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low porosity refractory fire clay brick for glass furnace
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1.Introduction:
low porosity refractory fire clay brick for glass furnace produced with Al2O3 content is above 42%, and a small number of alkali metals, metal oxides, etc. Mineral composition is usually mullite, quartz and glass phase. Its refractoriness is 1580-1750 °C, refractoriness under load is 1250-1450°C, with good thermal resistance and strong ability to resistant acid slag.
2.Features of refractory fire clay brick
1.reduce the heat capacity of kiln walls
2.promote the heat efficiency of kilns
3.high strength
4.corrosion and erosion resistance
3. Application
refractory fire clay brick is used for industry kilns and inner lining of kilns wall.
4.Physical and chemical indexes of refractory fire clay brick:
|
Index |
fire clay refractory brick |
|||
|
DN-10 |
DN-12 |
DN-15 |
DN-18 |
|
|
AL2O3 % ≥ |
45 |
45 |
42 |
42 |
|
Fe2O3 % ≤ |
1.00 |
1.20 |
1.65 |
1.80 |
|
Bulk Density≥ g/cm3 |
2.40 |
2.35 |
2.30 |
2.25 |
|
Apparent porosity % ≤ |
10 |
12 |
15 |
18 |
|
Cold crushing strength Mpa (Mpa) ≥ |
70 |
65 |
60 |
48 |
|
Refractoriness ≥ °C |
1750 |
1750 |
1750 |
1750 |
|
Reheating Linear Change% |
1400°C×2h -0.1~+0.05 |
1400°C×2h -0.1~+0.05 |
1400°C×2h -0.2~0 |
1400°C×2h -0.4~0 |
|
0.2Mpa Refractoriness under loadT0.6 ≥ °C |
1500 |
1470 |
1450 |
1400 |
