Silica Checker Bricks

  • Silica Checker Bricks

Product Description And Parameters

High refractoriness under load

High heat conductivity

Good thermal shock resistance

Solidity stable of capacity in high temperature

Silica brick is an acidic refractory material with good resistance to acid slag erosion. Its softening temperature under load is as high as 1640~1670℃, and its volume is relatively stable under high temperature for long-term use.

Main characters of silica checker brick
(1)High refractoriness under load.
(2)High heat conductivity.
(3)Good thermal shock resistance.
(4)Solidity stable of capacity in high temperature.

Silica checker brick is a kind of acid refractory material consisting mainly of scale quartz, calcite and a small amount of residual
quartz and vitreous phase. Silica content in this brick is above 94%. True density 2.35g/cm3. It is resistant to acid slag. Higher high temperature strength. The initial temperature of load softening is 1620~1670℃. In high temperature for a long time without deformation. Low thermal shock stability (water heat exchange is 1~4 times) with natural silica as raw material, plus an appropriate amount of mineralization agent, to promote the conversion of quartz in the billet into, scale quartz. It is slowly fired at 1350~1430℃ in reducing atmosphere. When heated to 1450℃, about 1.5~2.2% of the total volume expansion, the residual expansion will make the cut joints close, to ensure that the masonry has good air tightness and structural strength.

Silica Checker brick for glass furnace
Item: BG-96A BG-96B BG-95A BG-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 Checker brick for hot blast furnace
Item RG-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
Silica checker 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

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