1.Keep warm,reduce the loss of alloy element 2.Reduce phosphorus,sulfur hazardous element 3.silica sand,unique in China Slagging Agent1. the product is suitable for use in ductile iron, ductility. Product features: this product is gray, appearance of granular. Non-toxic. No harmful ingredients. Tasteless.2 .this product is complex, it sets the integrating slag... Not slag with bag3. high ...