焙烧制度对熔剂性球团强度及冶金性能的影响  

EFFECT OF ROASTING SYSTEM ON FLUX PELLET STRENGTH AND METALLURGICAL PROPERTIES

作　　者：刘卫星 肖洪 化泽一 张文强 李杰 Liu Weixing;Xiao Hong;Hua Zeyi;Zhang Wenqiang;Li Jie(Comprehensive Test and Analysis Center,North China University of Science and Technology,Tangshan 063009,Hebei;Hebei Engineering Research Center of Iron Ore Optimization and Iron Pre-Process Intelligence,North China University of Science and Technology,Tangshan 063009,Hebei;HBIS Tangsteel Company,Tangshan 063009,Hebei)

机构地区：[1]华北理工大学综合测试分析中心,河北唐山063009 [2]华北理工大学铁矿石优选与铁前工艺智能化河北省工程研究中心,河北唐山063009 [3]河钢集团唐钢公司,河北唐山063009

出　　处：《河北冶金》2023年第5期7-12,31,共7页Hebei Metallurgy

基　　金：教育部产学合作协同育人项目(202102088005),河北省杰出青年科学基金项目(E2020209082)。

摘　　要：针对熔剂性球团低温还原粉化指数低、荷重软化性能差的问题,以唐钢生产的生球为对象,研究了焙烧温度和焙烧时间对熔剂性球团强度、低温还原粉化性能和荷重软化性能的影响规律。采用XGboost算法建立了焙烧温度和时间与球团低温还原粉化性能和荷重软化性能的优化预报模型。根据研究结果并结合唐钢现场情况和技术指标要求,优化推荐了熔剂性球团的两种焙烧制度:第一种现用焙烧温度不变,延长焙烧时间:具体为干燥段300℃、7.5 min,预热段1100℃、9 min,焙烧段温度等于或高于1230℃、焙烧时间等于或大于13 min;第二种现用焙烧时间不变,提高焙烧温度:具体为干燥段300℃、7.5 min,预热段1100℃、9 min,焙烧温度等于或高于1250℃、焙烧时间10 min。Aiming at the problems of low low reduction pulverization index and poor load softening performance of flux pellets,the effects of roasting temperature and roasting time on flux pellet strength,low-temperature reduction pulverization performance and load softening performance were studied.The XGboost algorithm was used to establish an optimized prediction model for roasting temperature and time,low-temperature reduction pulverization performance and load softening performance of pellets.According to the research results and combined with the on-site situation and technical index requirements of Tanggang,two roasting systems for flux pellets are optimized and recommended:the first type of current roasting temperature remains unchanged,and the roasting time is extended:specifically,the drying section is 300℃and 7.5 min,the preheating section is 1100℃and 9min,the roasting section temperature is equal to or higher than 1230℃,and the roasting time is equal to or greater than 13 min;The second type of current roasting time remains unchanged,and the roasting temperature is increased:specifically,the drying section is 300℃,7.5 min,the preheating section is 1100℃,9 min,the roasting temperature is equal to or higher than 1250℃,and the roasting time is 10 min.

关 键 词：熔剂性球团 低温还原粉化性能 荷重软化性能 XGboost模型 焙烧温度 焙烧时间 

分 类 号：TF046.6[冶金工程—冶金物理化学]