ITEMS

INDEX

DN-IE

DN-IG

DN-IN

maximum service temperature          °C

1225

1300

1400

AL2O3%                                      MIN

35

42

55

Fe2O3.%                         MAX

1.5

1

1

Bulk density(B.D)g/cm3               MAX

0.7

0.8

1.0

Cold crushing strength(CCS)MPa  MIN

1.5

1.8

2.5

Permanent linear change

%

0—1

0—1

0—1

°C*12h

1250

1400

1500

0.02N/mm2      °C

Refractoriness under load

0.5%     ≥

1160

1250

1380

2.0%     ≥

1200

1350

1470

5.0%     ≥

1250

1400

1510

(M./M.K)

Thermal conductivity

20°C     ≤

0.17

0.25

0.38

1000°C   ≤

0.30

0.40

0.48