260t转炉裸露可见底枪吹炼工艺及效果  

Blowing process and effect in 260 t BOFs with exposed visible bottom tuyeres

作　　者：田勇[1] 王鹏[1] 张志文[1] 齐志宇[1] 田文革[1] 

机构地区：[1]鞍钢股份有限公司炼钢总厂,辽宁鞍山114021

出　　处：《炼钢》2016年第5期11-14,53,共5页Steelmaking

摘　　要：通过对鞍钢股份有限公司260 t转炉底吹效果影响因素、底枪维护工艺的研究,提出了不同冶炼钢种合理的底吹强度,确定了合理的转炉炉底控制厚度,优化了转炉终渣成分和溅渣护炉工艺,同时采用底枪更换技术,实现了转炉底枪裸露可见,延长了底枪的底吹寿命,改善了转炉熔池的搅拌效果,采用2支底枪底吹时,使每个炉役具备复吹的炉数达到4 000炉以上,吹炼终点碳氧浓度积维持在小于0.002 7以下,炉役复吹比达到80%。Based on investigation of factors influencing bottom-blowing effect and tuyeres maintenance methods, the reasonable bottom-blowing intensity schemes were proposed for various steel grades, the suitable thickness of furnace bottom was determined and final slag composition and slag splashing process were optimized. The bottom tuyeres exchange technology was used to realize tuyeres exposing and visualization. Thus the tuyeres life was increased and molten pool stirring effect was improved. Now the bottom blowing system could guarantee carbon-oxygen product to be less than 0. 002 7 during 4 000 heats in one service life, and combined blowing rate to 80 % with 2 bottom tuyeres.

关 键 词：转炉炼钢 顶底复吹 底吹寿命 底枪维护 碳氧积 

分 类 号：TF729.3[冶金工程—钢铁冶金]