TY - JOUR N2 - The authors established the chemical and phase compositions of grain fractions of the magnesia carbon scrap disintegrated using industrial cone crushers. The investigations included chemical and XRD analyses and optical investigations. The contents of admixtures: SiO2, CaO, Fe2O3 and Al2O3 increase with the decreasing size of the scrap grain fractions, whereas the C/S ratio decreases in finer and finer fractions due to changes of the phase composition. These relations are caused by the presence of low-fusible silicate phases, characterized by their cleavage and brittleness. Such phases were mainly derived from the graphite ash containing a high silica content. The scrap after removing its finest grain fractions can be recycled and utilized for producing the magnesia-carbon refractory materials. However, the finest grain fractions may be used, e.g. as a component of gunite mixes. Many years of experience collected by the ArcelorMittal Refractories Ltd., Krakow, Poland in the field of refractory scrap utilization has also been presented. L1 - http://czasopisma.pan.pl/Content/112126/PDF/Go%C5%82awski-i-inni.pdf L2 - http://czasopisma.pan.pl/Content/112126 PY - 2019 IS - No 3 EP - 36 DO - 10.24425/gsm.2019.128531 KW - refractories KW - magnesia-carbon scrap KW - secondary raw materials A1 - Goławski, Czesław A1 - Kielski, Andrzej A1 - Obszyńska, Lucyna A1 - Wyszomirski, Piotr PB - Komitet Zrównoważonej Gospodarki Surowcami Mineralnymi PAN PB - Instytut Gospodarki Surowcami Mineralnymi i Energią PAN VL - vol. 35 DA - 2019.09.30 T1 - Refractory magnesia-carbon scrap as a valuable secondary raw material SP - 23 UR - http://czasopisma.pan.pl/dlibra/publication/edition/112126 T2 - Gospodarka Surowcami Mineralnymi - Mineral Resources Management ER -