According to  diagram, which is drawn according to Na2O
and K2O quantities in SiO2 and distinguishes the two magma alkaline and sub-alkaline quantities, all samples are categorized under sub-alkaline (fig.
A lab-scale process to decompose NaNO3 into Na2O
and NOx has been developed but there remains the task to engineer a suitable technology/reactor that can deal with and withstand the corrosive chemicals at the required temperatures.
Oxides of major elements (SiO2, TiO2, Al2O3, Fe2O3[Total], MnO, MgO, CaO, Na2O
, K2O and P2O5) and trace elements (Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Pb, Th, U, Ba, La, Ce, V and Cr) were utilized in this study.
Table 2: Chemical Composition of Fly Ash Component wt% Na2O
Our calculation suggested below results:SIo2 with the weight of 0/211 has the most effective indicator,Fe2o2 with the weight of 0/191was the second , Al2o3 with the weight of 0/163 was the third, Mgo with the weight of 0/133 was the fourth,Tio2 with the weight of 0/100 was the fifth, Na2o
with the weight of 0/089 was the sixth, Loi with the weight of 0/065 was the seventh and SO with the weight of 0/0/048 was the eighth effective indicator in the quality of casting silica sand.
Variation of CaO, K2O and Na2O
content appears to be independent of Al2O3 content.
Furthermore, there appear to be no correlation between CaO and Na2O
(Table 6, Figure 8).
The concentrate grades (Fe, V2O5, TiO2, SiO2, Al2O3, P, LOI, CaO, K2O, MgO, Mn, Na2O
and S) were then back calculated from these estimates.
O teor de Na2O
, por exemplo, nao deve ultrapassar 0,6% em massa no concreto.
Chemical properties of OPC Oxide composition OPC, weight (%) Na2O
001%, Loss on ignition 35%, Na2O
and K20 are below detection limit.
Baker in 1975 synthesis of sodium chromate was carried out in England from equimolar atmosphere of Na2O
and Cr2O3 and identified by x-ray diffraction patterns.