The classification of firebrick goes back to its main raw material. Currently, manufacturers use many materials to produce refractory bricks, such as alumina silicate, silica, and zircon, which are usually used at low temperatures. In addition to these basic refractory materials, Including magnesia, dolomite and spinel, they are often combined with carbon and graphite and are used in very basic environments. They can withstand the highest operating temperatures but are subject to hydration and therefore require proper maintenance.
Neutral refractories, such as chromia and alumina refractories, are moderately priced due to their high melting temperatures. and the ability to be used in acidic and basic environments, they are used a lot by the metal industry, currently most of the refractory brick manufacturers use these materials.
but what is the refractory brick classification?
Usulat industrial firebricks are made in two ways: shaped and shapeless.
Until several years ago, almost all furnaces and similar industrial industries used shaped firebricks, but with the passage of time and progress The technology of amorphous refractory bricks opened their place in these industries.
refractory or refractory bricks formed
These types of bricks, as their name suggests, are pre-made and their shape is made according to a certain standard, and the properties of these bricks are almost the same.
Fireless Refractory Bricks
The structure of these types of bricks can be different according to the requests of the companies, and the forming and baking process at high temperature is eliminated. One of the advantages of amorphous refractories is its easy manufacturing process and no need for expensive equipment and machinery.
In general, amorphous firebrick includes the following advantages:
✅ no baking step
✅ prevention of energy loss
✅ reduction of fuel consumption
✅ reduction of environmental pollution
> ✅ reducing the production price and saving in the manufacturing process
alkaline brick
The materials of this type of brick are magnesite or Mgo, as the name of this type of brick indicates, alkaline brick consists of non-acidic oxides and has a very good resistance to high temperature and chemical wear. The type of brick is used in steel industries and furnaces.
Shamouti Refractory Brick
Due to the low price of making this type of brick, it is one of the most widely used firebricks: of course, the thermal conductivity and expansion of this type of brick is lower than other firebricks, but its reasonable price has led to the use of this type of brick in many industries. be used
Chamouti bricks are usually divided into 5 main categories:
Low Duty (Low Duty) Duty) ✅ Super Duty
silica refractory brick
This type of brick is made of siliceous refractory stones and about 93% of this brick is silicon oxide (SIO2). can withstand and because of its good resistance to heat and heat, it is possible to use it in many industries such as cement industry. Also, this type of brick has a much better performance against dust and soot. The only weakness of this brick is its lack of resistance to alkaline environments.
Acid refractory materials
✅ Normal refractory brick
✅ Silica brick
✅ Ganister brick
Basic refractory material
Carborundum brick
✅ Chrome magnesite brick
✅ Spinal brick
✅ Forstreet brick
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