Method for introducing deoxydizing-desulphurizing substances into a mass of liquid metals without the use of gaseous carriers, and cored spiral tube therefor.

摘要

Method for introducing into metal baths substances which act as deoxydesulphurizing agents and/or as agents controlling the shape and size of nonmetallic inclusions, and cored spiral tube therefor.

The method is characterized by the use as a carrier of a cored coiled tube having turns of any section and size. The hollow carrier has walls ≤ 20 mm thick and an inside diameter of less than 100 mm

In one embodiment tho hollow carrier is introduced into the bath at a periodically variable rate within a range of 0 to 10 m/s, so as to be subjected to longitudinal vibration. The invention comprises also the cored spiral tube per se.