Low Cement Castable
2.Type of low-cement castable and ultra-low cement castable
a.fire clay (chamotte) castable
b.high alumina castable
c.mullite and corundum castable
d.Chromium corundum and zirconium mullite castable,AZS castable
e.Alumina-spinel castable, carborundum castable
Technical data sheet
1.Low cement castable
|
Index |
Fire clay |
High alumina |
Corundum |
|
|
Al2O3 % |
45 |
75 |
92 |
|
|
SiO2 % |
50 |
12 |
5 |
|
|
CaO % |
1.8 |
1.5 |
1.5 |
|
|
Bulk density g/cm3 |
110°C,24h |
2.30 |
2.60 |
3.00 |
|
1350°C,3h |
2.26 |
2.61 |
3.10 |
|
|
Compressive strength MPa |
110°C,24h |
72 |
75 |
85 |
|
1350°C,3h |
90 |
115 |
125 |
|
|
Reheating linear change % |
1000°C,3h |
-0.3 |
-0.2 |
-0.2 |
|
1350°C,3h |
±0.3 |
±0.5 |
±0.5 |
|
|
water content to mixture % |
6.0-6.5 |
6.0-6.5 |
6.0-6.5 |
|
|
Service temperature °C |
1450 |
1600 |
1700 |
|
2.Ultra-low cement castable
|
Item |
Fire clay |
High alumina |
Corundum |
|
|
Chemical Composition % |
Al2O3 ≥ |
45 |
75 |
90 |
|
CaO ≤ |
1.0 |
1.0 |
1.0 |
|
|
Bulk density g/cm3 |
110°C,24h |
2.40 |
2.70 |
3.15 |
|
1350°C,3h |
2.35 |
- |
- |
|
|
1500°C,3h |
- |
2.65 |
3.10(1550°C) |
|
|
Reheating linear change % |
1350°C,3h |
±0.5 |
- |
- |
|
1500°C,3h |
- |
±0.5 |
±0.5(1550°C) |
|
|
Bending Strength MPa |
110°C,24h |
6 |
7 |
7 |
|
1350°C,3h |
8 |
- |
- |
|
|
1500°C,3h |
- |
10 |
10(1550°C) |
|
|
Compressive strength MPa |
110°C,24h |
40 |
40 |
40 |
|
1350°C,3h |
75 |
- |
- |
|
|
1500°C,3h |
- |
85 |
90(1550°C) |
|
|
Service temperature °C ≥ |
1500 |
1550 |
1650 |
|
Features
1.High mechanical strength and good thermal shock resistance, abrasion resistant,good density.
2.The dosage of cement is low, the content of calcium only accounts for 1/4-1/3 of common Refractory Castable
3.Water consumption rate during the construction is almost 1/2 or 1/3 of the common Refractory Castable, so the Low Cement Refractory Castable has high density and low porosity.
4.High normal temperature cure property, intensity will be increased after medium temperature and high temperature. Three or five times more than common Refractory Castable.
5.Good volume stability under high temperature.
Application
|
Product |
Application |
|
heating furnace,heat treatment furnace,furnace cover of electric furnace,shaft kiln,rotary kiln, trough of blast furnace,steel ladle,hot metal ladle |
|
|
Self flowing low cement or ultra-low cement castable |
Water cooling tube of heating furnace, ladle gas components,catalytic cracking reactor of petrochemical industry etc high temperature zone |
