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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.