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一、前言氧气转炉顶底复合吹炼技术在降低渣中氧化铁含量、提高金属收得率、防止钢液过氧化、降低铁合金和熔剂消耗、提高钢的质量和炉龄等方面都比氧气顶吹转炉工艺优越。目前,复合吹炼技术已成为国内外氧气转炉技术发展的方向。在我国,大多数复吹转炉都是以底吹氮气和氩气为特征的,氮、氩切换是底吹供气的基本方式。氮气作为一种价廉气源可以大量使用,但钢中氮含量超过一定范围,就会使钢质恶化,钢的塑性、
First, the foreword Oxygen converter top and bottom compound blowing technology in reducing slag iron oxide content, improve metal yield, to prevent liquid steel peroxide, reducing ferroalloy and flux consumption, improve the quality of steel and furnace, etc. than oxygen top Blowing converter process superior. At present, the compound blowing technology has become the direction of the development of oxygen converter technology at home and abroad. In our country, most of the multi-blowing converters are characterized by bottom blowing of nitrogen and argon, and switching of nitrogen and argon is the basic mode of bottom blowing. Nitrogen as a cheap gas source can be used in large quantities, but the nitrogen content exceeds a certain range of steel, it will deteriorate the steel, steel plasticity,