工程科学学报2016，Vol.38Issue(4)：538-545,8.DOI:10.13374/j.issn2095-9389.2016.04.013
石油焦煅烧程度对铝用炭阳极显微结构及电解消耗的影响
Impact of coke calcination levels on the microstructure and consumption of carbon anodes in aluminum electrolysis
摘要
Abstract
Carbon anodes for aluminum electrolysis were made of different calcination levels of coke as an aggregate and coal pitch as a binder. The porous structure parameters of carbon anode materials were characterized by using laser confocal scanning microscopy and the image analysis method. The anodic reaction and electrolysis consumption were also investigated in a lab scale aluminum elec-trolysis cell. The results demonstrate that the micropores gradually extend to crack-like macropores along the aggregate- binder inter-face with increasing coke calcination levels. The porosity, aspect ratio and connectivity first decrease and then increase, while the spe-cific surface area decreases. It is appropriate to reduce the crystallite height of calcined cokes to 1. 9 nm, so that the corresponding an-odes can have the air reactivity of 9. 6%, the CO2 reactivity of 3. 0%, and the anode consumption of 355. 4 kg per ton aluminum. The excessive consumption mechanism for the low calcined anode cokes may change from selective consumption of the binder to co-con-sumption of both the aggregate and the binder, which can reduce the carbon dust and the total carbon consumption in aluminum elec-trolysis.关键词
铝电解/石油焦/煅烧/阳极/消耗Key words
aluminum electrolysis/coke/calcination/anodes/consumption分类
矿业与冶金引用本文复制引用
冯鲁兴,薛济来,方宁,郎光辉,林日福,包崇爱..石油焦煅烧程度对铝用炭阳极显微结构及电解消耗的影响[J].工程科学学报,2016,38(4):538-545,8.基金项目
高等学校博士学科点专项科研基金资助项目(20110006110003) （20110006110003）
