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川崎钢铁公司钢研所已研究出在RH脱气装了上采用吹氢的方法,目的是为了在含碳量<20ppm的范围内加速超低碳钢脱碳反应的进行。千叶厂在260t的RH装置上处理脱碳的后期,把氢气吹进连通管内,可使钢水的循环速度达4Nm/min。部分氢溶解于钢水中,使钢水中的氢气升高到约3ppm,这就促进了真空室内铜水中气泡的形成和金-气间界面积的增大。平均在25min内的脱碳处理中,可使含碳量降至7ppm。因此,经25min的脱碳处理,可以确保[C]≤10ppm的超低碳钢。
Steel Research Institute of Kawasaki Iron and Steel Institute has developed a method of blowing hydrogen on RH degassed equipment in order to accelerate the decarburization reaction of ultra-low carbon steel in the range of carbon content <20ppm. Chiba plant in the RH device on the 260t decarburization later, the hydrogen blowing into the communication pipe, the molten steel circulation rate of 4Nm / min. A part of the hydrogen is dissolved in the molten steel to raise the hydrogen in the molten steel to about 3 ppm, which promotes the formation of bubbles in the copper water in the vacuum chamber and the increase of the gold-air boundary area. In an average of 25min decarburization, the carbon content can be reduced to 7ppm. Therefore, after 25 minutes of decarburization, [C] ≤10ppm ultra-low carbon steel can be ensured.