Influence Factors of Aluminum–Slag Interfacial Reaction Under Electric Field  

作　　者：Xin-Yu Lv An-Ping Dong Jun Wang Da Shu Bao-De Sun 

机构地区：[1]Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming, Shanghai Jiao TongUniversity, Shanghai 200240, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2017年第8期753-761,共9页金属学报（英文版）

基　　金：supported by National Natural Science Foundation of China (Grant Nos. 51274141,51204110);National Basic Research Program of China (Grant No. 2012CB619505);Science and Technology Commission of Shanghai Municipality (STCSM) for high-tech project (Grant Nos. 15111108000)

摘　　要：The interfacial reaction between aluminum melt and molten slag under an electric field plays a significant role in aluminum electro-slag refining. Here we studied this interracial reaction within 680 and 820 ℃ under an electric field between 0 and 9 V. The evolution of aluminum composition was analyzed by inductively coupled plasma atomic emission spectroscopy. The dominant factor during the interfacial reaction was identified through orthogonal experiments, in which the slag-to-aluminum mass ratio, initial silicon concentration, electric voltage, reaction time, and temperature were selected as the influence factors. The greatest influence factor on the interracial reaction was found to be the reaction time. Also, single-factor experiments revealed that the reaction kinetic processes largely obeyed an irreversible kinetic model, and the silicon removal efficiency was enhanced by increasing the voltage and slag/metal ratio.The interfacial reaction between aluminum melt and molten slag under an electric field plays a significant role in aluminum electro-slag refining. Here we studied this interracial reaction within 680 and 820 ℃ under an electric field between 0 and 9 V. The evolution of aluminum composition was analyzed by inductively coupled plasma atomic emission spectroscopy. The dominant factor during the interfacial reaction was identified through orthogonal experiments, in which the slag-to-aluminum mass ratio, initial silicon concentration, electric voltage, reaction time, and temperature were selected as the influence factors. The greatest influence factor on the interracial reaction was found to be the reaction time. Also, single-factor experiments revealed that the reaction kinetic processes largely obeyed an irreversible kinetic model, and the silicon removal efficiency was enhanced by increasing the voltage and slag/metal ratio.

关 键 词：Molten salts Interfacial reaction SILICON Electric field ALUMINUM Kinetic model 

分 类 号：TF821[冶金工程—有色金属冶金]