Andalusite Bricks for Hot Blast Stove Introduction
The high content of andalusite Al2O3 and low impurity content are ideal high grade refractories material. At the same time, the volume change of andalusite refractory bricks for hot blast stove in the sintering process is only stable. The andalusite refractory bricks have excellent low thermal conductivity, high resistance to slag corrosion and creep resistance. Refractory adalusite bricks have high heat strength, low porosity, resistance to chipping and anti transformation under pressure drop, thermal shock resistance, good refractoriness. The micro-expansion of andalusite fire bricks changes the use of materials and the extension of their service life. Andalusite refractory brick are used in the hot blast stove of working layer
Andalusite Bricks for Hot Blast Stove Advantages
Refractory andalusite brick has a low temperature, a low conversion temperature, low thermal expansion during the conversion process, and coarse crystals, andalusite rafractory bricks can be used for the aggregates, all of which can make the andalusite can be directly used for the production of fired or unburned bricks without calcination, and saves a lot of energy.
Andalusite refractory brick has a series of advantages, andalusite bricks creep resistance is strong. The creep is a measure of the long-term resistance of the refractory brick to the high temperature load, the melt impurities which prematurely soften the andalusite refractory bricks have a great influence on the creep.
Andalusite refractory bricks have high temperature strength is high and decreases with increasing temperature.
The high temperature strength is related to the amount of liquid phase formed inside the refractory brick at a high temperature.
Andalusite brick has high temperature and volume stability, and other AL2O3-Sio2 series refractory bricks with better thermal shock stability than Al2o3 content, strong chemical resistance
Andalusite Bricks for Hot Blast Stove Specification
Index
Item |
|
RSGX-135 |
RSGX-140 |
RSGX-150 |
| Al2O3 |
(%) ≥ |
65 |
65 |
65 |
| Fe2O3 |
(%)≤
|
1.5 |
15 |
1.0 |
| Bulk Density |
(g/cm3) ≥ |
22 |
22 |
20 |
| Apparent Porosity |
(%)≤
|
2.40 |
2.50 |
2.60 |
| Cold Crushing Strength |
(Mpa) ≥ |
60 |
60 |
80 |
| 0.2Mpa Refractoriness Under Load |
℃≥
|
1520 |
1550 |
1600 |
| Refractoriness |
℃ ≥ |
1790 |
1790 |
1790 |
| (0.2Mpa,20-50h,%)Creep rate |
(%) |
0.2 |
1400℃
0.2 |
1400℃
0.2 |
| Thermal Shock Resistance (1000℃,water,quenching,cycle) |
℃ |
15 |
20 |
20 |
Andalusite Bricks for Hot Blast Stove Manufacturing Process
Andalusite fire bricks are made of andalusite as raw material, andalusite refractory bricks are added with powders such as sillimanite powder and mullite powder. The binder is added in proportion, then mullite powder, andalusite fine powder and sillimanite powder are placed in the mixed sand. Machine mixing, adding clay and mixing water of 2% of the total weight of the raw materials, then adding silicon micropowder for mixing, pressing brick into a fire brick, drying the refractory brick and putting it into a firing kiln for sintering, burning into andalusite refractory brick.
Andalusite Bricks Manufacturer from RS Refractory Bricks Supplier
Rongsheng refractory brick factory has been engaged in refractory material industry for more than 20 years. Rongsheng refractory factory have a big technological team, there are more than 15 senior designers for the furnace & kiln. They are good at different technological field, for exam, refractory bricks , castable refractory , lightweight insulation firebricks and prefabricated bricks according to client requirement. Rongsheng refractory factory can provide various finished refractory bricks as well as competitive price & high grade quality adalusite firebricks products.
