Luoyang Dahua Heavy Type Machinery Co., Ltd. created a high effective impact crusher in 1989. It is successfully tested in 1990. This product was firstly used in steel slag production line of Capital Steel Co., and it gained a high honor and passed national inspection in 1991. In the same year, it gained the excellent product award in Henan Province, and passed the patent in 1992. From then on, our first generation Vertical Shaft Impactor was famous and be the special equipments for steel slag r