Physical data Components
Fineness(mesh) 200 325 1250 Al2O3 39±1%
Rate of past sift(μm97%) -43 -18 -10 SiO2 44±1%
Loss on ignition ≤14.5% ≤14.5% ≤14.5% Fe2O3 ≤0.7%
Refractoriness℃ 1770~1790 1770~1790 1770~1790 TiO2 ≤0.6%
Specific gravity 2.6 2.6 2.6 K2O+Na2O ≤0.4%
pH 6 6 6 CaO+MgO ≤0.5%
SO3 0.03%
P2O5 0.25%
MnO 0.002%