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利用CFD软件对某厂150 t电弧炉进行了三维三相流数值模拟。将射流冲击深度的数值模拟结果与水模实验外推结果进行了比较,两者吻合较好。模拟结果表明:由于氧气射流的冲击,在熔池表面形成未被渣层覆盖的裸露钢液面,裸露钢液面是氧气与钢液的主要接触区域。利用基于红外烟气分析技术的脱碳模型,测定电弧炉炼钢过程中不同供氧流量下的脱碳速度;分析了流过裸露钢液面的钢液流量对脱碳反应速度的影响。
Three-dimensional three-phase flow numerical simulation of a 150 t electric arc furnace was carried out by CFD software. The results of numerical simulation of jet impact depth and extrapolation of water model experiment are compared, and the two agree well with each other. The simulation results show that due to the impact of the oxygen jet, bare molten steel is formed on the surface of the molten pool which is not covered by the slag layer. The bare molten steel surface is the main contact area between oxygen and molten steel. The decarburization rate under different oxygen supply flow rate in EAF steelmaking process was measured by the decarburization model based on infrared flue gas analysis technology. The influence of molten steel flow rate on the decarburization reaction rate was analyzed.