论文部分内容阅读
针对唐钢50 t转炉冶炼条件,采用Fluent软件对氧气射流—钢液两相间相互作用进行了数值模拟研究,分析了变角氧枪作用下熔池内钢液流场、枪位及喷孔倾角对弱搅拌区比率的影响规律,为变角氧枪结构优化提供了理论依据。结果表明:与非变角氧枪相比,变角氧枪作用下钢液流场更均匀;熔池底部存在弱搅拌区,随着枪位的提升,熔池弱搅拌区比率有所增加;除喷头F外,研究的变角氧枪作用下熔池的弱搅拌区比率普遍低于非变角氧枪;在同一枪位下,与对角喷孔倾角相差0.5°相比,对角喷孔倾角相差1°时,熔池内弱搅拌区比率更低;在研究的9个喷头中,喷头D(11°/12°)作用下熔池内弱搅拌区比率最小。
Aiming at the conditions of 50 t converter smelting in Tangshan Iron and Steel Co., Ltd., the Fluent software was used to simulate the interaction of oxygen jet and molten steel. The effects of variable oxygen lance on molten steel flow field, Weak mixing zone ratio of the impact of law for the variable angle lance structure optimization provides a theoretical basis. The results show that compared with the non-variable oxygen lance, the flow field of molten steel is more uniform under the action of variable oxygen lance; weak agitation zone exists at the bottom of the molten pool, and the ratio of weak agitation zone increases with the increase of lance position; In addition to the nozzle F, under the action of variable angle oxygen lances, the weakly agitated zone ratio of the molten pool is generally lower than that of the non-variable angle lance. Under the same gun position, The ratio of weak mixing zone in the molten pool was lower when the angle of inclination was different by 1 °. Among the 9 nozzles studied, the ratio of weak mixing zone in the molten pool was the smallest under the action of D (11 ° / 12 °).