Jiangsu Weierde Casting Materials Technology Co., Ltd. has been researching for five years and finally developed three major products: riser shrinkage additive (smokeless and carbon free type), super strong deoxidizer, and external refining and purification agent (and applied for national invention patents), which have solved the long-standing problem in the casting industry (slag porosity, shrinkage and porosity), greatly improved the product quality of casting enterprises, especially steel casting enterprises, greatly reduced production costs, and made contributions to the casting industry.