Chemical specification: ConstituentPct Sio299.5-99.85 Fe2o30.011-0.014 Cr2o30.0003 max Tio2Traces Al2o30.10-0.20 Cao0.02-0.05 Mgo0.002-0.005 L.O.I0.1-0.2 Grain size distribution (1): A p ìm0.8 mm % 0.850.00 - 0.5 max +0.600 – 0.8501.00 – 3.00 +0.425 – 0.6004.00 – 10.00 +0.212 – 0.42540.00 – 60.00 +0.150 – 0.21220.00 – 30.00 -0.1510.00 – 20.00 Grain size distribution(2): A p ìm0.6 mm % 0.60.00 – 0.5 max +0.400 mm3.00 – 5.00 +0.150 mm78 – 85 +0.125 mm13-17 +0.105mm1.8 - 2.5 +0.74mm1.7 – 2.2 Below0.3 – 0.6 Ewight