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Seamless pure calcium cored wire has a very big role in our steel making and cast iron, because it has a very big flexibility, we can do different seamless pure calcium cored wire according to different alloys. In cast iron production, the number of foundries using seamless pure calcium cored wire for iron desulfurization, spheroidization and inoculation is increasing, and the rate of expansion is getting faster and faster.

Seamless pure calcium wire includes an outer layer and an inner layer, said outer layer is lapped and welded connection, said lap is folded inward, said lap is composed of four layers of said outer layer, wherein, from outside to inside at a time are a layer, a second layer, a third layer and a fourth layer, said layer and second layer are welded connection. The invention has the advantages of the existing seamless pure calcium line in addition to the production cost should be reduced, in addition, the feeding machine can be used now single-layer pure calcium line feeding machine, promotion is relatively easy, to solve the current domestic single-layer double-layer pure calcium line spattering, nitrogen increase, reduce smelting costs is of great significance.

Take the early development of the use of seamless pure calcium cored wire skills to produce ductile iron in Germany, for example, at the end of 1989, the German state as long as a foundry to choose seamless pure calcium cored wire method to produce ductile iron, while in 2002, there are 56 plants (accounting for about 32% of its ductile iron plant) with seamless pure calcium cored wire skills instead of the original insertion method, pressure plus magnesium method, etc.. The superior products produced at a lower cost are the long-sought policy of steel mills and foundries around the world. Including China's practice has proved: the core line skills is today's countries around the world, in many aspects of steel and iron processing, the completion of this phoenix wish of simple and easy and agile high energy efficiency skills and methods.

To sum up, the invention of seamless calcium line has greatly improved the production efficiency and product quality of the foundry industry, and also provided great help for the development of the smelting industry.