论文部分内容阅读
建立RH装置内钢液流动与脱碳过程耦合的数学模型,采用均相流模型提出一种新的流场计算方法,避免了先前的一些不具推广性的模型与方法,如简化计算区域或者预先规定含气率分布等。应用该模型对有、无旋转磁场作用时的RH系统进行了模拟计算,模拟结果表明:流场和脱碳过程与文献中实验结果相符合;有旋转磁场作用时,脱碳速度比无磁场作用时明显增加。造成这一现象的主要原因是:①旋转磁场作用下,RH系统的循环流量得到了提升,循环流量是影响脱碳速度的最主要因素;②旋转磁场增加了RH系统内的搅拌能,即增加了碳的容积传质系数,从而增加了脱碳速度。
A mathematic model of the coupling between molten steel flow and decarburization in RH plant was established. A new flow field calculation method was proposed based on homogeneous flow model. Some previous models and methods without generalization were avoided, such as simplifying the calculation area or pre- Provisions gas distribution and so on. The simulation results show that the flow field and the decarburization process accord with the experimental results in the literature. When the rotating magnetic field is applied, the decarburization speed is faster than the non-magnetic field When significantly increased. The main reasons for this phenomenon are as follows: (1) Under the action of rotating magnetic field, the circulating flow rate of RH system is increased, and the circulating flow rate is the most important factor affecting the decarburization rate. (2) The rotating magnetic field increases the stirring energy in RH system Volumetric mass transfer coefficient of carbon, thereby increasing the decarburization rate.