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在顶底复吹转炉熔池侧壁上安装侧吹枪,形成顶底侧吹转炉。通过实验室物理模拟研究了顶底侧吹条件下转炉熔池的混匀行为;在工业试验中,对比了顶底侧吹转炉和顶底复吹转炉炼钢的冶金效果。实验室研究结果表明,顶底侧吹技术可以显著提高转炉熔池的搅拌能力,大幅度降低转炉熔池的混匀时间,存在一个临界侧吹气量,当侧吹气量大于该临界值后,熔池混匀时间变化不大。工业试验结果表明,转炉采用顶底侧吹技术,可以降低钢铁料消耗,吨钢石灰消耗可降低将近3 kg,提高了转炉的脱磷能力,降低终点炉渣和钢水的氧化性,炉役平均出钢w([C])×w([O])=0.002 5×10-4,钢水氧化性的降低提高了合金元素收得率。
Top and bottom blown converter furnace pool side wall mounted side blowing gun, forming top and bottom side blown converter. Through the laboratory physical simulation, the mixing behavior of the converter bath under top and bottom side blowing was studied. In the industrial experiment, the metallurgical effects of top and bottom side converter and top and bottom converter were compared. Laboratory results show that the top and bottom side blowing technology can significantly improve the mixing capacity of the converter bath, significantly reduce the mixing time of the converter bath, there is a critical side of the air volume, when the side air volume is greater than the critical value, the melting Mixing time pool little change. Industrial test results show that the top and bottom side blowing converter technology can reduce the consumption of steel material, steel consumption per tonne of steel can be reduced by nearly 3 kg, increased dephosphorization capacity of the converter, reducing end-point slag and molten steel oxidation, Steel w ([C]) × w ([O]) = 0.002 5 × 10-4, the reduction of the oxidizability of the molten steel increases the alloying element yield.