Silica Brick

Short Description:

Silica brick is an acidic refractory material with good resistance to acid slag erosion. The softening temperature of the silica brick under load is as high as 1640~1670°C, the volume is relatively stable at high temperature, and it can be used for a long time.

An acidic refractory material mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phase. The silicon dioxide content is above 94%, the true density is 2.35g/cm3, it has resistance to acid slag erosion and higher high temperature strength. It will not deform after long-term use at high temperature. Low thermal shock stability (1~4 times of heat exchange in water) Natural silica is used as the raw material, and an appropriate amount of mineralizer is added to promote the conversion of quartz in the body to tridymite. Slowly fired at 1350~1430℃ under reducing atmosphere. When heated to 1450℃, there will be about 1.5~2.2% of the total volume expansion. This residual expansion will make the cut joints close and ensure that the masonry has good air tightness and structural strength.


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PRODUCTIVE PROCESS

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Description


Silica brick is an acidic refractory material with good resistance to acid slag erosion. The softening temperature of the silica brick under load is as high as 1640~1670°C, the volume is relatively stable at high temperature, and it can be used for a long time.

An acidic refractory material mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phase. The silicon dioxide content is above 94%, the true density is 2.35g/cm3, it has resistance to acid slag erosion and higher high temperature strength. It will not deform after long-term use at high temperature. Low thermal shock stability (1~4 times of heat exchange in water) Natural silica is used as the raw material, and an appropriate amount of mineralizer is added to promote the conversion of quartz in the body to tridymite. Slowly fired at 1350~1430℃ under reducing atmosphere. When heated to 1450℃, there will be about 1.5~2.2% of the total volume expansion. This residual expansion will make the cut joints close and ensure that the masonry has good air tightness and structural strength.

Features

Has good high temperature fire resistance / Excellent slag and abrasion resistance

Repeated burning without shrinkage / Has good resistance to acid slag erosion

Application

Silica brick mainly used for the partition walls of the coking chamber and combustion chamber of coke ovens, the regenerator and slag chamber of steel-making open-hearth furnaces, soaking furnaces, refractory materials of glass melting furnaces, and ceramic firing kilns and other furnaces. Load-bearing parts. It is also used for high temperature load-bearing parts of hot blast stoves and acid open hearth furnace roof.

Physical And Chemical Indicators

 Brand / Properties

GZ-96

GZ-95

GZ-94

Chemical Composition (%)

SiO2

≥96

≥95

≥94

Fe2O3

≤1.0

≤1.2

≤1.4

Apparent Porosity (%)

≤22

≤22

≤22

True Density (g/cm3)

≤2.34

≤2.35

≤2.35

Cold Crushing Strength (MPa)

≥30

≥30

≥30

@0.2MPaRefractoriness Under Load (℃)

≥1660

≥1650

≥1640

Main Applications

   Hot-blast furnace
Coke oven
Glass kiln

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  • 1.Raw material quality control including physical and chemical testing.           
    2.Crushing and grinding of bulk raw materials.
    3. According to customer data sheet required to mixing Raw Material.
    Pressing or shaping the green brick depend on different raw material and brick shape.
    4.Dry the bricks at dryer kiln.
    5.Put the bricks into the tunnel kiln to burning by higher temp from 1300-1800 deg.
    6.The quality control department will inspect the finished refractory bricks random.

    Packaging  according to safety sea-exporting packing Standard
    Dispatch : loading the finished packing material at factory by container Door toDoor   
    By sea fumigated wooden pallet + plastic belt  + plastic film wrap.

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