低硅炼铁工艺下铁沟用工作衬的改进研究  

Improvement Research on Working Lining for Iron Ditch under Low Silicon Ironmaking Process

作　　者：张俊峰 Zhang Junfeng(Sinosteel Shijiazhuang Engineering Design&Research Institute Co.,Ltd.,Shijiazhuang Hebei 050000,China)

机构地区：[1]中钢石家庄工程设计研究院有限公司,河北石家庄050000

出　　处：《山西冶金》2024年第9期42-43,46,共3页Shanxi Metallurgy

摘　　要：高炉低硅工艺铁水黏度较低且流动性强,加剧了主铁沟位置侵蚀和冲刷问题,为提高铁沟使用寿命,对铁沟用耐火材料工作衬进行改进研究。在原铁沟浇注料配比上,铁线浇注料外加质量分数为10%的电熔致密刚玉,渣线浇注料外加质量分数为4%的β-Si_(3)N_(4)粉,能有效提高抗侵蚀和冲刷能力。铁沟浇注料配比优化方案在河北某低硅炼铁高炉实施应用,同时调整主沟坡度。应用结果表明:主铁沟渣铁线部位抗侵蚀和冲刷能力提高,解决了以往渣铁线侵蚀不同步、接触部位出现凹槽问题,一次性通铁量提升至15万t,安全经济效益显著。The low silicon process of blast furnace has low viscosity and strong fluidity of molten iron,which exacerbates the erosion and scouring problems at the main iron groove position.In order to improve the service life of the iron groove,research is conducted on the improvement of refractory working lining for the iron groove.In the original iron ditch casting material ratio,adding 10% dense fused alumina to the iron wire casting material and 4% β-Si_(3)N_(4)powder to the slag wire casting material can effectively improve the resistance to erosion and scouring.The optimization plan for the proportion of castable in the iron ditch has been implemented and applied in a low silicon ironmaking blast furnace in Hebei Province,while adjusting the slope of the main ditch.The application results show that the erosion resistance and scouring ability of the slag iron wire in the main iron ditch have been improved,solving the problems of asynchronous erosion of slag iron wire and grooves in the contact area in the past.The one-time iron throughput has been increased to 150 000 tons,and the safety and economic benefits are significant.

关 键 词：高炉 低硅炼铁 铁沟 工作衬 

分 类 号：TF321.7[冶金工程—冶金机械及自动化]