EDF Polska CUW Ltd.

Kraków, Poland

EDF Polska CUW Ltd.

Kraków, Poland

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Bradlo D.,Cracow University of Technology | Zukowski W.,Cracow University of Technology | Czuprynski P.,EDF Polska CUW Ltd. | Witkowski K.,EDF Polska CUW Ltd.
Inzynieria Mineralna | Year: 2015

The paper presents leaching results of coal combustion products: fly ashes from the three stages of dust collecting system, slag and slurry from wet ue gas desulphurization. The static leaching method was used at room temperature, at a pH value of 1, 4, 7, 10 and 13 for 10 days. H2SO4 and NaOH were added as extraction media and L/S ratio was set to the value of 10. The highest recovery ratio was attained during leaching at a pH value of 1 for fly ash from the third stage of dust collecting system and slurry.


Bradlo D.,Cracow University of Technology | Zukowski W.,Cracow University of Technology | Czuprynski P.,EDF Polska CUW Ltd. | Jura K.,EDF Polska CUW Ltd.
Inzynieria Mineralna | Year: 2015

The paper presents physicochemical characteristic of coal combustion products: fly ashes from three stages of electrostatic dust collecting system (FAI, FAII, FAIII), slag (S) and slurry from wet ue gas desulphurization (S-wFGD). Fly ashes are classified as 'siliceous' or 'sialic-high acid'. The concentrations of selected heavy metals indicate that their values increase in accordance with consecutive stages of dust collecting system. Fly ash FAIII and slurry from wet FGD have the largest heavy metals content. The results show the increment of lanthanides and ittrium (REY) contents in CCPs from slag, through FAII and FAI to S-wFGD and FAIII.

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