Durable, highly thermal shock-resistant blast furnace and slag ditch castable suitable for various high-temperature metallurgical scenarios

project

Blast furnace tapping trough castable

Non-aqueous silicon carbide refractory mud

Non-aqueous blast furnace feed material

Silicon carbide filler

iron wire

slag line

Maximum operating temperature , ℃

1550

1550

-

-

Long-term use temperature

Al ₂ O ₃ , % ≥

72～78

58～60

-

≥60

-

SiC, % ≥

12～20

15～35

85

-

45

Fe ₂ O ₃ , % ≤

-

-

0.8

-

-

Bulk density , g/cm ³ ≥
Bulk density

110℃×24hrs

2.95

2.85

-

2.2

2.2

1500℃×3hrs

2.90

2.80

-

-

-

Compressive strength, MPa ≥
CCS

110℃×24hrs

25

25

-

-

4.0

1500℃×3hrs

30

30

20
(1400℃×3hrs)

Flexural strength, MPa, ≥
MOR

110℃×24hrs

6.0

6.0

Flexural bond strength

(110℃×24hrs)

8

2.5

1500℃×3hrs

6.5

6.5

10
(1300℃×3hrs)

4
(1200℃×0.5hrs)

3
(1400℃×3hrs)

Thermal conductivity, W/(m·k), ≥
Thermal conductivity

-

-

-

-

6

Refractoriness , ℃ ≥
Refractoriness

1700

1700

-

1760

-

Linear change rate , %
Linear change after heating

±0.6
(1500℃×3hrs)

±0.6
(1500℃×3hrs)

granularity %
(Grain size)
≥0.5mm,≤ 2.0
＞ 0.074mm,≥55

±0.6
(1200℃×3hrs)

±0.5
(1200℃×3hrs)