Numerical simulation of off-gas formation during top-blown oxygen converter steelmaking
Numerical simulation of off-gas formation during top-blown oxygen converter steelmaking
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DOI：
10.1016/j.fuel.2011.01.022
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发表时间：
2011-04
期刊：
影响因子：
7.4
通讯作者：
Sen Li;Xiao-lin Wei;Lixin Yu
中科院分区：
文献类型：
--
作者：
Sen Li;Xiao-lin Wei;Lixin Yu
氧气顶吹转炉炼钢过程中会产生大量的高温烟气，烟气中含有高浓度的一氧化碳（CO），是宝贵的有价燃料。建立了氧气顶吹转炉烟气生成的数值模型，利用该模型对转炉烟气生成过程进行了模拟，研究了转炉操作模式对转炉烟气特性（浓度、温度、流量和显热通量）的影响。模拟结果表明，CO浓度变化平缓，10-80%吹氧时间内CO浓度可达80%左右，0-90%吹氧时间内CO2浓度变化趋势与CO浓度相反，氧枪高度变化剧烈导致尾气流量波动较大。吹氧压力的操作方式对烟气显热通量有显著影响，在40-80%吹氧时间内烟气显热通量较高。
In top-blown oxygen converter steelmaking process, a large amount of high-temperature off-gas is produced, and the off-gas is a precious valuable fuel containing high concentration of carbon monoxide (CO). Numerical model is developed for top-blown oxygen converter off-gas formation, the off-gas formation is simulated using the developed model, and the influences of the operating model of converter on the characteristics of off-gas (concentrations, temperature, flowrate and sensible heat flux) are investigated. The simulated results indicate that CO concentration varies gently, CO concentration can reach about 80% during 10–80% blowing oxygen time, the change trend of CO2concentration is contrary to that of CO concentration during 0–90% blowing oxygen time, and the dramatic changes of oxygen lance height result in significant fluctuations of off-gas flowrate. The operation model of oxygen-blowing pressure significantly affects off-gas sensible heat flux, and the sensible heat flux is high during 40–80% blowing oxygen time.