A silicon nitride ceramic riser tube is a type of ceramic tube made from silicon nitride (Si3N4) material. It is used in the investment casting process to create a reservoir for molten metal, allowing for the feeding of liquid metal to compensate for shrinkage during solidification.

• The long-term practical use proves that  Silicon Nitride Ceramic is very suitable for low-pressure casting and the riser of quantitative furnace.
• Compared with traditional cast iron, silicon carbide, carbon nitrogen materials and Aluminum Titanate, Silicon Nitride Ceramics have the best high-temperature strength and the service life can last for more than one year.
• The low wettability to aluminum liquid, makes the SG-28 Silicon Nitride Ceramic can effectively reduce the slagging on the inner and outer walls of the riser, reduce the shutdown loss and maintenance.
• Silicon Nitride Ceramic has excellent corrosion resistance, which can effectively reduce the pollution to the aluminum liquid, and is conducive to improving casting quality.

Precautions for Use

• Before installing the Riser Tube, please install the flange acc. to the instruction,  and use high-temperature sealing materials that meet the requirements;
• For the sake of safety, the product should be dried and preheated above 400degree before use;
• In order to prolong the service life of the Riser Tube, it is recommended to clean and maintain the surface regularly (once every 7-10 days).