Name

     Item            

Series of kiln furniture used in tunnel kiln

Cordierite- mullite

Melted quartz – mullite

Corundum - mullite

Al2O3,%

38-45

40-45

42-45

50

70

SiO2,%

43-51

43-51

43-51

45

25

MgO,%

5-8

5-8

5-8

K2O,%

1.5

1.7

2.1

0.20

0.20

Fe2O3

1.8

1.8

1.8

1.2

1.0

Na2O3,%

0.5

0.5

0.5

0.10

0.10

Bending resistant strength ,Mpa

8

8

9

12

15

Bulk density ,g/cm3

1.95

1.98

2.00

2.20

2.30

Porosity

26

26

26

25

24

The highest working temperature,°C

1250

1280

1300

1400

1500

Features

No deforming, long service life

Service life

100-200

50-100

30

Scope of application

fuel gas tunnel kiln, fuel tunnel kiln, rapid sintering shuttle kiln