The difference between shaped refractory materials and unshaped refractory materials

2024-05-28 14:18:16
There are significant differences between shaped refractory materials and unshaped refractory materials in many aspects. The following is a detailed comparison:

Definition and characteristics:
Shaped refractory material: It has a fixed shape and size. It is generally made by pouring slurry into a mold, compressing it, and then going through steps such as drying and sintering. This material is hard, dense, lightweight, and will not deform or shift when used at high temperatures, making it suitable for precise positioning at high temperatures.
Amorphous refractory materials: also known as bulk refractory materials, are composed of refractory aggregates with a certain particle size gradation, powders, binders, and admixtures. They have no fixed shape and can be made into slurry, paste and loose shapes, and have good plasticity and castability.
Shaped refractory materials: The original refractory materials of fixed shapes and sizes are mainly manufactured by adding water, extrusion, pressing, etc., and then undergo special processes such as drying and sintering to become the final high-temperature refractory materials.
Unshaped refractory materials: The manufacturing process is relatively simple and can be produced only through the preparation of granular and powdery materials and the kneading process of the mixture. It can be prepared by various methods such as ramming molding, vibration molding and injection molding.
Performance and application:
Shaped refractory materials: have high fire resistance and mechanical strength, and can generally withstand high temperature environments above 1000°C. Due to its unique high temperature resistance and corrosion resistance, it is widely used in high temperature furnaces, steel smelting, cement production, chemical industry and other fields.
Unshaped refractory materials: Although their fire resistance and mechanical strength are low, they are better than refractory bricks in some thermal equipment due to their simple process, energy saving, low cost, and ease of mechanized construction. It is often used for lining thermal equipment, and can also be used to repair refractory brick masonry or overall structures when they are partially damaged.
Shape and size:
Shaped refractory materials: have fixed shapes and sizes, such as bricks, plates, tubes, etc.
Unshaped refractory materials: The shape can be designed and cast according to needs, and the size is not limited.
In summary, there are significant differences between shaped refractory materials and unshaped refractory materials in terms of definition, characteristics, preparation methods, performance and applications, as well as shape and size. The choice of which material to use depends on the specific application and needs.
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