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 heat-conductivity.Coke oven should use the silica brick with small true density. And the phosphorus quartz is better than others.
Feature of silica brick :
1. Low bulk density, low thermal conductivity, good thermal insulation performance.
2. Refractory category allow direct contact of fire, suitable offer various atmosphere
3. Good integrity with furnace lining, long service life, easy operation, could be shaped freely
4. Can be used in various kilns because of its cheapness and general tray package.
Specification of silica brick :
Item | RG-94 | |||
Brick for roof ,wall of the hot blast stove | Check brick | |||
SiO2(%) | ≥95 | |||
Al2O3(%) | ≤1.0 | |||
Fe2O3(%) | ≤1.2 | |||
Apparent Porosity(%) | ≤22(24) | ≤24 | ||
True Density(g/cm3) | ≤2.33 | ≤2.34 | ||
Cold Crushing Strength (Mpa) | ≥40 | ≥30 | ||
0.2Mpa Refractoriness Under Load ( ℃) | ≥1650 | |||
0.2Mpa creep rate (1550℃)% | 0h-50h | ≤0.8 | ||
The Rest Quartz Content | ≤1.5 | |||
The Coefficient of Thermal Expansion | ≤1.26 | |||
Advantage of silica brick :
1.Silicon oxide is above 96%.
2.Good acid erosion resistance.
3. High softening point with temperature.
4. No shrink in burn repeatedly.
5.Temperature of refractoriness under load is above 1680º C
Stable Capability, High Quality, Excellent Service, Competitive price is the most important advantage of our products.
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
