About Refractories

Did you know that everyday life would be unimaginable without refractory materials?

What is the purpose of refractory products?

For example, imagine a car.

These are STEEL, COPPER, ALUMINIUM, GLASS AND PLASTICS. All these materials are produced at extremely high temperatures.

To illustrate, let’s give an example of steel production.

Raw iron is melted in a blast furnace and further transformed into steel during thermal processes at temperatures up to 1700 ° C. The interior of the melting furnace must be lined to prevent its metal shell from melting. This lining is made of refractory materials, which are similarly used for the industrial production of glass, copper, aluminium and plastics.

How do refractory materials withstand such extreme temperatures, what are they made of and how are they made?

The basic component consists of various rocks such as magnesite, clay, quartz, etc. Refractory rocks can be mined either on surface or in quarries. These rocks are crushed and then fired in special furnaces at a high temperature, depending on the type of rock, e.g. 1800°C for magnesite, which gives them refractory properties.

The material thus obtained is mixed with other binders (e.g. clay) and shaped mainly by hydraulic presses into various shapes and sizes with a pressure of up to 3200 tons (that is, the weight of, for example, 80 fully loaded trucks).

Depending on the application, the shaped products are further dried at 350 ° C or fired in tunnel kilns at temperatures up to 1800 ° C to obtain specific chemical and mechanical properties.

How are the finished products used then?

The products are installed by specialized construction companies in thermal aggregates or melting furnaces of our customers.

rotační pec

How long do refractory materials withstand such extreme temperatures in operation?

In the steel industry, depending on the application, it lasts from a few hours to many years. For example, in the glass industry, they can last up to 15 years. In the coking industry, it can reach a service life of up to 30 years with regular maintenance. Then the linings are demolished and part of the material is recycled for further production.

Our industry consists of a comprehensive cycle of processes from raw material extraction, processing, production of refractory products, their installation, repair of aggregates to their disassembly and recycling.

Refractory materials keep primary industrial production running 24 hours a day and are irreplaceable in the production of products that we use every day.