摘要:
以某厂50 t转炉及其四孔氧枪的结构和工艺参数为基础,采用fluent数值模拟方法,重点研究喷孔间距、枪位以及流股融合距离对变角和非变角氧枪射流作用下熔池有效冲击面积的影响规律。研究结果表明:随着枪位的提升,射流对熔池的有效冲击面积将呈现先增加后降低的趋势,从有效冲击面积的角度考虑,应将枪位控制在最大有效冲击面积对应的枪位以内;流股融合距离对于熔池的冲击面积影响显著,融合距离越长,流股中心线与氧枪轴线的偏移越大,射流对熔池冲击形成的凹坑面积越大;随着喷孔间距的减小,射流对熔池的有效冲击面积逐渐减小;喷孔间距越大,射流速度的波动性越大,减小喷头的喷孔间距可以使速度更快趋于稳定;变角氧枪的有效冲击面积值明显大于非变角氧枪。
关键词:
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转炉 /
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数值模拟 /
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冲击面积 /
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喷孔间距 /
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枪位 /
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融合距离
Abstract:
Based on the design and technology parameters of four-hole oxygen lance applied in an steelmaking workshop,influence of orifice spacing,lance level and syncretizing length on the impact area of molten bath under gas jet sprayed from non-variable angle and variable angle four-hole oxygen lance were simulated by Fluent software.It is showed that the impact area of molten bath under gas jet sprayed increase to the summit and then decline with the increasing of the lance level.From the view of effective impact area of molten bath,the lance level should be controlled within the lance height at which the maximum effective impact area can achieved.The influence of syncretizing length on the impact area of molten bath is significant,the impact area of oxygen jet to molten bath increase with the increasing syncretizing length and the drift distance of central line.The impact area of molten bath decline with the decrease of the orifice spacing.The fluctuation of flow speed increase with the increasing of orifice spacing,reducing the orifice spacing can make the speed stable quickly.The impact area of molten bath by variable angle oxygen lance are considerably larger than that by non-variable oxygen lance at the same lance level.