توضیحات
Insulation Firebricks
General Description:
Insulation Firebricks (IFB) are light weight refractory product with low thermal conductivity. These products can be widely used as refractory thermal_ insulation layer in various high temperature industrial units which improves energy saving and thermal efficiency. There are different grades of insulating firebricks for maximum service temperature up to 1650°c. These products are designed according- to ASTM C155 classification and other special requirements.
Manufacturing process and features:
These products are formulated from different high purity and low iron oxide content main raw materials such as clays, alumina silicates, alumina, and organic pore formers, which are processed with high temperature sintering. This manufacturing process enables to production of high quality product with stable structural and phase characteristics and homogenous porous microstructure which provides reliable thermal insulation performance and long term service life.
These products are characterized by following technical properties:
High purity, low alkali flux and iron oxide content, low thermal shrinkage and high dimensional stability, high thermal stability, low thermal conductivity, high compression and flexural strength, good thermal shock and spalling resistance, good resistance to chemical corrosion in reducing atmospheres (carbon monoxide and etc.) and precise dimensions.
Typical Applications:
Insulation Firebricks can be widely used in various high temperature industrial units, as thermal preservation layer, such as hot face insulation lining., or back-up insulation lining and in combination with other refractory products.These products can be used in various heat processing units of following industrial applications:
• chemical & petrochemical (olefin, methanol) ferrous metals (iron ore pelletizing, iron ore direct reduction, steel, cast iron) • non-ferrous metals (aluminum, copper) ▪ ceramic (tile„ porcelain, glass, cement)
Geometrical Dimensions:
These products are cut to precise dimensions and available with the following sizes. Also other sizes can be produced to achieve the different arches shapes. Precise dimensional tolerance leads to tight insulation refractory lining, which resulting in lower heat loss through the joints. Suspended roof bricks with dimensions of (230/230/130-150) and (230/260/130-150) mm can be produced with jointing of bricks with refractory mortars and machining, for applications such as
ceramic kiln
| Dimensions | Length | Width | Thickness | |
| Values (mm) |
230 | 114 | 64-76 | |
| 230 | 152-172-178 | 76 | ||
| 250 | 124 | 64-76 | ||
| Main Properties | G23 | G26 | G28 | G30 |
| Max. Service Temp. [°C] | 1260 | 1430 | 1540 | 1650 |
| Bulk Density, [gr/cm3], ASTM C-134 | 0.6 | 0.8 | 0.9 | 1.05 |
| Cold Crushing Strength, [kg/cm2], ASTM C-133 | 12 | 18 | 25 | 30 |
| Permanent Linear Shrinkage, [%] after 24 hrs soaking, ASTM C-210 | 0.2 [1230] |
0.75 [1400] |
0.75 [1510] |
1.0 [1620] |
| Thermal Conductivity, [W/m.K], ASTM C-182 | ||||
| 600 | 0.19 | 0.28 | 0.34 | 0.42 |
| 800 | 0.21 | 0.33 | 0.37 | 0.45 |
| 1000 | 0.23 | 0.35 | 0.39 | 0.47 |
| Chemical Analysis, [%] | ||||
| Al2O3 | ≥ 38 | ≥ 52 | ≥ 65 | ≥ 70 |
| SiO2 | ≤ 57 | ≤ 43 | ≤ 31 | ≤ 26 |
| Fe2O3 | ≤ 1 | ≤ 1 | ≤ 1 | ≤ 1 |
| others | ≤ 4 | ≤ 4 | ≤ 3 | ≤ 3 |
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