融熔Cu-S/CaO-SiO2-Al2O3体系界面脱硫反应动力学的阻抗分析
来源期刊：中国有色金属学报1999年第1期
论文作者：王淑兰 隋智通 李光强 王庚华
文章页码：150 - 154
关键词：交流阻抗法，渣金界面，脱硫反应，动力学
Key words：AC impedance, slag-metal interface, desulfurization reaction, kinetics
摘 要：用交流阻抗法研究了融熔Cu-S/CaO-SiO2-Al2O3体系界面脱硫反应动力学， 得到了该体系的阻抗响应图。 通过用Randles 等效电路， 并将所得的阻抗用非线性最小二乘法拟合， 获得Cu-S/CaO-SiO2-Al2O3体系界面脱硫反应动力学的参数， 如熔渣电阻Re， 电极反应电荷传递电阻Rct， 电极双电层电容Cdl及脱硫反应速率常数kf等。
Abstract: The interfacial reaction between molten Cu-S alloy and CaO-SiO2-Al2O3 slag was studied by an AC impedance method to clarify the individual kinetic factors concerning the electrode reaction at the interface between the alloy and the slag. The total impedance between Cu-S alloy and CaO-SiO2-Al2O3 slag was measured. The results obtained were successfully used to determine the individual kinetic factors on the electrode reaction between the alloy and the slag, such as electrolyte resistance Re, double-layer capacitance Cd, charge transfer resistance Rct, rate constant of desulfurization reaction kf and so on. When overpotential η equals to -100 mV, these values are as follows: Re=3.98×10-4Ωm2, Rct=7.23×10-4Ωm2, Cd=6.79×10-2Fm-2, kf=1.26×10-3s-1.
