| The alumina bubble produced
by the company is a hollow spherulitic heat-inaulating meterial,which
is made by electrofused method.It is noted for its light-weight,heat-resistance,close
pore.It is an ideal filler for high-temperatuer furnaces and and
excellent aggregate of light weight castable refractory.And it is
an ideal heat-inaulating and energy-saving refractory in high temperatrue. |
| Items |
Unit |
Index |
| Chemical
composition |
Al2O3 |
% |
98.5min |
| SiO2 |
% |
0.25max |
| Fe2O3 |
% |
0.10max |
| Na2O |
% |
0.40max |
| Refractoriness |
°C |
1800min |
| Principal
crystalline |
-- |
a
-Al2O3 |
| Packing
density |
g/cm3 |
0.50~1.00 |
| Particle
size |
mm |
¦Õ0.2~5 |
| Light Weight
Alumina Bubble Castable Refractory |
| Properties |
Brands |
KT-Çá |
GL-18C |
| Chemical
composition(%) |
Al2O3 |
¡Ý95 |
¡Ý95 |
| SiO2 |
¡Ü0.5 |
¡Ü0.5 |
| max
service temperature ( ° C ) |
1800 |
1800 |
| bulk
density after burnt at 1500 ° C(g/cm3) |
1.35-1.40 |
1.35-1.40 |
| Linear
changes after burnt at (1500°C¡Á3h)(%) |
¡À0.5 |
¡À0.5 |
compressive
/ bending
strength ( MPa ) |
110
° C¡Á24h |
¡Ý8
/¡Ý3 |
¡Ý8/¡Ý3 |
| 1100
° C¡Á3h |
¡Ý15/¡Ý4 |
¡Ý15/¡Ý4 |
| 1500
° C¡Á3h |
¡Ý20/¡Ý6 |
¡Ý25/
¡Ý6 |
| max
particle size of bubbles(mm) |
5 |
5 |
water content for construction (%): |
9-12 |
9-12 |
| thernel
conductivity coefficient(w/m.k) |
0.7-0.8 |
0.7-0.8 |
| The alumina bubble is
a hollow spherulitic heat-insulation matrials,which is made by electro
fusing method.It is noted for its light-weight,heat-resistance,close
pore.It is an ideal filler for high-temperature furnaces and an
excellent aggregate of light weight castable refractory. |
| Physical Chemical
Performance Index |
| SPEC |
Al2O3:99.00%
MIN |
| Fe2O3:0.15%
MAX |
| Na2O:0.40%
MAX |
| SiO3:0.25%
MAX |
| Size |
0.1-5.0mm(or
in mesh size) |
| Packing
density |
0.45-1.0g/cm3 |
| Main
crystalline |
a-Al2O3 |
| Working
temp. |
1800°
C |
| Packing
|
200KGS
or 25KGS BAGS+BIG BAGS |
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