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简析了钢液RH精炼中的脱硫过程。基于冶金热力学和动力学,建立了该过程的数学模型。以该模型对实际过程作了数值模拟,并考察了粉剂的粒度、用量及其在钢中的停留时间对脱硫的影响。该模型给出的结果与工业试验数据较吻合;随着初始硫含量的增加,脱硫率有上升的趋势;减小粉剂粒度可改善脱硫效果;加大粉剂用量能够提高脱硫量,但脱硫剂的最大用量受实际工艺条件所限制。适当降低提升气体流量可延长粉剂在钢中的停留时间和提高脱硫效率。
Analysis of Desulphurization Process in RH Refining of Molten Steel. Based on metallurgical thermodynamics and kinetics, a mathematical model of the process is established. The model was used to simulate the actual process. The effects of particle size, dosage and residence time in steel on desulfurization were investigated. The results of the model are in good agreement with those of industrial tests. With the increase of initial sulfur content, the desulfurization rate tends to increase. Reducing the particle size of the powder can improve the desulfurization efficiency. Increasing the amount of powder can increase the desulfurization capacity. However, The maximum dosage is limited by the actual process conditions. Properly reducing the gas flow rate can prolong the powder residence time in the steel and improve the desulfurization efficiency.