Product Details
Product overview
Fused cast alumina brick(RA-M ) is kind of alumina series fused cast refractory, which is made of imported high purity high temperature alumina powder and manufactured in special electric arch furnace above 2000 degree by melting and casting. The products are classified by the different composition of α corundun and βcorundum.
Fused cast alumina brick(RA-M) is formed by the compact structure of α-Al2O3 and β-Al2O3 crystals in a most ideal proportion. It has good corrosion resistance and stability below 1350 degrees, its characteristic is rarely produce bubbles and other in contact with molten glass and do not pollute the glass liquid. So, Fused cast alumina brick(RA-M) is widely used in the work tank of glass furnace, such as sidewall, paving, forehearths, channel，lipstone and superstructures like crown, etc.
Character
Fused cast alumina brick(RA-M ) has good corrosion resistance and stability below 1350 degrees, rarely produce bubbles and do not pollute the glass liquid. It is widely used in the work end of glass furnace.
Casting methods
Casting Type |
Name |
Density |
Application position |
PT |
Normal cast |
≥ 3.2 |
Channel, crown, |
WS |
Void free cast |
≥ 3.4 |
Work tank sidewall, paving, forehearths, channel, lip stone etc. |
Specification
Chemical Composition |
Item |
|
Unit |
RA-M |
Al2O3 |
≥ |
% |
93-96 |
Na2O+K2O |
≤ |
3.2-5.0 |
Fe2O3+TiO2 +SiO2+ CaO+others |
≤ |
2.0 |
| Physical properties |
True specific gravity |
≥ |
g/cm3 |
3.3 |
Cold Crushing Strength |
≥ |
Mpa |
200 |
Bubble separation ratio (normal soda-lime glass, 1300℃*10h) |
≤ |
% |
0.3 |
Melting glass erosion resisiting speed at static state(normal soda-lime glass, 1350℃*48h) |
≤ |
Mm/24h |
0.4 |
Bulk density Min. ≥ |
PT |
g/cm3 |
3.1 |
WS |
g/cm3 |
3.3 |
Note: Suitable to the single blocks over than 100 kg. |
Thermal expansion curve:
Application
|
|
| Channel |
Lipstone |
|
|
| Crown |
Work end sidewall |
Production line of fused cast AZS refractory:
http://www.ch-refractory.com/
Company Profile
