Refractory castable and plastic are both refractory materials. What is the difference between them? Refractory castables are a mixture of refractory aggregates, powders and binders. They are suitable for construction by pouring and vibration methods and are mostly used to build industrial furnace linings. Plastics are refractory materials with a certain viscosity and plasticity, which are made of refractory aggregates, clay powder, water and chemical binders in a certain proportion and are fully mixed into a mud-like or mud-like mass. They are constructed by ramming, vibration and other methods.
The difference between the two is introduced as follows
1. Different physical states and construction methods
Refractory castables are usually in the form of dry mixed particles. Before construction, water or liquid binder must be added to stir them into a fluid slurry, which is then poured or pumped into a mold and solidified after vibration compaction. Its construction relies on formwork support and is suitable for one-time pouring of large areas or complex structures. Refractory plastics are in the form of pastes or mud, contain plastic clay binders, and can be used directly without adding additional water. During construction, they are formed by ramming, extrusion or manual application. They have high plasticity and adhesion, and are especially suitable for special-shaped parts or local repairs.
2. Different thermal shock resistance
Refractory plastics can withstand drastic changes in furnace temperature and flame impact, and can be frequently stopped and heated without worrying about lining peeling. Its thermal shock resistance is 36 times that of ordinary castables. Therefore, heating furnaces with plastic linings allow rapid heating and cooling in daily use, while castables will cause peeling and other problems.
3. Different application scenarios
Castables are mostly used for the main structures of large kilns (such as rotary kiln cylinders and ladle linings), and are suitable for mechanized construction; plastics are often used in areas with concentrated thermal stress (such as boiler fire zones and flue corners), which are convenient for manual operation and quick repair.
Refractory castable and plastic have different raw materials, different construction methods, and different effects. You can choose according to different construction locations and construction requirements. For questions about refractory castables and plastics, please feel free to contact Haixin Refractory's customer service staff. We will provide the most professional solutions based on your questions.