COREX风口破损原因及对策分析  

Analyzing on COREX Tuyere-Damaged Reasons and Solutions

作　　者：田广亚[1] 李京社[2] 杨宏博[2] 

机构地区：[1]宝钢工程技术集团有限公司,上海201900 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁研究学报》2013年第10期25-30,共6页Journal of Iron and Steel Research

摘　　要：对宝钢COREX-3000风口破损现象进行了分析研究,得出风口破损是高温熔损和气流冲刷磨损共同作用的结果。通过对COREX风口燃烧区热分布的分析,提出可以从5个方面采取措施减少高温熔损,延长风口寿命。基于以上研究,宝钢采用了使用宝钢小块焦代替部分山西焦和氧气氮气混合鼓风代替纯氧鼓风的措施,有效改善了风口使用寿命;同时,全面分析了该改进措施对COREX所产生的影响。分析结果表明:宝钢小块焦的使用改善了炉料的透气性,避免了风口燃烧区的热量聚集;氧气氮气混合喷吹减少了风口燃烧区的热量产生量、降低了气流的导热能力,同时在风口表面形成了氮化碳保护薄层,从而起到保护风口、延长风口使用寿命的作用。The tuyere-damaged phenomenon of COREX-3000 was investigated, and the conclusion was found that the combined effect of both melting loss under high temperature and scouring abrasion by high speed air flow led to the damage of tuyeres. The methods from five aspects were proposed to reduce the dilapidation of turyere through analyzing thermal distribution of COREX tuyere combustion zone. Based on that above, the measures that small coke was chosen as substitutes for part of Shanxi coke and oxygen-nitrogen blending injection replaced the oxygen injection were taken by Baosteel, which effectively prolonged the working life of tuyere.Besides, the effects of the measures above on COREX were analyzed in detail, and the following results show.. Using Baosteel small coke improved the burden permeability to avoid that heat is gathered in tuyere combustion zone; Oxygen-nitrogen blending injection reduces heat production in tuyere combustion zone, lowers the heat conduction ability of air flow, and forms one thin carbon nitride protective layer on tuyere surface to prolong the working life of tuyere.

关 键 词：风口破损 氧气氮气混合喷吹 氮化碳 

分 类 号：TF573.7[冶金工程—钢铁冶金]