Laboratory study of property-modified prebaked carbon anode and application in large aluminum electrolysis cells

Abstract

A kind of complex additive mainly containing Al, Mg, F, and O was prepared. The synthetical performances of the property-modified prebaked anodes containing additives were tested in laboratory. On the basis of ideal testing results obtained, a large number of industrial prebaked property-modified anodes are prepared in a large-scale aluminum company. Further more, they are all used in 160 kA prebaked anode aluminum electrolysis cells. The statistic result show that, compared with common anodes, the property-modified ones enhance current efficiency by 0.78%, reduce energy consumption by 106.1 kW·h per ton aluminum and reduce carbon consumption by 11.6 kg per ton aluminum averagely.

Keywords

aluminum electrolysis / property-modified anodes / laboratory study / industrial application

References

[1] YinEn-sheng, LiuYong-gang, XiCan-min, et al.. Developing the GP-320 cell technology in China[A]. New O. Light Metals [C], 2001, Warrendale Pa, TMS: 213-218

[2] VanvorenC, HomsiP, BasquinJ L, et al.. AP 50: The pechiney 500 kA cell[A]. New O. Light Metals [C], 2001, Warrendale Pa, TMS: 221-226

[3] HardinE E, EllisP J, BeilharzC L, et al.. A comprehensive review of the effects of calcination at various temperatures on coke structure and properties-Part II [A]. Mannweilev U. Light Metals[C], 1994, Warrendale Pa, TMS: 571-581

[4] CosteB, SchneiderJ P. Influence of coke real density on anode reactivity consequence on anode baking[A]. Light Metals[C], 1994, Warrendale Pa, TMS: 583-591

[5] OlsenE, ThonstadJ. The behavior of mickel ferrite cermet materials as inert anodes[A]. Hale W. Light Metals[C], 1996, Warrendale, Pa, TMS: 369-376

[6] LIU Ye-xiang, LIU Xi-hang, WANG Hua-zhang, et al. Anode Paste and Directions of Producing[P]. Chinese Patent, 88104290.

[7] FengN X, ZhangM J, KaiG, et al.. Influence of lithium carbonate addition to carbon anodes in a laboratory aluminium electrolysis cell[J]. Carbon, 1991, 29(1): 39-41

[8] Yang J H, Liu Y X, Thonstad J, et al. On electrocatalysis of doped carbon anodes in aluminium electrolysis, Part I [J]. Aluminium, 1998(6): 720–725.

[9] Yang J H, Liu Y X, Thonstad J, et al. On electrocatalysis of doped carbon anodes in aluminium electrolysis, Part II [J]. Aluminium, 1998(7): 537–541.

[10] YangJiang-hong, LiuYe-xiang. Factors affecting anodic overpotential of carbon anodes in cryoltic-alumina melts[J]. Aluminum Transactions, 1999, 1(1): 537-541

[11] XiaoJin, YangJian-hong, LiuYe-xiang, et al.. Preperation of dopping carbon anode with mechanical method[J]. Journal of Central South University of Technology, 1998, 29(4): 341-343(in Chinese)

[12] HUANG Hua. The contrast and study of detecting method to CO₂ reaction rate[J]. Light Metals, 1999 (3): 46–50. (in Chinese)