Refining lance.

摘要

Refining lance comprising a primary tuyere for supplying the refining oxygen to a bath of metal and a tuyere (6) for supplying the postcombustion oxygen. The mouth (3) of the tuyere (6) supplying the postcombustion oxygen is arranged on the front face of the lance head (1) concentrically around the mouth (2) of the primary tuyere. The mouth (3) of the tuyere (6) consists of two opposing sides, one external and the other internal, of substantially circular appearance, the external side having at least one sharp edge situated in the extension of the converging part of the tuyere (6). <IMAGE>