文献类型：期刊文献

中文题名：氧化铁对焦炭溶损反应的影响

英文题名：Influence of iron oxide on coke solution loss reaction

作者：黄丹丹[1];曹银平[2];宋俐蓉[1];余国普[2];黄婕[1]

机构：[1]华东理工大学化工学院,上海200237;[2]宝山钢铁股份有限公司炼铁厂,上海200941

年份：2015

卷号：34

期号：2

起止页码：330

中文期刊名：化工进展

外文期刊名：Chemical Industry and Engineering Progress

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：氧化铁;焦炭;反应性;吸附;影响机理

外文关键词：iron oxide;coke;reactivity;adsorption;mechanism of effect

摘要：在井式硅钼棒电炉中对焦炭溶损反应性进行研究,考察了反应条件(CO2流量、反应时间)并重点研究负载氧化铁对焦炭溶损反应性的影响;通过扫描电子显微镜(SEM)和电子能谱(EDS)对反应前后负载氧化铁的焦炭进行分析,探究氧化铁负载方式对焦炭溶损反应影响差异的原因,并进一步分析比较其影响机理。结果表明:焦炭溶损反应性随CO2流量和反应时间的增加而增大;以吸附法和添加法负载氧化铁对焦炭溶损反应均有促进作用,氧化铁吸附负载量存在一个饱和点(1%),超过该点后氧化铁吸附负载量对焦炭溶损反应性影响甚微;吸附法负载氧化铁对焦炭溶损反应性的影响大于添加法。SEM分析表明:添加法的部分铁氧化物被焦炭气孔壁基质包裹而无法发挥作用,吸附法的氧化铁均匀分布在焦炭表面使其能提供更多有效催化活性中心;且添加氧化铁时铁氧化物参与成焦,影响焦炭结构从而对焦炭溶损反应产生影响,吸附氧化铁则是影响焦炭溶损反应的催化作用,两种负载方式下氧化铁的影响机理不同。
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.