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Bulletin of the National Research Centre

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

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