GB/T 5069-2015

This standard specifies the chemical analysis methods for magnesium-aluminum refractory materials. The items analyzed in this standard are as follows: a) loss on ignition (LOI); b) silica (SiO2); c) alumina (Al2O3); d) iron oxide (Fe2O3); e) titanium dioxide (TiO2); f) calcium oxide (CaO); g) magnesium oxide (MgO); h) potassium oxide (K2O); i) sodium oxide (Na2O); j) manganese oxide (MnO); k) phosphorus pentoxide (P2O5); l) free calcium oxide (F.CaO) in magnesia; m) zirconium oxide (hafnium) [Zr(Hf)O2]; n) chromium trioxide (Cr2O3). This standard is applicable to the determination of the analyzed elements in magnesium-aluminum refractory materials, the scope of which is shown in Table 1.