Fe—Cr—O体系碳还原产物的形态  

Morphology of products from the carbon reduction of Fe-Cr-O systems

作　　者：刘洋[1,2] 张延玲[1,2] 魏文洁[1,2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]钢铁冶金新技术国家重点实验室,北京100083

出　　处：《北京科技大学学报》2014年第2期167-176,共10页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(51074025);北京科技大学钢铁冶金新技术自主研发课题(41602005)

摘　　要：研究了不同温度和不同时间条件下C还原Fe--Cr--O体系所得产物的形态,样品主要包括FeCr2O4+C和Fe2O3+2Cr2O3+C两种体系.两种样品的还原度均随温度升高而升高,反应接近平衡时还原率均在90%以上.C还原FeCr2O4和Fe2O3--Cr2O3的过程大致相同,且最终还原产物基本组成均为Fe--Cr--C合金和金属碳化物(主要为Cr7C3).针对最终还原产物中Fe--Cr--C合金和金属碳化物的含量提出了一种估算方法,其估算结果与理论计算结果基本吻合.结果显示,最终产物中Fe--Cr--C合金量随温度升高而升高,碳化物含量随温度升高而降低,且不同温度条件下所获得的Fe--Cr--C合金成分不同.The morphology of the reduction products of Fe-Cr-O systems by C at different temperatures and time intervals was stud-ied in this paper. The samples include two systems of FeCr2 O4 ＋C and Fe2 O3 ＋2Cr2 O3 ＋C. It is found that the reduction degrees of the two samples increase with increasing temperature, and the reduction degree can be above 90% when the reaction is close to balance. The reduction processes of FeCr2 O4 and Fe2 O3-Cr2 O3 are similar and the final reduction products are composed of Fe-Cr-C alloys and metal carbides （ mainly Cr7 C3 ） . A method was proposed to estimate the contents of Fe-Cr-C alloys and metal carbides in the final reduction products, and the estimated results agree with the calculated data. It is shown that the content of Fe-Cr-C alloys increa-ses while the content of metal carbides decreases with increasing temperature, and the composition of Fe-Cr-C alloys varies with temper-ature.

关 键 词：冶金粉尘 铬铁 碳还原 产物 形态 

分 类 号：TF641[冶金工程—钢铁冶金]