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1. Silica brick is the main refractory bricks used in glass melting furnace;its main crystal phase is Tridymite.
2. Silica brick for glass melting furnace is used in building checker chamber, chute, combustion chamber,coking chamber,and furnace arch etc.
3. Silica brick for glass furnace have following characters:
(1)High refractoriness under load.
(2)High heat conductivity.
(3)Good thermal shock resistance.
(4)Solidity stable of capacity in high temperature.
Tech Data
Silica brick for glass furnace | |||||
Item: | GF-96A | GF-96B | GF-95A | GF-95B | |
SiO 2 | ≥96 | ≥96 | ≥95 | ≥95 | |
Fe 2 O 3 | ≤0.8 | ≤1.0 | ≤1.2 | ≤1.2 | |
Apparent porosity % | ≤22(24) | ||||
Cold Crushing Strength MPa | Brick below20KG | ≥35(30) | |||
Brick ≥20KG | ≥30(25) | ||||
Refractoriness under load ºC | ≥1680 | ≥1670 | ≥1660 | ≥1650 | |
True density g/cm ³ | ≤2.34 | ≤2.34 | ≤2.35 | ≤2.35 | |
Silica brick for coke oven | ||
Item: | CO-94A | CO-94B |
SiO2: % | ≥94 | ≥94 |
Al 2 O 3 : % | ≤ 1.5 | ≤ 1.5 |
Fe2O3: % | ≤ 1.5 | ≤ 1.5 |
Refractoriness under load 0.2Mpa | ≥ 1650ºC | ≥ 1650ºC |
Apparent porosity: % | ≤ 22 | ≤ 24 |
Bulk density: g/cm ³ | ≤ 2.34 | ≤ 2.35 |
Cold crushing strength: MPa | ≥30 | ≥25 |
Permanent linear change % (1450ºC ×2h) | 0~0.2 | 0~0.2 |
Thermal expansion(1000ºC) | ≤1.28 | ≤1.30 |
Silica brick for hot blast furnace | |
Item | HBF-95 |
SiO2 | ≥ 95 |
Al2O3 | ≤ 1.0 |
Fe2O3 | ≤1.3 |
Apparent porosity % | ≤22(24) |
Cold crushing strength MPa | ≥45(35) |
Remaining quarts % | ≤1.0 |
Refractoriness under load ºC | ≥1650 |
Creep(0.2Mpa ×1550ºC×50h) % | ≤0.8 |
Thermal expansion coefficient (1000ºC) % | ≤1.25 |
Apparent density g/cm ³ | ≤2.32 |
