COREX-3000风口破损的原因分析和对策  

Cause analysis of tuyere breakage of COREX-3000 and Countermeasures

作　　者：熊林[1] 朱锦明[2] 李建[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900 [2]宝山钢铁股份有限公司炼铁厂,上海200941

出　　处：《宝钢技术》2011年第6期24-28,共5页Baosteel Technology

摘　　要：宝钢1#COREX-3000投产以来,风口破损较为频繁,对COREX-3000生产的稳定及产量带来了很大的影响。从COREX纯氧鼓风工艺特点、风口氧气流速、单风口熔炼率、风口通氮、出铁制度、焦炭比例和生产工况等方面进行了分析,分析结果显示,COREX风口破损的主要原因是由于风口理论燃烧温度高,风口前端焦炭和半焦粒度小,透气透液性能较差,导致风口前端氧气孔道高温熔化或磨损扩孔,出现漏水现象而破损。通过适度降低风口氧气流速和单风口熔炼率、风口添加氮气、稳定炉况和优化出铁制度可以有效减少风口破损数。Since the No. 1 COREX -3000 was put into production in Baosteel, its tuyere has been broken frequently, which affects the stability and production of the new process. Many aspects of the COREX have been studied, such as its pure oxygen blast technology, oxygen velocity at tuyere, melting rate of the single tuyere, tapping scheme, coke rate and production conditions. The analytical results indicate that the main causes of the tuyere breakage lie in small size of coke and semicoke particles at the front part of tuyere and poor permeability of gas and liquid, which were caused by the high temperature of combustion （theoretically） at tuyere. All these led to the meltdown or wear or chambering of the oxygen duct at tuyere, causing water leakage and tuyere breakage. Through adding tuyere nitrogen, moderately reducing tuyere oxygen velocity and melting rate of the single tuyere, stabilizing furnace conditions and optimizing the tapping scheme, the number of tuyere breakage can be reduced effectively.

关 键 词：COREX-3000 风口破损 风口理论燃烧温度 

分 类 号：TF557[冶金工程—钢铁冶金]