日本新日铁公司发明了一种在转炉内冶炼超低硫钢的方法。冶炼过程分成2个阶段:在第1阶段当铁水含碳量降至0.3%～2.5%时,加入脱硫剂进行脱硫处理,然后把脱硫渣清除。在第2阶段,加入脱磷剂进行吹氧冶炼,最后得到成分合乎规定的钢水。第1阶段铁水含碳量不能大于2.5%,否则脱碳量不 Japan’s Nippon Steel Company invented a converter in the smelting of ultra-low-sulfur steel. Smelting process is divided into two stages: In the first stage when the molten iron carbon content decreased to 0.3% ~ 2.5%, the desulfurization agent was added for desulfurization, and then remove the desulfurization residue. In the second stage, adding dephosphorizer oxygen blowing smelting, and finally get the composition of the required molten steel. The first phase of hot metal carbon content can not be greater than 2.5%, otherwise decarburization is not