热轧镀锡基板MR T-4CA的生产实践

Production Practice of Hot Rolled Tinplate MR T-4CA

基于成分和工艺设计,介绍了2050 mm热轧钢卷生产线开发热轧镀锡基板MR T-4CA的技术要点。通过KR预处理系统两扒一脱处理工艺、转炉废钢加入制度优化、转炉吹炼造渣和底吹控制、RH处理模式选择、连铸全保护浇注、结晶器流场优化等措施,减少铸坯边部裂纹、角部裂纹和气泡等缺陷,改善铸坯质量;根据不同规格制定轧制工艺,加强现场设备管理,生产的热轧钢卷表面质量及产品性能稳定,满足客户需求。

On the basis of composition and process design,the technical keypoints of developing hot rolled tin plated substrate MR T-4CA in 2050 mm hot rolling coil line are introduced.By taking measures such as double deslagging and single desulfurizing process of KR pretreatment system,optimization of converter scrap addition system,slag forming and bottom blowing control in converter blowing,RH mode selection,shroud casting,mould flow field optimization,the slab defects including edge crack,corner crack and bubble are reduced,which improves the slab quality.Rolling processes are developed according to different specifications,the field equipment management is strengthened,the surface quality and properties of hot rolled coil produced are stablised,which satisfies the customer's requirements.