Study on the Electrolysis Expansion of Carbon Cathode in K3AlF6/Na3AlF6-AlF3-Al2O3 Low Temperature melts
(0) Electrolysis expansion of carbon cathodes due to alkali metal penetration in K3AlF6/Na3AlF6-AlF3-Al2O3 melts was tested.Effect of ampere density and superheating temperature on the electrolysis expansion was studied.A mathematical model was got to numerically describe electrolysis expansion performance of carbon cathode.The results indicated that K and Na penetrate into carbon cathode from outside to inside.Ampere density and superheating temperature had a great effect on the electrolysis expansion of carbon cathode.With the superheating temperature increasing from 10℃ to 50℃,electrolysis expansion increased from 1.41% to 2.10% gradually.With the ampere density increasing,the increase trend of electrolysis expansion was not linear.When ampere density was lower than 0.4A / cm2 and greater than 0.7A/cm2,cathode electrolysis expansion obviously increased with the increase of ampere density.Meanwhile,cathode electrolysis expansion tended to be constant as the ampere density changed at the range of 0.4A / cm2 to 0.7A/ cm2.The results of the mathematical model in this study had a good agreement with the test results.This model would be helpful to accurately describe the anti-penetration performance of K and Na on the carbon cathode.
Cathode material Electrolysis expansion Ampere density Superheating temperature Aluminium electrolysis
Zhao Fang Pengfei Xu Jian Xu Linbo Li Jun Zhu
School of Metallurgical Engineering, Xian University of Architecture and Technology, Xian 710055,C School of Metallurgical Science and Engineering, Central South University, Changsha 410083,China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
633-642
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）