The success of ceramic foundry sand affects all aspects of the casting field. Its application is becoming more extensive, enabling us to control product quality more efficiently and accurately and produce high-quality parts in line with environmental protection. The ceramic foundry sand produced by Luoyang Ruiyu has the advantage of a small thermal expansion coefficient, and its performance can be comparable to that of zircon sand. The casting will not have expansion defects when the molding sand is prepared with the ceramic foundry sand. Ceramic foundry sand is a neutral material, and both acid and alkali binders can be used. Ceramic foundry sand also has a unique advantage; that is, it is not broken. No dust can be recycled repeatedly, recycled hundreds of times, and the cost performance is naturally high.