... size:15mmmax2---5mmWater treatment LevelITEMSTANDARDAl2O3,%≥1617Fe, %≤0.70.7Ph value,≥3.03.0As, %≤0.00050.0005Pb, %≤0.0020.002Water ... size,≤15mm2---5mm Non-ferric LevelITEMSTANDARDAl2O3,%≥16Fe, %≤0.005Ph value,≥3.0As, %≤0.0005Pb, %≤0.002Water Insolubles, %≤0.15Grain ... Sulphate PowderItemStandardAl2O3,%≥15.8Fe, %≤0.005 /0.5Ph value,≥3.0Water Insolubles, %≤0.15Grain size,≥10mesh -100mesh Non ferric ...