- Time:Jul 29, 2023
In cement kilns, several types of bricks are commonly used for different sections:
1. Magnesia chrome bricks: These bricks have a high refractoriness and excellent resistance to alkali attack. They are often used in the burning zone of cement kilns where temperatures are the highest.
2. High alumina bricks: High-alumina bricks, with a high alumina content (typically above 70%), are widely used in the transition zone and cooling zone of cement kilns. They offer good thermal shock resistance and can withstand moderate alkali attack.
3. Alumina-silica bricks: These bricks have a lower alumina content compared to high-alumina bricks. They are suitable for areas with lower temperatures and less severe chemical environments, such as the preheater and tertiary air ducts.
4. Insulating bricks: Insulating bricks, made from lightweight materials like vermiculite, perlite, or diatomaceous earth, are used in areas requiring thermal insulation, such as the kiln hood and cooler walls. They help reduce heat loss and improve energy efficiency.
5. Basic bricks: Basic bricks, typically magnesia-based, are used in certain areas of the cement kiln, particularly in the lower part of the preheater tower. They provide resistance to alkali attack and can withstand higher temperatures.
Zhenjin refractory basic refractory bricks include magnesia bricks, magnesia-alumina spinel bricks, magnesia-iron spinel bricks, high-strength alkali-resistant and so on.
It is important to note that the selection of bricks depends on specific operating conditions, including temperature, chemical composition of the raw materials, and the presence of alkalis or sulfates. The choice of bricks should consider the requirements of each section and their resistance to thermal cycling, chemical corrosion, and mechanical stresses experienced in cement kiln operations.
