Wear-resistant castables are based on the traditional ratio, adjust the particle size level, add different chemical admixtures to the castables, reduce the amount of cement, so as to improve the performance of the castable, and increase the medium temperature strength and load softening the temperature of the castable. The thermal conductivity of the castable improves the thermal shock stability of the castable. Wear-resistant castable has the characteristics of anti-seepage, anti-erosion, impact resistance, abrasion resistance, and good mechanical properties, so that the furnace body has a strong structural integrity, air tightness is better than brick kilns, and prolongs the service life of the kiln. It saves the cost of repairing the furnace and has significant economic benefits.
Wear-resistant castables and wear-resistant plastics are both amorphous materials, but the construction methods and combination methods of wear-resistant castables and wear-resistant plastics are different, and the raw materials used are also different.
The wear-resistant castable is compounded with pure calcium aluminate cement. During the construction process, methods such as adding water, pouring and pounding are adopted. Wear-resistant castables have the characteristics of impermeability, erosion resistance, impact resistance, and wear resistance. The construction thickness is 200mm. The thickness should not be less than 100mm, and it is used for the front and back arches of thermal kilns such as boilers and the back wall of the furnace.
The flame-retardant plastic is combined with phosphoric acid and has strong plasticity. The construction thickness should not exceed 100mm, generally 50-80mm. Burners for boilers, electric furnaces, furnace tops, and high-temperature furnaces.
Although the names of wear-resistant castables and wear-resistant plastics are similar, their use methods and locations are different. Due to its good plasticity, plastics are generally used for furnace repair and filling, while wear-resistant castables are generally used as lining materials in areas with severe wear.
Wear-resistant castable is a mixture of mud and water, which can be constructed by casting method. It can be demoulded after curing for 24 hours after casting, and it can be put into use after demoulding after reasonable curing and baking. The refractory plastic is made of phosphoric acid adhesive, and the material is retained for more than 10 hours by tamping construction.
Therefore, the names of wear-resistant castables and wear-resistant plastics are not only different, but also different in combination mode, use method, construction thickness, use location, baking method, etc.