- Time:Aug 21, 2023
Unshaped refractory materials, also known as monolithic refractories, are categorized into several types based on their composition and application. The common classifications of unshaped refractory materials include:
1. Castables: Castables are mixtures of refractory aggregates, binders, and additives that are mixed with water to form a moldable slurry. They are widely used for various applications such as lining of furnaces, kilns, and other high-temperature equipment.
2. Ramming masses: Ramming masses are granular refractory materials that are used for lining applications by manual or mechanical ramming. They consist of refractory aggregates, binders, and sometimes additives. Ramming masses are commonly used in the construction of electric arc furnaces, induction furnaces, and other similar installations.
3. Plastic refractories: Plastic refractories are malleable materials that can be easily formed or shaped by hand. They are composed of refractory aggregates, plasticizers, and bonding agents. Plastic refractories are commonly used for repairing or patching existing refractory linings, as well as for forming complex shapes during initial installations.
4. Gunning mixes: Gunning mixes are dry or semi-dry refractory materials that are pneumatically applied using a gunning machine. They typically consist of refractory aggregates, binders, and additives. Gunning mixes are widely used for repairing and maintaining refractory linings in various high-temperature applications.
5. Spraying mixes: Spraying mixes are similar to gunning mixes but have finer particle sizes and are designed for spray application. They are commonly used for coating or insulating purposes, providing thermal insulation or protection against chemical attack.
6. Refractory mortars: Refractory mortars are specialized bonding agents used for joining refractory bricks or shapes together. They are typically composed of fine refractory powders, binders, and additives. Refractory mortars are crucial for creating strong and durable linings in various high-temperature applications.
These classifications are not exhaustive, and there may be variations or additional types of unshaped refractory materials available based on specific requirements and technological advancements.
