Which is better for converter spraying? The converter spraying is made of high-quality magnesia. The price of magnesia-carbon brick synthetic magnesia-calcium sand is the main raw material. It is made by adding a variety of binders and additives after special particle size ratio. It has the characteristics of high adhesion rate, low rebound, easy spraying, etc. It is suitable for spraying and repairing various parts such as converter trunnion and slag line.