新日本钢铁公司(NSC)在其八幡厂,研究开发出一种钢水炉外精炼新工艺——密封吹氩吹氧调整成分工艺,简称CAS/CAS—OB法。在CAS法中,精炼主要是调整成分,而在CAS—OB法中,则是把出钢时温度太低的钢水或由于浇铸温度太低而从连铸机退回的钢水加铝加热。其原理是通过CAS罩插入一根氧枪,使吹到钢水上的氧与连续送入的铝起反应,从而加热钢水。钢包底部通过透气塞吹入氩气搅 At its Yawata plant, the new Nippon Steel Company (NSC) has developed a new process for the refining of molten steel outside the furnace - a process for the adjustment of the composition of the argon blowing and oxygen blowing seal, referred to as the CAS / CAS-OB method. In the CAS method, refining is mainly the adjustment of ingredients. In the CAS-OB method, molten steel with too low temperature during tapping or molten steel returned from the continuous casting machine due to the low pouring temperature is added with aluminum. The principle is inserted through the CAS cover an oxygen gun, so that the oxygen blowing on the molten steel and aluminum fed continuously react to heat the molten steel. The bottom of the ladle is blown into the argon gas through the breathable plug