Refractory materials resist heat very stubbornly. But the whole point of using them is that they must not disintegrate while in use. The big issue in this case is the role of chemical composition in determining the right refractory materials that suits your needs. Here are the three different types of refractories based on their chemical composition.
At FibreCast we offer quality products with in-depth technical advice. Here is what you need to know about refractory materials:
- Acidic refractories: the common acidic materials used under this category include the alumina and silica. Given their acidity, they are very resistant to acidic liquids or solutions but not to alkali or base since they can degrade. The resistance of acidic refractory materials, however, has limitations. Highly acidic compounds such as hydrofluoric acid and fluorinated gases can be so fatal and disintegrate them.
- Basic refractories: basic materials such as magnesia, chrome-magnesia and dolomite are commonly used under this type. Needless to say, they are resistant to bases but not to acids. Of all the basic refractory materials, magnesite is mostly used in furnaces.
- Neutral refractories: these materials are highly demanded because they can resist both acids and bases. The most common neutral refractories include chrome, alumina and carbon.
Another essential thing that has to be considered in refractories is the anchorage. It needs to be held securely in place and has to have the same ability to resist heat while keeping its hold under extreme conditions.
Drying stress can also affect the condition of refractory materials. It is therefore very important that maximum operating temperature of equipment be strictly followed.
We specialize in refractory materials and equipment at FibreCast, ensuring you receive the best materials for any given application. From refractories to anchorage and operating temperature parameters, nobody understands the industry better than we do.