关键词: 氧化铁, 焦炭, 反应性, 吸附, 影响机理

Abstract: Coke solution loss reactivity was investigated in the well type Si-Mo electric furnace. The influence of reaction conditions,such as carbon dioxide flow rate and reaction time on coke solution loss reactivity were studied,and the effect of loading iron oxide was discussed. The cokes loaded with iron oxide were analyzed by SEM and EDS before and after reaction to explore the reason for how iron oxide loading way affected coke solution loss reaction,and different mechanisms were discussed. Coke solution loss reactivity increased with increasing carbon dioxide flow rate and reaction time. Loading iron oxide by adsorption or addition had a positive effect on coke solution loss reactivity. There was an saturation point (1%)of iron oxide loading by adsorption. Loading iron oxide by adsorpton beyond this point could only slightly enhance its effect on the reactivity. Loading iron oxide by adsorption had a greater impact on coke solution loss reaction than by addition. SEM analysis indicated that part of iron oxide loaded by addition was enclosed by coke pore matrix and could not work,while iron oxide loaded by adsorption could be evenly distributed on coke surface to provide more effective catalytic active centers. Iron oxide loaded by addition participated in coke making,and affected coke structure and in turn affected its solution loss reaction. Iron oxide loaded by adsorption affected catalytic function of the reaction. The mechanisms of effect for these two loading ways were different.

Key words: iron oxide, coke, reactivity, adsorption, mechanism of effect