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Table 1 Chemical composition of the used materials

From: Technological properties of high alumina refractories with different phosphoric acid contents

Oxide % Clay Calcined bauxite
SiO2 52.97 7.20
Al2O3 29.07 85.39
TiO2 1.48 4.08
Fe2O3 3.92 2.45
CaO 0.50 0.07
MgO 0.20 0.16
Na2O 0.06 0.02
K2O 0.28 0.27
SO3 0.76
LOI 10.62
Total 99.86 99.64