Pro-Hurt

Refractory bricks LP

Refractory bricks LP

Insulating refractory bricks are made from high-purity refractory clays, with a gradually releasing proportion of alumina for products intended for use at higher temperatures, and carefully saturated with an organic filler which burns out during the manufacturing process to give a uniform controlled cell structure.

  • LP-23 LP-26 LP-28
    Classification

    temperature

    		 °C 1260 1430 1540
    Parameters measured at ambient conditions (23°C/50% RH)
    Density (ASTM C-134-84) kg/m3 480 800 890
    Flexural strength (ASTM C-93-84) Mpa 1 1,5 1,8
    Cold compressive strength (ASTM C-93-84) Mpa 1,2 1,6 2,1
    Performance at high temperatures
    Continuous linear shrinkage (ASTM C-210) after 24 hours at temperatures:
    Reversible thermal linear expansion (max) % 1230 °C: 0,2 1230 °C : 0,2 1510°C:  0,4
    Heat resistance % deformation after 90 min (ASTM C-16)
    1100°C  w 0.034 MPa (5psi) % 0,1 –
    1260°C  w 0.069 MPa (10psi) % 0,2 0,1
    1320°C  w 0.069 MPa (10psi) % 0,2
    1370°C  w 0.069 MPa (10psi) % –
    Thermal conductivity (ASTM C-182) at average temperatures:
    400°C W/m.K 0,11 0,23 0,29
    600°C W/m.K 0,13 0,26 0,31
    800°C W/m.K 0,16 0,28 0,33
    1000°C W/m.K 0,18 0,31 0,35
    1200°C W/m.K 0,33 0,36
    1400°C W/m.K  
    Specific heat at 1000°C kJ/kg.K 1,05 1,1 1,1
    Chemical composition (ta = trace amounts)) 
    Al2O3 % 37 58 67,1
    SiO2 % 44,4 39,1 31
    Fe2O3 % 0,7 0,7 0,6
    TiO2 % 1,2 0,1 0,1
    CaO % 15,2 0,1 0,1
    MgO % 0,3 0,2 0,1
    Na2O + K2O % 1,1 1,7 0,9

  • Brick sizes:

    Available in various sizes up to 650mm. Standard thickness is 64.76mm.