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Product details

 Good Thermal Shock Resistance Fire Clay Brick Used For Furnace

Detailed Product Description

Classification:

SK32; SK34; SK36; SK38

Product Name:

chamotte fireclay brick

Size:

Standard Size: 9'' * 4'' * 2.5''

Feature:

Thermal Insulation

Usage:

Linings, Furnaces And Kilns etc.

Refractoriness:

 1300º C

Fire clay Bricks as the oldest and most widely used refractory materials is made of clay chamotte as the aggregate and refractory clay as the anchoring agent.The Al2O3 content of the Fire clay Brick is from 30-48%.As for the Fire clay Bricks of China, The content of Al2O3 is more than 40%,the content of Fe2O3 is less than 2-2.5%.The ingredient of the bricks contains 65-85% clay chamotte and 35-15% refractory clay.

During the manufacturing, first mix the clay chamotte with refractory clay powder, then prepared with clay aggregate into dry mud, high pressure molding, sintering at about 1400C.Under high temperature, the fire clay bricks show weakly acidic, and the ability of resistance to alkaline slag erosion is poor, but with the increase of the content of Al203,the thermal stability of fire clay bricks is better than silica brick, magnesia brick and so on.

SPECIFICATION

High alumina refractory brickf for hot blast furnaces    
Item   RL-65G RL-55G RL-48
Al2O3,%   65 55 48
Refractoriness,℃   1780 1760 1740
Apparent porosity,% 22 22 22
Cold crushing strength,Mpa 50 45 40
Refractoriness under loading 0.2Mpa,℃ 1500 1470 1420
Reheating change        
     (1450℃,2h),%       -0.2~0
     (1500℃,2h),%   -0.2~0 -0.2~0  
Thermal shock resistance(cycles, 1100s℃,cold water) (furnace roof/wall)6
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