TY - CPAPER AU - Nicolae Cristea TI - PYRITE ASHES - RAW MATERIAL IN IRON METALLURGY T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on ENERGY AND CLEAN TECHNOLOGIES PY - 2013 DO - 10.5593/sgem2013/bd4/s18.019 PB - Stef92 Technology ER -