Cement

Refractory linings in the cement industry play an essential role in the production and quality of cement.

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    References

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    These are the main uses and considerations of refractories in the cement industry:
    • Rotary kilns: One of the most critical equipment in cement industry is the rotary kiln. Inside, the raw mix is heated to temperatures over of 1,400 °C to produce clinker, the main component of cement. Refractory materials protect the kiln structure from these high temperatures and from corrosion caused by the gases and materials inside the kiln. The rotary kiln has different areas depending on the temperature and the chemical reactions that occur in them. Each of them requires a specific type of refractory adapted to the particular conditions.
    • Corrosion Resistance: The gases and materials in the kiln can be corrosive. Refractories must resist the action of these corrosive agents, especially in the sintering area, where clinker is formed and can attack the lining.
    • Thermal Insulation: Refractories provide essential thermal insulation, which helps to keep heat inside the kiln. This is crucial for energy efficiency and cost reduction in cement production.
    • Thermal Shock Resistance: During furnace operation, sudden temperature changes can occur, especially during start-up and shut-down. Refractories must be able to withstand these changes without losing their properties.
    • Service life: The service life of refractories is an important consideration. A long-lasting refractory lining reduces the need for frequent production shut-down, which can have a direct impact on costs.
    • Cyclones, calciners, smoke chamber, kiln hood and coolers: In addition to the kiln, there are other equipment that may require refractory linings to protect them from heat and corrosion.

    Refractory linings are therefore essential for the efficient and safe operation of kilns and other equipment in the cement industry. They protect equipment from high temperatures, corrosion and ensure adequate thermal insulation, contributing to the efficient and high quality production of cement.