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为确保所有废钢在最后摇炉前全部熔化,可选用小于150mm 当量厚度的废钢。对 LD 转炉和底吹转炉可通过氧燃喷枪和炉底喷嘴对废钢预热,预热两分半钟,熔化废钢能力每吨钢可增加50kg。CO 燃烧成 CO_2的强烈放热作用能够提高转炉熔化废钢的能力,每吨铜多用5Nm~3的氧就能够多熔化废钢60kg。加入发热元素可以提高转炉熔化废钢的能力。FFOX法热源来自废钢中部分铁的燃烧。为改善热平衡,应用其它发热元素(Si、Ca、C)比用铁多。ALCI 法二次燃烧率达20％以上。KMS 法转炉废钢比可提高到100％。EOF 炉生产成本比平炉低15美元/t。苏联研究成功了100％废钢的顶、底、侧三向吹炼法。研究煤-氧喷吹复合炼钢工艺,对我国钢铁工业的发展具有重要的现实意义。
To ensure that all scrap is fully melted before the final shaker, scrap of less than 150mm equivalent thickness may be used. The LD converter and the bottom blown converter can preheat the scrap by means of an oxy-fuel lance and a bottom nozzle, with two and a half minutes preheating, and an additional capacity of 50 kg per ton of molten steel. Combustion of CO into a strong exothermic CO 2 can increase the ability of the converter to melt the scrap, and more than 60 kg of scrap can be melted with 5 Nm -3 of oxygen per ton of copper. The addition of heating elements increases the ability of the converter to melt scrap. The FFOX heat source comes from the partial burning of iron in scrap. To improve heat balance, use more heat-emitting elements (Si, Ca, C) than iron. ALCI secondary combustion rate of 20% or more. KMS converter scrap ratio can be increased to 100%. EOF furnace production cost lower than the hearth 15 US dollars / t. The success of the Soviet Union 100% scrap steel top, bottom, side three blowing method. Study of coal - oxygen injection compound steelmaking process, the development of China’s steel industry has important practical significance.