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通过实验室建立的小型实验炉,进行集束射流加热金属冷料的热态模拟实验,分析了集束射流火焰在不同冶炼阶段的成分变化.实验研究表明:集束射流火焰形态呈现多样性特点,燃烧产物成分不断变化.在金属冷料的存在作用下,少量CO2气体产生,O2增加,CO下降;熔化期中,O2逐渐升高,CO逐渐降低,CO2体积分数一直保持在1%～2%;脱碳期与熔化期相比,O2下降,而CO上升,CO2稍有增加;脱碳期中,钢水中C含量逐渐降低,CO2和O2有所增加,而CO含量剧烈降低.集束射流火焰燃烧产物中,各成分之间关系密切,CO的含量随着O2含量的升高而降低.在熔化期中,CO气体含量随着CO2气体含量的增加而增加;在脱碳期,CO气体含量随着CO2气体含量的增加而降低.
The small-scale experimental furnace set up in the laboratory was used to carry out the thermal simulation experiment of the bundled jet-heated metal cold material, and the composition changes of the bundled jet flame in different metallurgy stages were analyzed.The experimental results show that the flame shape of the bundled jet presents diversity characteristics, In the presence of metal cold charge, a small amount of CO2 gas was generated, O2 increased and CO decreased. In the melting phase, O2 gradually increased and CO decreased gradually, and the volume fraction of CO2 remained at 1% -2% During the decarbonization phase, the content of C in the molten steel decreased gradually while the content of CO2 and O2 increased while the content of CO decreased sharply.In the products of flame confinement, The content of CO decreased with the increase of O2 content.In the melting period, the content of CO gas increased with the increase of CO2 gas content; in the decarburization period, the content of CO gas increased with the increase of CO2 gas content Increase and decrease.