Re-understanding for modern EAF steel-making of charging hot metal
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摘要: 根據天津鋼管電弧爐煉鋼熱裝鐵水的工藝實踐指出:熱裝鐵水技術不但可以提高經濟效益,而且還能擴大電弧爐熔煉鋼種范圍;對傳統電弧爐和利用化學能煉鋼的氧氣轉爐的熔池形狀進行比較可知,利用電能和化學能相結合的現代電弧爐熔池形狀設計深度應介于傳統電弧爐和氧氣轉爐之間;對熱裝鐵水的成本變化和熱裝鐵水效益全面比較,結合熱裝鐵水帶來的負面影響,綜合確定了現代電弧爐采用熱裝鐵水的比例;鐵水熱裝最佳方式是從爐后側開口兌入鐵水;鐵水溫度 ≥ 1200℃;鐵水中硅質量分數 ≤ 1.0%,最好 ≤ 0.5%.Abstract: According to Tianjin Pipe practice of charging hot metal to a modern electric arc furnace, it was known that the hot metal charging technology could increase the economic benefit and expand the EAF steel grads. Compared the traditional arc furnace with the oxygen converter, the depth of the pool of a modern EAF should be between the EAF's and the basic oxygen converter's. Compared the changes of the cost with the profit and the negative influence of charging hot metal, the proportion of the charging hot metal was determined. The best place to charge hot metal into a modern EAF was the back of the opening acidic. The temperature of the hot metal should be higher than 1200℃. Silicon in hot metal should be lower than 1.0% (mass fraction), and the best should be lower than 0.5%.
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Key words:
- EAF steel-making /
- hot metal charging /
- high efficiency
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