Insulating firebricks

INSULATING FIREBRICK KEYWORD: insulating firebrick , insulation firebrick, insulating brick, heat insulation, refractory brick for oven.   North Refractories Co.LTD Insulating Firebrick Branch Specially produce ranges of high temperature insulating fire brick(IFB) with a application temperatures from 2,300°F (1,260°C) to 3,200°F (1,760°C). NRCL produce typical grade bricks and meanwhile accept orders for specific thermal and physical requirements. Made from high purity refractory clay and other ceramic raw materials by mixing, press-forming, drying, sintering and machining. The IFB 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. Insulating firebrick can be applied 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 constructions.   Advantages Low Thermal Conductivity The light weight and low thermal conductivity of NR IFB make it possible more thinner furnace walls in constructions, more efficient and lower cost with energy saved. High Strength The high compressive strength of NR IFB maintains a self-supporting stable structures at elevated temperatures. IFB could be used together with dense fire bricks to improve the strength of whole construction. Low Heat StorageLow heat storage results in a more fewer fuels will be used during a rapid cooling and heating operation than the dense bricks. High thermal shock resistance NR IFB has a good performance in preventing spalling which is adversely for the life span of furnace linings.High Purity NR IFB is low in impurities and because of this they will enhance the refractory performance in many furnace constructions with a controlled atmosphere. Precise Dimensions NR Insulating Fire Brick are machined to precise dimensions which could make the refractory linings more quickly, exactly and easily , the more precise the less heat loss through the joints.   General Applications NR IFB is recommended to use as primary hot face refractory linings or as the back-up insulation behind other dense refractory materials layer in furnaces, flues, kilns and similar high temperature industrial facility.More information of product data sheet is available from the download center. All are in PDF format. General products   Dimension   Length mm Width  mm Thickness mm 230 114  64 230 114  76 250 125  64 250 125  76   Grade: Insulating Fire Brick 2300 Degrees F   Insulating Fire Brick 2600 Degrees F    Insulating Fire Brick 2800 Degrees F  Insulating Fire Brick 3000 Degrees F  Insulating Fire Brick 3200 Degrees F     Meeting international industry standards with more competitive market price If you need special dimension, custom cutting service is available. Just contact us by phone or by email. .   Quality and Service Endurances .    ISO Certified - Our insulating firebricks are certified. Quality - Each production lot is evaluated by an independent laboratory prior to shipment. Precise Dimensions - Our insulating firebricks are made within tolerance for fast and efficient installation. Stock Availability - We stock most grades and straights most often. Emergency Service - We are fully equipped to provide machining services for emergency orders.     Item \ Grade                     NR23        NR26        NR28        NR30         NR32 Classification Temperature (?)=    1260         1425          1538         1550         1600 Max Working Temperature (?)=    1100         1300          1400         1450        1500 A l 2 O 3 %  =                   40             54            62           74          80 S iO 2 %    =                   58             44            36            24         18 Fe2 O 3 % =                     1             0.8             0.7           0.6        0.5 CaO % =                       0.5             0.4             0.3           0.2         0.1 Density k g / m 3                 550             800            900           1000      1100 Thermal Conductivity  W/(m. K) 400 ° C                      0.20            0.26            0.29           0.31         0.34 600 ° C                    0.24             0.29            0.32              0.34        0.39 800 ° C                    0.28             0.32            0.35              0.38        0.42 Cold Crushing Strength Mpa    1.1              1.6             2.0               2.1         2.2 Modules Of Rupture Mpa       1.0              1.2            1.5               1.8         2.0 Thermal Expansion at 1000 ? % 0.46             0.47            0.48             0.48       0.48 Reheat Shrinkage ?*8hr %    1300 ° C-0.2     1400 ° C-0.4     1500 ° C-0.4           1550 ° C-0.38 1600 ° C-0.38   The above is our regular typical products, special products could be made on requests.