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为了改善汽车用钢板的加工性能。要尽可能地降低钢材中的含碳量。然而一般转炉吹炼只能把钢水中的含碳量降低到0.04％左右,要使含碳量进一步降低,需采用炉外精炼设备,但这样一来炼钢成本增加。 日本新日铁公司研究出一种方便和廉价的用转炉吹炼超低碳钢的工艺,可使钢水的合碳量降低到0.005％以下。这种吹炼工艺的主要操作方法是:一、将铁水倒入转炉开始进行吹炼后,在吹炼末期当含碳量降低到0.08％时,顶吹氧枪停止吹氧,因为如果继续
In order to improve the processing performance of automotive steel plate. To reduce the carbon content of steel as much as possible. However, the general converter blowing can only reduce the carbon content of molten steel to about 0.04%, to further reduce the carbon content, the need to use furnace refining equipment, but as a result steelmaking costs increase. Japan’s Nippon Steel Company has developed a convenient and inexpensive process of blowing ultra-low carbon steel converter can reduce the carbon content of molten steel below 0.005%. The main operation of this blowing process is: First, the hot metal into the converter after the beginning of blowing, blowing carbon content decreased to 0.08% at the end of blowing, the top blowing lance to stop blowing oxygen, because if continue