Non Metallic Refractory Insulating Fire Bricks Burning Resistant High Refractori

Product Specification

Refractory bricks/refractory materials/burning resistance/high temperature resistance/1750℃/different shapes

Brief Overview

Refractory bricks are inorganic non-metallic products with a refractoriness of not less than 1750℃. They are a kind of brick that can withstand combustion and high temperatures. They are usually made of refractory raw materials through batching, molding and roasting. They are suitable for use as masonry linings in a variety of high-temperature kilns. Their main function is to protect the steel structure of the furnace shell from being melted by high temperatures. Refractory bricks can be made into refractory bricks for different purposes according to the raw materials used, and refractory bricks of different shapes can be made according to the parts of use.

Composition

Refractory materials are generally divided into two types, namely amorphous refractory materials and shaped refractory materials.

1. Amorphous refractory materials are also called castables. They are mixed powder particles composed of multiple aggregates or aggregates and one or more adhesives. When used, they must be mixed with one or more liquids and stirred evenly, and have strong fluidity.

2. Shaped refractory materials generally refer to refractory bricks, which have standard shapes and can also be temporarily processed when cutting as needed.

Characteristics

1. Chemical composition: The main components of refractory bricks determine the quality and refractoriness of the bricks.

2. Bulk density: The larger the bulk density, the better the density of the refractory bricks, the higher the strength, and the greater the thermal conductivity; conversely, the smaller the density, the lower the strength, and the better the thermal insulation effect.

3. Apparent porosity: Generally, the apparent porosity of high-density refractory bricks is 3%-10%, that of ordinary dense refractory bricks is 20%-30%, and that of lightweight refractory bricks is 45%-48%.

4. Load softening temperature: It is the temperature at which refractory bricks deform under constant compressive load and heating conditions at a certain heating rate. It indicates the resistance of refractory materials to the simultaneous action of high temperature and load.

5. Thermal shock resistance: Refractory bricks can withstand extremely hot and cold temperature changes without being destroyed. For example, clay bricks can be used for the storage and transportation of molten iron in molten iron tanks.

6. Compressive strength: The limit load that refractory bricks can withstand per unit area without being destroyed at a certain temperature (generally at room temperature).

7. Flexural strength: refers to the ability of refractory bricks to withstand shear pressure, which is generally achievable for refractory bricks and is generally much smaller than compressive strength.

8. Reburning line change rate: The residual shrinkage or expansion of the length of the brick body after the refractory brick is heated to the specified temperature and kept warm for a certain period of time and cooled to room temperature. The + sign indicates expansion and the - sign indicates shrinkage. The line change rate is an aspect of the high-temperature volume stability of refractory bricks. If the shrinkage is too large, the refractory bricks will fall off.

9. The characteristics of refractory bricks are directly related to the content of the raw material components of refractory bricks. The characteristics of refractory bricks vary with the content of the raw material components of refractory bricks. The refractory bricks have different characteristics in different use environments.

Application

1. Refractory bricks are inorganic non-metallic products with a refractoriness of not less than 1750℃. They are suitable for use as masonry linings in a variety of high-temperature kilns. Their main function is to protect the steel structure of the furnace shell from being melted by high temperatures.

2. Refractory bricks have long been used in the ceramic industry to build kilns.

3. Because of its excellent fire resistance, it was later used in industry and home life. Many people use refractory bricks to build villas, which can greatly improve the fire resistance.

4. Refractory bricks are most commonly used in various thermal equipment and high-temperature containers as structural materials and linings to resist high temperatures.

5. In the iron and steel metallurgical industry, coke ovens are mainly composed of refractory materials. Blast furnaces and hot blast furnaces for ironmaking, various steelmaking furnaces, soaking furnaces, heating furnaces, etc. all require various refractory materials that meet the requirements.