Silica Bricks-DYSSB-96

Nov 20, 2023

Silica brick is an acidic refractory material mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phases.

Silica content is more than 94%. True density 2.35g/cm3. Resistant to acidic slag erosion. Higher high temperature strength. The load softening starting temperature is 1620~1670℃. It will not deform after long-term use at high temperatures. Thermal shock stability is low (heat exchange in water is 1 to 4 times). It uses natural silica as raw material, plus an appropriate amount of mineralizing agent to promote the transformation of quartz in the green body into tridymite. It is slowly fired at 1350~1430℃ in a reducing atmosphere. When heated to 1450°C, there will be a total volume expansion of about 1.5~2.2%. This residual expansion will make the seams close and ensure good air tightness and structural strength of the masonry.

Applications of bricks:


It is mainly used for the partition walls of the carbonization chamber and combustion chamber of coke ovens, the regenerators and slag chambers of steel-making open-hearth furnaces, soaking furnaces, refractory materials of glass melting furnaces and ceramic firing kilns, and other kiln vaults. Load-bearing parts. It is also used in high-temperature load-bearing parts of hot blast furnaces and acidic open-hearth furnace tops.

Product parameters:

SiO2, %, ≥ 96 95 94
Fe2O3, %, ≤ 1 1.2 1.4
Apparent porosity, %, ≤ 22(24)    
Normal temperature compressive strength, MPa, ≥ 35(30) kg/pcs,<20Kg  
  30(25) kg/pcs, ≥20Kg  
0.2MPa Load softening temperature, ≥ 1660 1650 1640(Colloidal silica1620)
True Density, g/cm3, ≤ 2.34 2.35  



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