Why Are Insulating Bricks Capable Of Withstanding High Temperatures

Insulating bricks are non-metallic inorganic materials that have a refractoriness of at least 1580°C.

They are the building blocks of high-temperature technologies and structural components of thermal equipment like brick kilns.

They are also utilized in the production of specific high-temperature containers and parts, as well as in unique functions.

To be used successful under high-temperature action, insulating bricks must have good structure, thermal properties, mechanical properties, chemical corrosion resistance, and load softening temperature.

They must withstand a variety of chemical and physical changes while meeting the needs of thermal components and equipment.

Therefore, high-temperature insulating bricks are ideal to achieve a successful high-temperature project.

Reasons for high-temperature capacity

1. Belongs to the class of inorganic nonmetallic materials

The three major materials are metal materials, organic polymer materials, and inorganic non-metallic materials.

Inorganic sub-metallic insulating brick materials have good compressive strength, hardness, temperature resistance, and corrosion resistance.

Ceramics are also corrosion-resistant and refractory materials. Thermal and heat insulation possess superior properties that are unmatched by metal and polymer materials.

2. Based on raw material analysis

Natural ores such as bauxite, silica, magnesite, and other raw materials with diverse qualities, such as aluminum-silicon bricks, and siliceous insulating bricks are commonly utilized in insulating bricks production.

When bauxite is used as a raw material to make aluminum-silicon bricks, the predominant component is alumina, which is hydrated alumina with impurities.

Because high bauxite clinker offers a refractoriness of about 1780°C, great chemical stability, and good physical qualities, the main function is to smelt aluminum and create insulating brick materials.

Silica, the major component of which is SiO2, is used as the raw material for creating siliceous insulating bricks.

The basic material for silica bricks is natural silica, plus a sufficient amount of mineralizer to foster the process of converting quartz in the green body to tridymite.

Slowly fired in a decreasing environment at about 1350-1430°C. Has great thermal resistance.

Magnesite is the primary raw material used in the production of magnesia refractory bricks. MgO is its primary component.

Magnesium oxide offers excellent fire and insulating qualities. Magnesium insulating bricks are alkaline bricks that can withstand alkaline slag erosion but not acid slag erosion.

Although the refractoriness is greater than 2000°C, the softening point is just 1500°C, and thermal shock is steady.

3. Sintering and forming

Refractory bricks are made via a mineral compound crushing-raw material mixing machine to form high-temperature sintering to generate a product that can withstand high temperatures.

The green body's sintering temperature after the high-temperature tunnel furnace will surpass its product load.

The softening temperature usually is more than 1500°C. The refractoriness is more than 1770°C.

Higher temperature resistance is preferable. Refractory bricks are mostly used to line cement rotary furnaces, glass-melting furnaces, steel-making electric furnaces, and so on.

Do you require a heat-resistant insulating brick?

If you would like to buy firebricks for personal or commercial usage, make sure you select the high-temperature insulating bricks. Kindly contact us if you want to learn more.