Insulating Fire Brick

Mullite bricks refer to high-alumina refractory materials with mullite as the main crystal phase. Generally, the alumina content is between 65% and 75%. In addition to mullite, the mineral composition contains a small amount of glass phase and cristobalite in those with lower alumina content; a small amount of corundum in those with higher alumina content. Mainly used in hot blast furnace tops, blast furnace shafts and bottoms, glass melting furnace regenerators, ceramic sintering kilns, dead-end furnace linings in petroleum cracking systems, etc.

Bubble alumina brick is a type of lightweight refractory brick that is made from high-purity alumina aggregates in combination with a small amount of additives. It is characterized by its unique structure, which consists of numerous sealed spherical pores or bubbles within the brick matrix. These bubbles are formed during the manufacturing process, giving the brick its distinctive lightweight and insulating properties.

High alumina insulation brick is a type of refractory brick that is made primarily from high-purity alumina, typically with an alumina content of 48% to 95%. These bricks are known for their excellent insulating properties, high-temperature resistance, and low thermal conductivity. They are widely used in various industrial applications where thermal insulation is critical.

It is made of high bauxite, industrial alumina and refractory clay, with charcoal or coke fine particles as reducing agent, and is made by reduction fusion after molding. Its Al2O3 content is about 72-74%, the apparent porosity is about 17%, the volume density is 2.58g/cm3, the compressive strength at room temperature is about 39.2Mpa, and the softening temperature under load of 0.2Mpa is 1620-1660℃. Compared with sintered mullite bricks, it has better thermal shock resistance, low thermal expansion coefficient, and strong resistance to glass liquid corrosion.

A honeycomb ceramic regenerator is a type of heat exchange device used in certain combustion systems, such as industrial furnaces and heating equipment. It is designed to recover heat from flue gases and transfer it to the incoming combustion air, improving energy efficiency and reducing fuel consumption.

Baffle bricks are a type of refractory brick that are used in various industrial heating equipment, particularly in furnaces and kilns. They are typically installed as baffles or partitions within the equipment to control the flow and direction of heat, combustion gases, and materials being processed. Baffle bricks are designed to withstand high temperatures, thermal cycling, and chemical attacks. They are usually made from high-quality fireclay or high alumina materials, which provide good thermal insulation, high refractoriness, and resistance to abrasion and corrosion.

Fire Clay Insulation Brick generally have an Al2O3 content of over 40% and an Fe2O3 content less than 2.0-2.5%. The raw material mixture consists of 65-85% clinker and 35-15% bonding clay. The crushed bonding clay and finely ground clinker are mixed and milled together, then formed under high pressure to produce a semi-dry mud. This mixture is fired at around 1400°C, resulting in good performance. Clay bricks exhibit a weak acidic nature at high temperatures and have a slightly lower resistance to alkaline slag erosion, but this ability improves with higher Al2O3 content. They have better thermal stability compared to silica bricks and magnesia bricks.

Lightweight silica insulation brick is a type of refractory brick used for high-temperature insulation applications. It is made from high-purity silica combined with a lightweight aggregate and a binder to create a lightweight and thermally efficient material. The lightweight aggregate used in the production of silica insulation bricks helps to reduce the density of the material, making it lighter and easier to handle. The aggregate can vary but commonly includes materials such as expanded perlite, vermiculite, or lightweight clay. The choice of aggregate depends on factors such as desired insulation properties and application requirements.