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平炉顶吹氧是国内外平炉技术改造、提高经济效益的重要手段。国内外顶吹氧平炉均采用较高的废钢配比,如加拿大希尔顿钢厂500T平炉采用45％的废钢及4％生铁块的炉料组成,单炉年产90万吨。国内上钢三厂因经济上的原因亦采用高废钢配比、鞍钢二炼钢得出:“供氧强度达0.33(HM~3/吨·分)时,可取消装料矿石。”的结论。我厂于79年2月在1~#平炉上开始采用顶吹氧,但受炉子结构(1~#、3~#、4~#炉为三上升道)、氧气、及生产条件多因素限制、供氧强度很低(3500～5000HM~3/小时或0.18HM~3/吨·分)装料沿用矿石铺底,随着要提高炉子单产、炉子改造性大修及三枪用氧的实现,供氧强度还会增加。而随供氧强度提高,是否取消装料矿石已提至议事日程?而不同的炉
Flat top oxygen blowing is domestic and foreign open hearth technological transformation, an important means to improve economic efficiency. Domestic and foreign top blowing oxygen furnace are used in the higher scrap ratio, such as Canada’s Hilton 500T flat steel furnace with 45% scrap and 4% pig iron charge, a single furnace with an annual output of 900000 tons. The third domestic steelmaker, due to economic reasons, also adopted the high-scrap ratio. Anshan Iron and Steel No. 2 Steelmaking concluded: “Omission of ore can be canceled when the oxygen supply strength reaches 0.33 (HM ~ 3 / t · min).” . Our factory began to use top-blowing oxygen in 1 ~ # flat furnace in February of 1979, but it was restrained by many factors such as furnace structure (three rising paths of 1 ~ #, 3 ~ # and 4 ~ # furnace), oxygen and production conditions , Oxygen supply is very low (3500 ~ 5000HM ~ 3 / hour or 0.18HM ~ 3 / t · min) loading along the ore bedding, with the furnace to improve yields, furnace renovation overhaul and three guns with oxygen for Oxygen intensity will also increase. With the oxygen intensity increased, whether to cancel the loading ore has been put on the agenda? And different furnace