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为澄清硅含量对铁水同时脱磷脱硫动力学的影响,用CaO—CaF_2—CaCl_2—Fe_2O_3粉状熔剂进行了实验室规模的实验。高、中硅铁水(含硅为0.34％和0.13％)的脱磷反应发生于脱硅反应之后;而当含硅量很低时(0.02％),则是立刻发生脱磷反应。供粉后半期发现脱硫反应停滞。实验中观察到的这些特征,可用双联反应动力学模型表达之。同时假定渣相和铁水相中的转移决定着反应速率。用动力学模型计算了供粉时间的影响。
In order to clarify the influence of silicon content on the kinetics of simultaneous hot metal dephosphorization and desulfurization, experiments on a laboratory scale were carried out by using CaO-CaF_2-CaCl_2-Fe_2O_3 powdered fluxes. The dephosphorization reaction of high and medium silicon hot metal (containing 0.34% and 0.13% silicon) took place after the desiliconization reaction. When the silicon content was very low (0.02%), the dephosphorization occurred immediately. After the second half of the powder found desulfurization reaction stagnation. These characteristics observed in the experiment can be expressed in a dual reaction kinetic model. It is also assumed that the transfer of the slag phase and the aqueous iron phase determines the reaction rate. The kinetic model was used to calculate the effect of powder feeding time.