熔融体系中石墨电极表面生成抗氧化合金层的动力学  

KINETICS OF AN ALLOY LAYER GROWTH ON THE SURFACE OF GRAPHITE ELECTRODE IN A MOLTEN MIXTURE

作　　者：戴星[1] 刘洪勤[1] 

机构地区：[1]北京科技大学冶金系,北京100083

出　　处：《化工学报》1994年第2期212-217,共6页CIESC Journal

摘　　要：熔融体系中采用表面合金化方法可在石墨电极表面形成一结构致密且具有良好导电性的抗氧化碳化物合金保护层,在电弧炉炼钢生产中能有效地降低电极消耗。本文研究了这一过程中表面合金层的形成和生长机制,提出碳原子在合金层中的非稳态固相扩散为该过程的控制步骤,并由此导出合金层的生长动力学数学模型。模型计算值与实验结果能很好吻合。A conducting oxidation-resistant carbide alloy layer can be formed on the surface of graphite electrode by means of the surface alloying method in a molden mixture. This compact layer can effectively reduce the consumption of graphite electrode due to carbon oxidation during arc furnace steelmaking. The process of alloy layer growth is found to be controlled by the non-steady state solid phase diffusion of carbon atom. A kinetic model was established thereupon. The model prediction is in good agreement with experimental data.

关 键 词：石墨电极 抗氧化 合金层 熔融 电极 

分 类 号：O646.5[理学—物理化学]