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四、管线钢的生产工艺高质量管线钢目前的基本生产模式是“氧气转炉——喷吹处理—连续注锭”。英钢联(BSC)所采取的流程其要点为:向氧气转炉加入低硫铁水([S]=0.002～0.01%)及低硫废钢([S]≤0.015%),可炼出低硫,低残余元素和化学成分稳定的钢水。出钢时必须将转炉下渣量限制到最小程度,通常是用半浮式挡渣球或出钢口挡渣棒。下一步保证钢质量的有力措施是采用各种形式的二次精炼,在 BSC 它包括真空脱气和深部喷吹钙的化合物。实践表明,采用此种精炼技术可准确地控制化学成分、达到超低硫(≤0.001%)
Fourth, the production process of pipeline steel High-quality pipeline steel current basic mode of production is “oxygen converter - injection treatment - continuous injection.” The main points of the process adopted by BSC include: adding low sulfur molten iron ([S] = 0.002-0.01%) and low sulfur scrap ([S] ≤0.015%) to an oxygen converter to refine low sulfur, Low residual elements and chemically stable molten steel. During tapping, the amount of slag under the converter must be limited to a minimum level, usually using a semi-floating slag tap or tapping tap. The next powerful measure to assure the quality of the steel is the use of various forms of secondary refining, at BSC it includes vacuum degassing and deep injection of calcium compounds. Practice shows that the use of such refining technology can accurately control the chemical composition to achieve ultra-low sulfur (≤ 0.001%)