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Table 1 Chemical composition of raw diatomite samples before and after firing

From: To blend is a good solution to improve the heat insulation applicability of diatomite ores

Constituent Original samples, % After firing, %
M2 K2 D2 M-2 K-2 D-2
SiO2 17.03 58.96 58.61 24.36 70.86 67.51
Al2O3 3.42 9.37 9.72 4.89 11.26 11.20
Fe2O3 3.75 7.05 5.94 5.37 8.48 6.84
MnO 0.65 0.19 0.36 0.93 0.23 0.42
MgO 1.52 1.01 1.52 2.16 1.21 1.75
CaO 40.97 2.82 7.21 58.59 3.38 8.31
Na2O 0.98 0.76 0.45 1.40 0.92 0.52
K2O 0.43 0.96 1.08 0.62 1.15 1.24
TiO2 0.48 0.82 0.78 0.69 0.99 0.90
L.O.I. 30.10 16.80 13.20
Ca/Si 2.58 0.05 0.12
Ca/Al + Si 2.08 0.04 0.10
Al/Al + Si 0.19 0.11 0.15
Ca/Si + Mg 2.27 0.05 0.13