Description
What is Clay insulation brick like?
The Al2O3 content of light clay insulation brick is 30% to 46%. It is a lightweight refractory product, which is mainly composed of clay or light clinker. Usually it can be made into combustible by chemical or foam method, and finally form a multi-hollow structure. The bulk density of commonly used lightweight clay blocks is 0.75~1.20g/cm3, the compressive strength is 2.0~5.9Mpa, and the thermal conductivity is 0.221~0.442W/m.k (1350°C).
Other insulation bricks
Fire Clay Insulating Brick Technical Data
| Item | 1.0 | 2.0 | 3.0 |
| Al2O3 (%) | 38–40 | 38–40 | 38–40 |
| Fe2O3(%) | 4 | 44 | 1.2 |
| SiO2(%) | 55 | 55 | 55 |
| Bulk Density (g/cm3) | 0.6 | 0.8 | 1.0 |
| Apparent Porosity % | 70 | 60 | 55 |
| Cold Crushing Strength(Mpa) ≥ | 2.0 | 2.5 | 3.0 |
| Thermal Conductivity(W/m.k)(1000°C) | 0.33 | 0.60 | 0.45 |
| Max Service Temperature (°C) | 1200 | 1280 | 1300 |
From Wikipedia: Lightweight bricks (also called lightweight blocks)
Common specifications and dimensions of clay insulation blocks
- Standard size: 230mm×114mm×65mm
- Special size: no more than 2 concave corners, size ratio Max:Min6:1 or one acute angle of 50~70°
- Specific size: size ratio Max:Min8:1 or no more than 4 concave corners; or one acute angle of 30~50°
- Other common sizes: 240mm×115mm×90mm
Length: 290, 240, 190mm
Width: 240, 190, 180, 175, 140, 115mm
Height: 90mm
Clay insulation brick
How many degrees can a clay insulation brick with a unit weight of 1.7kg withstand?
General refractory temperature of Lightweight clay brick
Lightweight insulated clay bricks: refractory temperature is usually between 1580 and 1770℃.
Ordinary clay refractory bricks: refractory temperature is generally below 1200 degrees.
Specific example
The light clay refractory insulation bricks provided by Henan Lit Refractory Materials Co., Ltd. have a refractory temperature of up to 1550℃.
In summary, the refractory temperature of clay insulation blocks is generally between 1580 and 1770℃, but the refractory temperature of specific products may vary. For clay insulation bricks with a unit weight of 1.7kg, the refractory temperature should be close to the value within the above range.
Lightweight clay bricks packaging and delivery
Clay insulation bricks and clay bricks
| characteristic | Clay insulation brick | Clay Brick |
|---|---|---|
| Main Application | Mainly used for the insulation layer of kilns, playing the role of lightweight heat insulation | Generally used in high temperature industries, such as steel, cement, carbon, glass, ceramics and other industries, blast furnaces, hot blast furnaces, rotary kilns, glass kilns, etc., as refractory materials for furnace walls and furnace linings |
| Thermal properties | Has good thermal insulation and heat preservation performance | Resistant to rapid cooling and heating, high refractoriness |
| weight | Lightweight | High density |
| Manufacturing process | Using clay clinker or light clay and plastic clay as the main raw materials, it is produced by combustible method, and the firing temperature is 1250-1350℃ | The main raw material is bauxite, which has a high firing temperature, so it has high refractoriness and high density. |
| Application Scenario | Widely used in iron and steel making, chemical industry, cement and other industries, suitable for bathrooms, kitchens, bedrooms, exterior walls, etc. | Used for common basic buildings, such as houses, civil engineering, etc. |
What is the role of iron oxide in fire clay insulation brick?
In the production process of clay insulation bricks, iron oxide mainly comes from refractory raw materials, such as high-alumina bonded clay. This clay contains a certain amount of iron oxide, which helps to improve the strength and other physical properties of the brick. Specifically, the role of iron oxide in fire clay insulation brick includes:
- Enhancing the strength of bricks: Iron oxide particles play a reinforcing role in the brick blank, which can greatly improve the compressive strength of bricks.
- Affecting the color of bricks: During the baking process, the content of iron oxide and the baking atmosphere will affect the color of bricks. For example, when baked in an oxidizing atmosphere, the brick will appear red; while when baked in a reducing atmosphere, the brick may appear dark brown, black, purple or yellow, etc.
- Improving the water absorption of bricks: The right amount of iron oxide particles can improve the water absorption of clay bricks, making them more suitable for certain specific application scenarios.
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