Table 2 Chemical compounds of RBCA

Magnesium oxide (MgO)

8.689

Iron oxide (Fe₂O₃)

51.242

Chromium oxide (Cr₂O₃)

27.35

Sulfur trioxide (SO₃)

4.869

Nb₂O₅

0.079

Aluminum trioxide (AI₂O₃

2.539

Calcium oxide (CaO)

1.959

Loss of ignition (LOI)

1.813

In₂O₃

0.008

TiO₂

0.813

ZrO₂

0.079

NiO

0.57

MnO

0

SnO₂

0.051

Potassium oxide (K₂O)

0

Silicon dioxide (SiO₂)

4.611

Insoluble residue

-

Others

-

P₂O₅

0.739

ZnO

0.05