Introduction of silica brick:
Silica brick is made of quartz stone material, the content of SiO2 is above 96%,it has good resistance to acid slag and good heat conductivity. And the refractoriness is 1690~1710°C,RUL is beyond 1680°C.
SiO2 has different types of crystals in different temperatures, and the transform between the crystals will cause the change of the bulk. So there is a close contact between the changes of SiO2 crystals and the produce ,performance and usage of silica bricks. During the heating, there will be changes of the bulk ,and cristobalite changes most, then quartz, phosphorus quartz is the slowest of all and it also has good heatconductivity.Coke oven should use the silica brick with small true density. And the phosphorus quartz is better than others.
Feature of silica brick :
1.Good acid erosion resistance.
2.Refractoriness 1680-1730°C.
3.Higher refractoriness under load,above 1620-1680°C.
4.Poor Thermal shock resistance,should not be used for the zone which temperature has rapid change.
5.Poor Volume stability at high temperature,must set aside appropriate expansion joint when laying brick.
Specification of silica brick :
Item | BG-96A | BG-96B | BG-95 | |
Chemical composition | SiO2(%) | ≥96 | ≥96 | ≥95 |
Fe2O3(%) | ≤0.6 | ≤0.8 | ≤1.0 | |
Melt Index(%) | ≤0.5 | ≤0.7 | - | |
Apparent Porosity(%) | ≤21 | ≤22 | ≤22 | |
True Density(g/cm3) | ≤2.34 | ≤2.34 | ≤2.34 | |
Cold Crushing Strength (Mpa) | ≥40 | ≥35 | ≥30 | |
0.2Mpa Refractoriness Under Load ( ℃) | ≥1680 | ≥1670 | ≥1670 | |
Permanent Linear Change On Reheating (%) 1450℃X2h | 0~0.2 | 0~0.2 | 0~0.2 | |
The Rest Quartz Content | ≤3 | ≤3 | ≤3 | |
Advantage of silica brick :
1.Good acid and erosion resistance, powerful anti high-temperature strength.
2.Refractoriness under load is 1680 °C.
3.Low thermal shock resistance.
4.Natural silica as raw material, plus regular mineralizer.
5.Ensure good bonding and structural strength of furnace.
Application of silica brick :
1.Metallurgical industry: the blast furnace, blast furnace hot blast stove, heating furnace, etc.
2.Petrochemical industry: ethylene cracking furnace, hydrogen furnace, a furnace, furnace, etc.
3.Ceramic industry: roller kiln, push board kiln, etc.
4.Industry: glass kiln heat storage room, etc.
5.Carbon industry: carbon calciner, etc
Aluminum electrolytic industry: aluminum electrolytic tank, etc.
6.Other industries: tunnel kiln, shuttle kiln, etc
Contact us
Vivian Liu
Hebei Xuankun Refractory Material Technology and Development CO.,Ltd
Factory Address :The southern part of Beichengzhai Village, Xingtang Town,Shijiazhuang City, Hebei Province , China (Mainland)
Tel : 0311-66633547
E-mail:offer at xkrefractorybrick dot com
We-chat :lw1332875843
Whats-app:+86-17731628702
Skype:sunshine1332875
