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针对电炉加热的特征和弱点,提出了电炉燃气助熔方案,它改善了炉内的温度分布,消除了低温区,加强了上部炉料的预热,在炉门和出钢口处迅速形成熔池,为提前割料,吹氧助熔,早期造渣去P创造了条件,缩短了冶炼时间。结果:①提高了整个炉子的热效率,并使燃气的η_(折算)高达47～57％,比燃气直接发电η_热高0.6～1倍,比燃气用于平炉炼钢高0.5倍以上;②平均电耗降低246～300度/吨钢;③扣除额外消耗的燃气后,纯节能94～150度/吨钢;④提高炉子生产率30～50％;⑤仅节能一项就降低成本10～19元/吨钢,这时钢的含S量,机械性能、非金属夹杂、白点均符合国家标准,炉墙寿命保持在120～200炉。
Aiming at the characteristics and weak points of EAF heating, an electric furnace gas fluxing scheme is proposed, which improves the temperature distribution in the furnace, eliminates the low temperature zone, enhances the preheating of the upper charge, and rapidly forms the weld pool , In order to cut material in advance, blowing oxygen flux, early slagging to P to create the conditions and shorten the smelting time. Results: ①Improve the thermal efficiency of the furnace and make the η_ (conversion) of gas up to 47 ~ 57%, which is 0.6 ~ 1 times higher than η_ heat of direct gas generation and 0.5 times higher than that of gas used in open hearth steelmaking; The average power consumption is reduced 246 ~ 300 degrees / ton of steel; ③ After deducting additional gas consumption, pure energy saving 94 ~ 150 degrees / ton of steel; ④ improve furnace productivity 30 ~ 50%; ⑤ only one energy saving to reduce costs 10 ~ 19 Yuan / ton of steel, when S steel content, mechanical properties, non-metallic inclusions, white spots are in line with national standards, furnace wall life at 120 ~ 200 furnaces.