The traditional square section is made of wear-resistant steel or ceramic patch. Its main function is to connect the connector of the pulverized coal pipe and convert the function of the interface. As the circular pipe becomes a square pipe, the trajectory of the pulverized coal has changed, and the pipe wall has a strong scouring, which is very serious, resulting in problems such as wear of the pipe and falling off of the ceramic piece, which brings safety hazards to the operation of the boiler. . This kind of fan coal mill system has a relatively large pipe diameter. Our company adopts silicon carbide integral casting, one molding, no weak links, smooth surface and good integrity. It is incomparable with wear-resistant steel and ceramic patch. Our company can produce various types of silicon carbide squares according to customer's drawing requirements.