Silica Bricks for Tunnel Kiln

Silica Brick for Tunnel Kiln Introduction
 
Silica bricks for tunnel kiln for siliceous refractory products containing scaly quartz as the main phase in the high temperature part of the tunnel kiln.Due to the increase of wind temperature, the clay refractory bricks or high alumina refractory bricks used in the high temperature parts of the previous silica fire brick are gradually replaced by silica refractory bricks and low creep high alumina bricks.
 
Silica Brick for Tunnel Kiln Feature
 
1.Under the condition of long-term high temperature and load, the volume is stable, the creep rate of high temperature is low, and one or even two blast furnaces can be used continuously.
 
2.Good thermal shock resistance above 600 degree C. Adapt to the variability of the silica bricks temperature to keep bricks and masonry intact.
 
3.Chemical resistance is better than clay fire bricks and general high alumina bricks. The erosion of silica bricks by alkaline substances in gas and smoke is limited to the formation of a glass phase on the surface and does not peel off.
 
4.The thermal conductivity of refractory silicon brick used in tunnel kiln is larger than that of refractory clay bricks and high alumina bricks, which is beneficial for storing and releasing heat in a short time.
 
Silica Brick for Tunnel Kiln Products Requirement
 
The shape of the refractory product should be regular and the dimensional deviation should be small. The difference of the hole diameter of the check brick is ±1mm, and the Silica bricks for tunnel kiln of other parts should not exceed ±1%. If the joint of the upper part of the external combustion type is made of composite brick, it needs to be cut before the masonry. Grind and pre-assemble. The surface crack width is not more than 0.5 mm and should have a length limit side. Cracks less than 0.1mm wide will not affect the use, there should be no cracks caused by improper cooling
 
Silica Brick for Tunnel Kiln Using Requirement
 
silica fire bricks should be stored in a waterproof warehouse and can be used after being wetted at a temperature below 100 degree Celsius. Water-containing silicon bricks are affected by freezing and need to be re-inspected. The furnace should be set up to expand the expansion joint according to the thermal expansion rate provided by the manufacturer. The temperature rise curve of the oven should be reasonably formulated, especially in the more intense stage of expansion before 600 degree Celsius.
 
Silica Bricks for Tunnel kiln Using Effect
 
1. At present, low creep high aluminum checkered bricks produced by "flat expansion" are not suitable for use in high temperature zones of hot blast stove regenerators.
 
2. At present, the country's access to low creep high aluminum checkered bricks is too low, and the technical requirements are too low. In the future, if low creep high aluminum checkered bricks are used, the creep rate, rate of reheating line, thermal shock stability, requirements for apparent porosity and impurity content.
 
3. The use of silica brick in the high temperature zone of the hot blast stove is a reasonable choice.
 
4. Pay attention to the stability and rationality of the air supply system.
 
Silica Brick for Tunnel Kiln Specification