| 摘要 |
A method for stably refining high carbon steel by top and bottom blown converter refining in which the entire quantity or part of refining pure oxygen is blown onto molten iron through a top blowing lance nozzle while blowing an inert gas into the converter through a nozzle at the bottom thereof, and wherein the bottom blown inert gas is fed at a rate less than 0.09 Nm3/minxton during the blowing and/or at a rate less than 0.03 Nm3/minxton in a controlling stage immediately after turndown. |
