首秦焦炭碳素溶蚀能力与显微结构的相关性  

Relationship Between Carbon Dissolution and Microstructure of Coke in Shouqin

作　　者：马超[1] 晁伟[1] 李东涛[1] 刘洋[1] 徐萌[1] 徐荣广[1] 

机构地区：[1]首钢技术研究院,北京100043

出　　处：《钢铁》2014年第12期33-37,共5页Iron and Steel

摘　　要：捣固焦由于成本低且性能指标较好而逐步推广使用,然而首秦高炉在使用捣固焦后出现了炉内压量关系紧张、炉况不顺等问题。为了了解这批焦炭的实际性能,进行了反应性试验、差热试验以及光学组织含量分析,结果表明:焦炭光学组织中镶嵌结构有抑制裂纹发展和缓解热膨胀的作用,而捣固焦的镶嵌组织含量较低,因此在高温和冲击受力的作用下更容易产生裂纹;分析6种焦粉失重曲线可以发现,同性组分ΣISO含量高的捣固焦粉从1 000升高到1 300℃过程中汽化反应失重率增加更快,在炉内可能引起的粒度降解更严重,从而造成炉况不顺。Because of low cost and high performance index, the stamping coke had been gradually popularized and appli-cated. However, after using the stamping coke in the blast furnace of Shouqin, it appears several problems such as pressure instability and instable BF performance. In order to make out the actual properties of this batch of coke, the reactivity test, TG-DTA test and optical texture analysis were conducted. The results indicated some relations between optical texture con-tent and quality of cokes. The mosaic texture in the optical texture of coke had an effect on controlling the development of cracks and relieving thermal expansion. The content of mosaic texture in the stamping coke was lower, so it was more prone to generating the cracks in the condition of high temperature and impact. From the weight loss curves of six kinds of coke powder, it can be found that the gasification reaction rate of the stamping coke with highΣISO increased faster in the process of the temperature from 1 000 to 1 300℃. In that case, it is possible to cause more serious particle degradation, re-sulting in the instable BF performance.

关 键 词：焦炭 捣固焦 汽化反应 光学组织 气孔 

分 类 号：TF526.1[冶金工程—钢铁冶金]