RH MFB精炼过程脱碳数学模型及工艺研究

 为研究RH MFB精炼工艺对脱碳过程的影响，将脱碳机理确定为钢液本体脱碳与CO克服静压力上浮、氩气泡表面脱碳和飞溅液滴脱碳，根据脱碳反应动力学和质量守恒原理建立了RH MFB脱碳数学模型。计算结果表明：降低初始碳含量、增大初始氧含量可使脱碳终点碳含量降低；提高压降速率和吹氩流量、增大浸渍管内径使得脱碳速率增大；在固定氧气流量下，随着吹氧时间的延长，脱碳终点碳含量降低，但脱碳终点氧含量升高。

Mathematical Model and Technology of Decarburization in RH-MFB Refining Process

In order to study the effect of RH-MFB refining technology on decarburization process, the overall decarburization mechanism can be divided into decarburization in bulk molten steel and floating of CO against static pressure, and decarburization on the surface of argon bubbles and splashed liquid drops. Based on each conception, the RH-MFB decarburization mathematical model has been built according to dynamics of decarburization reaction and mass conservation principle. The result indicates that terminal carbon concentration will decrease with decreasing the initial carbon concentration or increasing the initial oxygen concentration; the rate of decarburization will become higher with increasing the pressure decreasing rate, Ar gas flux and inside diameter of infusing tubes, the terminal carbon concentration will be decreased but the oxygen concentration will be increased when the time of flowing oxygen gas increases.