Refining method of low carbon high nitrogen steel

摘要

The invention of the furnace taltal low carbon steel blowing converter furnace oxidation process and a series of metallurgical furnace, etc. without causing unbalance in the reaction as the nitrogen in molten steel up to a large amount heupjil relates to a method for refining a chronic carbon steel, ; after the start of the blowing of the refining converter supplying oxygen through the lance and sangchwi, jeochwi adding a molten steel by blowing nitrogen gas to the nitrogen in the molten steel through a nozzle 5.6 ~ 8.5N / min; The blowing through of nitrogen and 90% of the top line to the oxygen line at the time of blow lance by mixing a certain amount of oxygen and nitrogen, wherein the lances for blowing the molten metal by adjusting the height from the group wide area of the reaction system with nitrogen which is supplied with molten steel step to complete the blow by setting the pattern; In a subsequent step, the iron alloy, the typical tapping temperature measuring process and bubbling, and only performed the sampling, the vacuum degassing process, characterized in a low carbon and nitrogen reflux and Steel refining method to conduct fine-tuning components.