Insulating Firebrick (JM23 JM26 JM28 JM30)

GENERAL INFORMATION:

NEWYOEK insulating firebricks are classified under temperature between 1300C and 1700C, manufactured from high purity alumina clay by mixing, press-forming, drying, sintering and machining. Bricks contain carefully-graded organic fillers which are burned out during sintering to give a uniform controllable pore structure. This technique makes product feature low thermal conductivity and excellent heat insulation

NEWYOEK insulating firebrick can be used as a hot face lining directly exposed to the heat or as a backup insulation layer in iron and steel mills, non ferrous foundries, petrochemical, ceramic, glass, cement and oil fired electric power generating plants.

ADVANTAGES:

Light weight and low thermal conductivity allows thinner furnace walls
Maintain stable structural strength throughout ambient to maximum service temperature
Low heat storage results in rapid cooling and heating operation
Low iron and impurities to enhance reducing atmosphere
High thermal shock resistance in preventing spalling
Non standard sizes and shapes are available upon request

APPLICATIONS:

Ceramic shuttle kilns
Metal heat treatment furnaces Steel billet reheating furnaces Oil refinery heaters
Laboratory furnaces

ATTACHED TECHNICALDATA

ITEM NAME UNIT GJM30 GJM28
Physical Properties:
Classification Temperature F 3000 2600
Bulk Density kg/cm³ ≤ 1.0 ≤ 0.8
C. C. R. Strength MPa ≥ 3 ≥ 2.5
Reheating Linear Change % ≤ 0.9 (1550C, 12 h) ≤ 0.8 (1510C, 12 h)
Chemical Analysis:
Al2O3 % ≥ 75 ≥ 65
Fe2O3 % ≤ 0.5 ≤ 0.6
Thermal Conductivity:
800C w/mk ≤ 0.39 ≤ 0.37
1000C w/mk ≤ 0.43 ≤ 0.41
1200C w/mk ≤ 0.48 ≤ 0.46
ITEM NAME UNIT GJM23 GJM26
Physical Properties:
Classification Temperature F 2300 2600
Bulk Density kg/cm³ ≤ 0.52 ≤ 0.9
C. C. R. Strength MPa ≥ 1.2 ≥ 1.8
Reheating Linear Change % ≤ 0.5 (1550C, 12 h) ≤ 0.7 (1410C, 12 h)
Chemical Analysis:
Al2O3 % ≥ 45 ≥ 55
Fe2O3 % ≤ 1.0 ≤ 0.7
Thermal Conductivity:
800C w/mk ≤ 0.18 ≤ 0.35
1000C w/mk ≤ 0.20 ≤ 0.39
1200C w/mk --- ≤ 0.43