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中南大学学报(英文版)

Journal of Central South University

Vol. 13    No. 6    December 2006

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Effect of coke properties and its blending recipe on performances of carbon
anode for aluminium electrolysis
LIU Feng-qin(刘凤琴)1,2,LIU Ye-xiang(刘业翔)1,Mannweiler U3,Perruchoud R4

1.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China;
2.Zhengzhou Research Institute,CHALCO,Zhengzhou 450041,China;
3.Mannweiler Consulting,Hadlaubstrasse 71,CH-8006,Zuerich,Switzerland;
4.R&D Carbon Ltd.,P.O.Box 362,CH-3960,Sierre,Switzerland

Abstract:The properties and blending recipe of petroleum cokes used to make high quality carbon anodes for aluminium electrolysis were studied.Three kinds of green cokes were selected for bench scale study to illustrate the effects of cokes properties and its blending recipe on anode performances.The results show that impurities derived mainly from cokes remarkably affect the CO2 reactivity and air reactivity of carbon anodes.Ca,Na and V can increase CO2 reactivity of calcined cokes but S has the contrary effect,and the cokes of high V level generally present high air reactivity.The anodes with good quality can be made by properly selecting and scientifically blending of cokes,some poor quality cokes can also be used to produce high quality anodes with a
reasonable blending recipe.Na contaminated anodes have high CO2 reactivity and air reactivity,so the recycled anode butts should be well cleaned to reduce Na content before being introduced into anode production,which is especially important to the low S cokes.

 

Key words: petroleum coke    ;       blending recipe;quality;carbon anode,aluminium electrolysis

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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