(東北大學(xué)材料與冶金學(xué)院， 沈陽 110006)
摘 要: 用交流阻抗法研究了融熔Cu-S/CaO-SiO2-Al2O3體系界面脫硫反應(yīng)動力學(xué)， 得到了該體系的阻抗響應(yīng)圖。 通過用Randles 等效電路， 并將所得的阻抗用非線性最小二乘法擬合， 獲得Cu-S/CaO-SiO2-Al2O3體系界面脫硫反應(yīng)動力學(xué)的參數(shù)， 如熔渣電阻Re， 電極反應(yīng)電荷傳遞電阻Rct， 電極雙電層電容Cdl及脫硫反應(yīng)速率常數(shù)kf等。
關(guān)鍵字: 交流阻抗法 渣金界面 脫硫反應(yīng) 動力學(xué)
（School of Materials and Metallurgy, Northeastern University, Shenyang 110006, P. R. China
）
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.
Key words: AC impedance slag-metal interface desulfurization reaction kinetics
