Overview About Refractory Fireclay Brick

May 11, 2023

In the ceramics industry, fireclays are clays that can withstand high temperatures without deforming or melting. To produce refractory bricks for high-temperature applications, fireclay refractory bricks are manufactured using ingredients such as unfired refractory bond clay, fireclays (chamotte), fired refractory clay, or similar grog ingredients. Fireclay refractory bricks consist of 18-44% alumina (Al2O3) and 50-80% silica (SiO2) as their main constituents.

A diverse selection of clays and production methods allows for the creation of a broad assortment of bricks appropriate for particular purposes. The presence of mineral mullite, which develops during the burning process and has notable traits of high refractoriness and low thermal expansion, plays a vital role in enhancing the usefulness of fireclay refractory bricks.

Raw Materials For Fireclay Refractory Bricks

Refractory fire clay brick is primarily composed of hydrated aluminum silicates, along with small quantities of other minerals. The standard formula for aluminum silicates, which consists of 39.5% alumina, 46.5% silica, and 14% water (H2O), is expressed as Al2O3.2SiO2.2H2O.

Kaolinite is the most prevalent member of this category. Upon subjecting the mixed water to high temperatures, the resultant residue comprises 45.9% alumina and 54.1% silica theoretically.

Trace amounts of other components such as iron, calcium, magnesium, titanium, sodium, potassium, lithium, and free silica are included in even the cleanest clays.

The overall amount should only contain a maximum of 5% to 6% of these fluxing agents that lower the melting point. TiO2 used to be grouped with alumina, but it is not currently classified as a fluxing agent.

The Quality Fire Clay Brick From Laurel Group

Our glazed thin Brick is favored by designers and architects for its unique texture, versatility, and scalability, while also being as durable as it is timeless. Our brick tile is available in two sizes: the classic 8*2.5 inch and the Norman 11.5*2.5 inch. There are options for glazed edge and corner trim that can give your installation a finished look. Now, we recommand the SK32 fire brick below:

SK32 fire brick is a type of refractory brick used in high temperature applications like industrial furnaces, kilns, incinerators, etc. Some key points about SK32 fire brick.

SK32 classification indicates it has a compressive strength of 32 kg/cm2, which is considered medium strength. Higher strength fire bricks are also available.

SK32 bricks are used in places where temperatures range from 1,000°C to 1,400°C. They are not suitable for areas with localized very high temperatures above 1,600°C.