无黏结剂球团矿低成本生产关键技术应用  

Key technology and application for low-cost production of binder-free pellets

作　　者：胡守景 秦立浩 姚永宽[1] 高式林 方磊 朱德庆[2] 杜刚 邓睿 赵建明 李宝忠 HU Shoujing;QIN Lihao;YAO Yongkuan;GAO Shilin;FANG Lei;ZHU Deqing;DU Gang;DENG Rui;ZHAO Jianming;LI Baozhong(Nanjing Steel Group Co.,Ltd.,Nanjing 214000,Jiangsu,China;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;Mountop Group Co.,Ltd.,Nanjing 211112,Jiangsu,China;Sinosteel Equipment Co.,Ltd.,Beijing 100080,China;Chengdu Leejun Industrial Co.,Ltd.,Chengdu 610045,Sichuan,China;HBIS Laoting Steel Co.,Ltd.,Tangshan 063600,Hebei,China)

机构地区：[1]南京钢铁集团有限公司,江苏南京214000 [2]中南大学资源加工与生物工程学院,湖南长沙410083 [3]大峘集团有限公司,江苏南京211112 [4]中钢设备有限公司,北京100080 [5]成都利君实业股份有限公司,四川成都610045 [6]河钢乐亭钢铁有限公司,河北唐山063600

出　　处：《烧结球团》2025年第1期61-68,共8页Sintering and Pelletizing

基　　金：中国宝武低碳冶金创新基金资助项目(BWLCF202216)。

摘　　要：南钢带式焙烧机球团生产线首创的4×10^(6)t/a规模的立式干法磨矿系统于2023年11月投入运行,烧结粗粉经过干法磨矿后,成球性、球团焙烧性能等均得到显著改善。此外,在干法磨矿的基础上,通过优化配矿和球团焙烧制度,改善生球热稳定性,生产出w(TFe)为63.5%、w(SiO_(2))为4.7%、碱度为0.15,抗压强度维持在2500 N/P以上,冶金性能优异[还原度为80%、低温还原粉化指数(>3.15 mm)为96%、还原膨胀指数为18%]的优质球团矿,实现了酸性球团矿无黏结剂生产的关键技术开发和应用。该技术的成功应用,可降低黏结剂成本6400万元/a,同时使球团铁品位成本低于烧结矿1.83元/t,创造了显著的经济效益。The 4×10^(6)t/a vertical dry grinding system,pioneered by Nanjing Steel Group’s straight grate pellet production line,is put into operation in November 2023.After dry grinding,the ball formation and pellet roasting performance of the sintered coarse powder are significantly improved.In addition,on the basis of dry grinding,by optimizing the ore blending and pellet roasting system and improving the thermal stability of the green pellet,the high-quality pellets are produced,which have a w(TFe)of 63.5%,a w(SiO_(2))of 4.7%,a basicity of 0.15,a compressive strength of over 2500 N/P,and excellent metallurgical properties[reduction degree 80%,low-temperature reduction pulverization index(>3.15 mm)96%,and reduction expansion index 18%],and realize the development and application of key technologies for the binder-free production of acidic pellets.The successful application of this technology can reduce the binder cost by 64 million yuan per year,and at the same time make the iron grade cost of pellets 1.83 yuan/t lower than that of pellet,creating significant economic benefits.

关 键 词：带式焙烧机 立式干法磨矿 球团矿 黏结剂 

分 类 号：TF046.6[冶金工程—冶金物理化学]