TY - JOUR N2 - Hard coal sludge is classified as group 01 waste or it is a by-product in the production of a hard coal with variable energy importance. Pulverized lignite is not waste but a final product of drying and the very fine pulverization of lignite with a high calorific value. The study comprised the basic material before granulation such as coal sludge (PG SILESIA) and pulverized lignite (LEAG) as well as their prepared blends after the granulation on a pipe vibration granulator designed at AGH. The pulverized lignite of the LEAG company shows a low sulfur contents. In the analyzed samples its average content (Stot d) is 0.61%. An average value of this parameter in the analyzed coal sludge samples is 0.55%. The addition of pulverized lignite does not have a significant impact on the total content of sulfur and of analyzed toxic elements (Hg, As, Cd, Cr, Co, Cu, Mn, Ni, Pb, Sb, Tl, and W) in the samples. The calorific value of coal sludge falls within the range of 11.0−12.4 MJ/kg (on a dry basis). For the coal sludge and pulverized lignite blends the calorific value clearly increases to values of 14.8−17.7 MJ/kg (on dry basis). The calorific value slightly decreases in the L1 - http://www.czasopisma.pan.pl/Content/114890/PDF/07-08-klojzy-i-inni.pdf L2 - http://www.czasopisma.pan.pl/Content/114890 PY - 2019 IS - No 3 EP - 98 KW - coal sludge (of hard coal) KW - pulverized lignite (coal dust from lignite) KW - granulation KW - quality parameters KW - calorific value A1 - Klojzy-Karczmarczyk, Beata A1 - Mazurek, Janusz A1 - Wiencek, Marek A1 - Feliks, Jacek PB - Instytut Gospodarki Surowcami Mineralnymi i Energią PAN VL - vol. 22 DA - 2019.11.03 T1 - Blends of hard coal sludge with pulverized lignite as alternative energy raw materials SP - 83 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/114890 T2 - Polityka Energetyczna - Energy Policy Journal ER -