| 摘要 |
A vertical first stream of molten metal (21) flows from a ladle into the tundish of a continuous casting apparatus. A second stream (27) composed of solid, particulate alloying ingredient and a non-oxidizing carrier gas is directed into the first stream with a nozzle (24). The two streams (21, 27) each have unenclosed parts exposed to the atmosphere surrounding the ladle and the tundish. The nozzle (24) is cooled with a non-oxidizing gas flowing through a nozzle cooling jacket (31) and exhausted at the outlet end (37) of the nozzle (24). The nozzle interior has a converging downstream end portion (45) for converging the second stream (27) just before it leaves the nozzle (24). |
