In the past decades, firebrick was used in places such as covering industrial furnaces or fireplaces due to its high thermal resistance. Now, in this article, we want to explain to you things such as what is firebrick and its use along with the types of firebrick.
Today, however, the use of firebrick has gone beyond furnaces and has been welcomed as one of the most widely used building materials in other industrial and architectural cases.In fact, this type of brick is different from normal brick models and by baking a mixture based on clay (fire clay) in the oven, it will find high thermal resistance (1500 degrees Celsius) against mechanical, chemical or thermal stresses.

What is firebrick?

Now, before we get acquainted with the types of refractory bricks, it is better. Let’s get to know the meaning of firebrick; Firebrick is a brick. which has a high resistance to heat, cold and weather changes, and due to the complete baking of the brick, it also has high strength. In scientific definitions, any brick that has a heat resistance above 950 degrees Celsius is called refractory brick; This thermal resistance is usually 1350 degrees Celsius and its maximum is 3500 degrees Celsius.

Technical specifications of refractory bricks comprehensively

Their color starts from white and includes yellow, brown and black colors.
Their dimensions are usually 6 X 11.5 X 23 for the furnace and 7 X 32 X 2.5 for the facade.
Each firebrick also weighs 3.5 kg and is 1.1 kg in the dimensions of the facade.
The compressive strength (bearing capacity) of firebrick is between 200 and 220 kg/cm2.
The water absorption percentage of refractory bricks varies from 5 to 15 percent.
It has antacid and normal types.

Types of refractory bricks based on the type of soil and ingredients

There are different types of refractory bricks based on the ingredients and the type of soil produced; Of course, the types of refractory bricks are not limited to these, and there are many types available in the Iranian market. After introducing the types of fire bricks, we have also introduced the types of refractory bricks available in the market.

In general, the types of this model of bricks, which we have categorized based on the type of soil, are divided into categories such as anti-acid firebrick, magnesite firebrick and bauxite firebrick (high grade alumina).

In the following, we will briefly explain about each of the bricks; Stay with us

Anti-acid refractory brick

One of the models of refractory bricks is the anti-acid refractory brick, which has high resistance to the acidic effects of chemicals or weather; In general, ordinary bricks are made from fireclay, and if we want to make it resistant to acid, more silica should be added than fireclay, which may be up to 97% of the total. If you want to use this brick for binding purposes, you should add 1-2% lime to it; Anti-acid bricks are fired at high and heavy temperatures

bauxite refractory brick

Bauxite refractory brick can be mentioned among other firebrick models. Bauxite is a natural and heterogeneous material. which is mainly composed of one or more minerals. Of course, Bauxite is a metal mineral that is used as an industrial mineral. Bricks produced with high-grade alumina are known as bauxite firebricks, which contain a large amount of alumina. While chromite bricks contain chromium, iron oxide, silica and iron ore in different proportions

Magnesite refractory brick

Magnesite bricks are one of the types of refractory bricks based on the type of soil. which show good resistance against corrosion and chemicals. Magnesite refractory bricks contain a large amount of magnesium, and one of the main ingredients in the production of this type of brick is lime.

Types of magnesite bricks include magnesite brick, magnesium carbon brick, magnesium chrome brick, etc.

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