Wear-resistant plastics are made of refractory aggregates and powders, raw clay, chemical composite binders and admixtures. They have good plasticity after being mixed, extruded into bricks, packaged and stored for a certain period of time, and can be tamped construction. According to the types of refractory aggregates, Wear-resistant can be divided into clay, high alumina, mullite, corundum, chromium, silicon carbide, and refractory plastics containing zirconium.
The wear-resistant plastics are generally mullite, corundum, silicon carbide, etc. The plastic has good thermal shock resistance and is easy to construct. It is suitable for various heating furnaces, soaking furnaces, annealing furnaces, hot blast furnaces, etc., and can also be used for small electric arc furnace covers, high temperature furnaces and other parts.
Wear-resistant castables are mixtures composed of refractory aggregates, powders, and binders. After adding water or other liquids, they are suitable for casting and vibration construction. Wear-resistant series castables generally include high alumina, mullite, corundum, Series of wear-resistant castables such as silicon carbide. Wear-resistant castables have the characteristics of anti-permeability, corrosion resistance, impact resistance, abrasion resistance, and good mechanical properties. They are widely used in power station boilers and other thermal kiln front and back arches, furnace roofs, and tail furnace walls.
The two wear-resistant series of refractory materials are called similarly, and the positions used are actually the same. The only difference is their function. Due to its good plasticity, plastics are generally used for kiln repair and filling. Wear-resistant castables are generally used in areas with severe wear as lining materials.
The difference between them
Most of the wear-resistant castables are mixed with water to form a mud that can be constructed by the pouring method. After pouring and molding, it can be demoulded after a period of curing, and then it can be put into baking after proper time of natural curing. Refractory plastics need to be combined with binders and constructed by tamping. Commonly used binder classifications are: clay combined with plastic, phosphoric acid combined with plastic, aluminum sulfate combined with plastic, etc.