Low Price High Quality Silica-Mullite Brick 1650 Furnace Refractory
Brick For Kiln And Furnace
Product Advantages of Silica Mullite Brick For Cement Kiln
Transition Zone:
1. High load softness and excellent high temperature resistance
(the actual test value of the load softening temperature is stable
above 1680 ℃, which has been greatly improved on the basis of
silica-molecular bricks, and is comparable to magnesia-aluminum
spinel bricks.
2. High strength, wear resistance, not easy to spall and corrode
(the actual test value of its strength is stable above 160MPa,
which is more than 3 times the strength of spinel bricks. The
strength is increased, and it is not easy to be damaged during
handling and can be fully improved. Its wear resistance, so it is
very suitable for use at 2-3 meters from the kiln mouth).
3. Low thermal conductivity and good thermal insulation effect (the
performance and use of magnesia-aluminum spinel bricks, the thermal
conductivity of silicon-moulded bricks is too large, resulting in
higher temperatures in simplified form; silica mullite 1650 bricks
are still high-aluminum-silicon carbide The characteristics of the
product and the material itself determine its lower thermal
conductivity. In the same period, the temperature can be reduced by
more than 50℃)
4. Strong flexibility and excellent thermal shock resistance (its
good thermal shock stability can fully adapt to the environmental
requirements of frequent fluctuations in the temperature of the
transition zone)
5. The density is moderate and the simplified load is reduced (the
volume density of the silicon-molded red brick is more than 8%
lower than that of the magnesia-aluminum spinel brick, which leads
to a reduction of the simplified load of the silicon-molded red
brick by more than 8% within the unit length of the same kiln type)
6. The price of silica mullite 1650 bricks is also preferential to
that of magnesia alumina spinel brick, so silico red is used in the
transition zone of rotary kiln, which is indeed economical and
applicable.
Silica mullite1650 Brick For Cement Kiln Transition Zone
The temperature of the brick surface in the transition zone of
cement rotary kiln is about 1 400 ℃. The temperature of the
preheating zone and cooling zone is lower than that of the
transition zone. That is, the burning zone is protected by the kiln
skin, and the temperature of the brick surface is not high.
The starting temperature of brick softening under load is above
1500 ℃, especially the product structure is dense, composed of
high-hardness minerals, corundum, silicon carbide, mullite, with
particularly good wear resistance, Silica mullite Brick azm 1650 is
an ideal type of brick for the transition zone.
Compressive strength and load softening temperature are obviously
higher than that of anti-stripping high alumina bricks. Its thermal
shock stability, corrosion resistance, wear resistance, and thermal
conductivity are not high, which are required by the process
characteristics of the post transition zone. The life span is 1.5-2
times that of the anti-stripping brick. Good wear resistance is
more suitable for cooling belts. The service life can reach more
than two years, which is 3-5 times longer than the service life of
high alumina bricks. Now, according to the use conditions of
different sections of the rotary kiln, different grades of silica
bricks with different properties have been applied.
In addition, the thermal conductivity of Silica mullite Brick azm
1650 s is lower than that of alkaline products, so the thermal
insulation effect of silicon-modified bricks is better. Silica
mullite Brick azm 1650 s are used in the secondary firing zone,
transition zone, preheating zone, kiln tail, tertiary air duct,
calciner, etc. of large rotary kilns. Compared with alkaline
bricks, the surface temperature of the cylinder body is lowered by
more than 100 ℃.
Product Specification of Silicon Mullite Brick
Item | RSAZM-1650 | RSAZM-1680 |
AI2O3(%)≥ | 63 | 65 |
SiO2+SiC(%)≥ | 35 | 30 |
(%)≤Apparent Porosity | 22 | 20 |
(g/cm3)≥Bulk Density | 2.50 | 2.60 |
(MPa)≥Cold Crushing Strength | 85 | 90 |
0.2MPa Softening temperature load degree T0.6(℃) | 1600 | 1630 |
Thermal shcok resistance(1100℃)water quenching cycle | 10 | 12 |
Refractoriness(℃)≥ | 1790 | 1790 |
(1000℃)W/m.k Thermal conductivity | 2.5 | 2.3 |
