Andalusite Bricks

Andalusite brick contain Al2O3 more than 48%, which is made of high grade bauxite through high temperature calcinations. Its refractories is usually above 1770 °C. The main mineral components are corundum and mullite phases. It is a kind of neutral refractory material so that it enjoys excellent resistance to acid and alkali corrosion. According to Al2O3 content,it can be divided into three degrees:The Al2O3 content is more than 75%.The Al2O3 content range from 60% to 75%.The Al2O3 content range from 48% to 60%.

Advantages:
1.High purity.
2.Good thermal conductivity.
3.High refractoriness under load and high tridymite content.
4.Low true densit

Application:
1.Widely used in hot blast stoves.
2.Used in high temperature sections of the checker chamber in hot blast stoves.
3.Used as low-cost alternative to andalusite and mullite checker bricks in hot blast stoves.
4.High refractoriness, average thermal shock resistance makes it suitable in consistent temperature environment.

Technical Index:
Item Silica Brick for Hot Blast Stove
Wall bricks ,Dome Bricks Checker Brick

SiO2 % Y95 Y95
A12O3 % ¨¹1.0 ¨¹1.0
Fe2O3 % ¨¹1.0 ¨¹1.0
Apparent Porosity % ¨¹22 ¨¹24
True Density g/cm3 ¨¹2.33 ¨¹2.33
Cold Crushing Strength MPa Y40 Y35
Refractoriness Under Load (0.2MPa) æ
Y1650 Y1650
Residual Quartz % 1.0 1.0
Creep Rate 0.2MPa (155050h) %
0.6 ¨¹0.6
Permanent Linear Change ( 1450*2h) %
¨¹0.2 ¨¹0.2
Thermal Expansion Coefficient(1000æ) %
¨¹1.26 ¨¹1.26



Fumigated wooden pallet, using paper or non-woven fabrics between layers separated,plastic shrink film protected outside,finaly using straps. The size of wooden pallet is 95x95cm,95x100cm or as your requirements.

High Alumina Brick, RefractoryHigh Alumina Brick, High Alumina Fire Brick for Blast Furnace

Low creep high alumina brick for blast furnace is made of corundum, mullite "sillimanite, andalusite and kyanite" and high quality bauxite clinker as raw material by shaping at high pressure and sintering at high temperature.
Characteristic:
1.The content of AL2O3 is 48%.
2.High refractoriness. The temperature is up to 1750~1790�ºC, it belongs to High-duty Refractory.
3.High refractoriness under load. The URL is higher than fireclay brick as the high content of Al2O3, however, it is lower than silica brick because of mullite crystal does not form reticular tissue.
4.Excellent slag resistance. High alumina brick is a kind of neutral refractory material so it enjoys excellent resistance to acid slag and alkali slag corrosion.

Application:
The main markets for low creep high alumina brick are building lining of hot-blast stove, blast furnace, coke oven, rotary kilns of cement and so on.
High Alumina Brickis made fromhigh grade bauxite,it has the advantage of high refractoriness under load,long service time,good thermalinsulation performance andso on