(中南大學(xué) 信息科學(xué)與工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 針對(duì)鋅電解過(guò)程中陰極板上鋅反溶對(duì)電解能耗、電流效率及析出鋅產(chǎn)量影響難以確定的問(wèn)題，基于有限元分析的方法，結(jié)合流體動(dòng)力學(xué)方程及電極反應(yīng)動(dòng)力學(xué)方程，分別建立考慮鋅反溶和不考慮鋅反溶情況下的鋅電解過(guò)程數(shù)學(xué)模型，利用多物理場(chǎng)仿真軟件COMSOL建立鋅電解槽的三維有限元模型，模擬計(jì)算鋅電解槽中極板上的電解能耗、電流效率及析出鋅產(chǎn)量變化的分布。結(jié)果表明：在給定實(shí)驗(yàn)條件下，與不考慮鋅反溶反應(yīng)的模型相比，鋅電解過(guò)程電流效率的相對(duì)誤差降低3%~4%，陰極板上析出鋅產(chǎn)量的相對(duì)誤差降低2%~5%；驗(yàn)證鋅電解模型中考慮鋅反溶的必要性。為進(jìn)一步研究鋅電解的優(yōu)化奠定基礎(chǔ)。
關(guān)鍵字: 鋅反溶；電極反應(yīng)動(dòng)力學(xué)；數(shù)值模擬；COMSOL
（School of Information Science and Engineering, Central South University, Changsha 410083, China）
Abstract:In order to determine the influence of reverse dissolution of zinc on energy consumption, current efficiency and the output of zinc in zinc electrolysis process, the mathematical models of considering the zinc dissolution and without considering zinc dissolution on zinc electrolysis process were established, respectively, based on finite element analysis and combining fluid dynamics and electrode kinetics equation. To calculate the model numerically and obtain the data of energy consumption, current efficiency and the output of zinc on cathode surface, a 3D model was built up in simulation software COMSOL. The results show that comparing with the model without considering reverse dissolution of zinc, the relative error of current efficiency and the output of zinc on cathode reduces 3%-4% and 2%-5%, respectively, which verifies the necessity of considering the reverse dissolution in zinc electrolysis model. Therefore, the work makes a fundamental for the further optimal control of zinc electrolysis process.
Key words: reverse dissolution; electrode kinetics; numerical simulation; COMSOL
