Ceramic fiber is a kind of high temperature insulation materials with low thermal conductivity, Nowadays, they are widely used in all kinds of industrial furnace systems which has changed most furnace lining design as a efficient energy saving and high temperature resistance material.
Generally speaking there are two types for bulk ceramic fiber manufacturing, one is called blowing ceramic fiber which is made by breaking the high temperature molten alumina and silica steam with compressed air. Another type is called spun ceramic fiber, which is made by dropping the molten alumina and silica on a fast spinning disc. The bulk fiber can be used to made to be many kinds shapes such as blanket, board, textile, paper, modules, felt, coating and so on. Blanket and board are the most popular and widely used shapes. They can be with a different density ranging from 64 kg/m3 to be 180kg/m3 for blanket, while 240 to 400 kg/m3 for the boards. Besides different sizes, temperature grades are available. As per customer request and the different application, nearly more than 45 type different forms and converted products can be made from ceramic fiber blanket.
Why we say ceramic fiber product has changed much for the furnace lining ?
As their characters are remarkable combination of advantages of refractories and tradition insulation products. Here below are some of the key points for reference to get the idea.
A. Low heat storage
Only 1-5% of the conventional furnace lining system which will save energy much
B. Light Weight
It is lighter than general insulation bricks, calcium silicate boards , thus it can support new type furnace structure design.
C Lower thermal conductivity
Ceramic fiber insulation products can perform better than insulation brick and calcium silicate
Block on the energy saving efficiency.
D Easy to install
The ceramic fiber products are construction specifications standardized products with no
Special skills requested. This will be no risk of cracking or spalling when they are heated
E. Easy to handled by customers
F. Easy to maintain – The ceramic fiber with problems can be replaced or repaired much quickly with a minimal down time.
G. Mechanical resilience
This character makes the ceramic fiber furnace lining can be made off-site and then delivered to the construction site without damage.
H. Good thermal shock resistance – Furnace can be heated up or cooled down more faster to improve the industrial furnace productivity and efficiency.
I. Chemical resistance.