利用同位素交换法测定了熔渣表面CO2与氧化铁熔渣之间氧迁移反应的 速度常数, 并基于电化学反应机制, 分析了添加P2O5对该过 程的影响, 建立了一个新的反应动力学模型. 该模型认为P2O5 作为易挥发组分参与对电子的竞争, 抑制氧迁移 (CO2+2e=CO+O2-)主反应的进行. 对实验数据的 分析和拟合表明了模型的可用性, 也辅证了反应的电化学机制.
The rate constant of oxygen transfer reaction between the molten iron oxide and CO2 gas on the surface of liquid slag was measured by the isotope exchange method. Also, according to the electrochemical mechanism in the reaction process, the effect of P2$O5 additive was discussed and a new model was established. From this model, due to participating the electron competition while volatilizing from slag, P2$O5 decreases the oxygen transfer rate. The results of analyzing and fitting to the experimental data have indicated that this new model is available to explain the effect of P2O5, and supported the view which there exits an electrochemical mechanism in this process.
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