Mineral and Energy Economy Research Institute Polish Academy of Sciences Wybickiego 7a 31-261 Kraków Poland;
Lublin University of Technology Nadbystrzycka 40 20-618 Lublin Poland;
Mineral and Energy Economy Research Institute Polish Academy of Sciences Wybickiego 7a 31-261 Kraków Poland;
BIKO-SERWIS sp.z o.o.spóoka komandytowa Zakladowa 13 26-052 Nowiny Poland;
Lublin University of Technology Nadbystrzycka 40 20-618 Lublin Poland;
Grinding degree; Magnetic field grinder; Fly ash; Synthetic zeolites; Hydrothermal synthesis;