods for decreasing content the residues unburned coal and separation Fe from black coal flies ash
Titel:
Application of dry separative methods for decreasing content the residues unburned coal and separation Fe from black coal flies ash
Auteur:
Vladimír Bláha František Kaľavský
Verschenen in:
Acta Montanistica Slovaka
Paginering:
Jaargang 13 (2008) nr. 2 pagina's 235-240
Jaar:
2008
Inhoud:
Main obstacle using of fly ashes in building, that is its main consumer, is the residue of unburned coal; it is expressed of loss onignition - LOI. In present, the valid STN and EU standard limits the content of LOI to 3 – 5 %, in national conditions maximum 7 %.Application of processing technologies also has to assure utilization of fly ash that provides a possibility of complex utilizationof individual products obtained by modification.By means of corona separation, based on different conductivity of individual fly ash elements, it is possible to separate unburnedcoal particles. The fly ash sample from black coal burning in melting boiler that was deposited on fly ash deposit, content of LOIof dielectric particle 6,45 % at 61 % weight yield was achieved. In the samples taken from dry taking of fly ash the non-conductingproduct contained 7,72 % of LOI at 73 % of weight yield.
Uitgever:
Technical University of Kosice, the Faculty of Mining, Ecology, Process Control and Geotechnologies (F BERG)
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