Clay brick tunnel kiln clay refractory brick material tunnel kiln carts refractory materials bricks
Tunnel Kiln Clay Fire Blocks Thermal Insulation Basic Refractory Bricks Material
Clay refractory bricks are refractory products with alumina content of 30~48% made of clay clinker as aggregate and refractory clay as binder.
The raw materials for making clay refractory bricks are clay minerals, and refractory clays can generally be divided into hard clay and light clay. In the manufacturing process of refractory materials, the former is mostly used as clinker after calcination; the latter has good plasticity after adding water, and is easy to sinter, and is mostly used as a binder.
The clay minerals mainly include kaolinite (Al2O3, 2SiO2, 2H2O), dickite (same composition as kaolinite, but different lattice constants), montmorillonite (Al2O3, 4SiO2, 6H2O) and mica minerals.
Clay refractory materials are abundant in raw materials, easy to process, and inexpensive, so they are more widely used than any other refractory materials. Chimneys and chimneys for high temperature furnaces, hot blast furnaces, ironmaking furnaces, ladle and casting systems as well as soaking furnaces, reheating furnaces, non-ferrous metal melting furnaces, kilns in the silicate and chemical industries, and all thermal equipment flues etc.
Technical parameters of Tunnel Kiln Clay Fire Blocks Thermal Insulation Basic Refractory Bricks Material
Item | Index | ||||||||
N-1 | N-2a | N-2b | N-3a | N-3b | N-4 | N-5 | N-6 | ||
refractoriness,℃≥ | 1570 | 1730 | 1730 | 1710 | 1710 | 1690 | 1670 | 1580 | |
Starting temperature of softening under load,℃≥ [0.2MPa x0.6%] | 1400 | 1350 | -- | 1320 | -- | 1300 | -- | -- | |
Rate of change of reburning line,% | 1400℃x2h | +0.1-0.4 | +0.1-0.5 | +0.2-0.5 | -- | -- | -- | -- | -- |
1350℃x2h | -- | -- | -- | +0.2-0.5 | +0.2-0.5 | +0.2-0.5 | +0.2-0.5 | ||
apparent porosity,%≤ | 22 | 26 | 24 | 24 | 26 | 24 | 26 | 28 | |
ambient compressive strength,MPa≥ | 30.0 | 20.0 | 25.0 | 20.0 | 15.0 | 20.0 | 15.0 | 15.0 |
Application of Refractory Bricks in Clay Brick Plant Red Clay Brick Production Line Fired Bricks