配加细磨烧结粉矿对带式焙烧机球团质量的影响  

Effect of adding grinded sintering powder ore on pellet quality of belt roasting machine

作　　者：智谦[1,2] 张福明 韩志国 张卫华[1] ZHI Qian;ZHANG Fuming;HAN Zhiguo;ZHANG Weihua(Beijing Shougang International Engineering Technology Co.,Ltd.,Beijing 100043,China;Beijing Metallurgical 3-D Simulation Design Engineering Technology Research Center,Beijing 100043,China;Shougang Group Co.,Ltd.,Beijing 100041,China)

机构地区：[1]北京首钢国际工程技术有限公司,北京100043 [2]北京市冶金三维仿真设计工程研究中心,北京100043 [3]首钢集团有限公司,北京100041

出　　处：《中国冶金》2024年第2期35-41,95,共8页China Metallurgy

基　　金：国家重点研发计划资助项目(2017YFB0304300)。

摘　　要：为充分发挥带式焙烧机原料适应性强的优势,同时降低球团生产成本,将粗颗粒的烧结粉矿经闭路磨矿工艺处理至一定粒度和水分后,与磁铁精矿配合使用作为球团生产原料,通过工业试验考察其对带式焙烧机球团生产线生球和成品球的影响。试验结果表明,在麦克粉比例小于30%时,可保证细磨矿粒度小于0.074 mm(200目)以下的比例大于90%,滤饼水分小于9%,能满足球团生产原料要求。生球落下次数和抗压强度随细磨矿配比增加而提高,配加细磨矿可减少球团膨润土使用量,提高球团铁品位。配加细磨烧结粉会降低成品球的抗压强度,但对还原度和低温还原粉化率无明显影响。综合来看,巴西卡粉、托克粉、麦克粉按4∶3∶3的比例混磨后过滤,得到的细磨矿以40%的比例添加到球团原料中,为理想的配矿方案,有助于降低球团生产成本。In order to give full play to the advantages of raw material strong adaptability of the belt roasting machine and reduce the production cost of pellets,the coarse sintering powder ore was treated to a certain particle size and moisture by closed-circuit grinding process,and used in combination with magnetite concentrate as raw material for pelletizing production.The influence of green ball and roasted ball on the pellet production line of belt roasting machine was investigated through industrial test.The test results show that when the proportion of MAC fines is less than 30%,it can be ensured that the proportion of fine grinding particle with size less than 0.074 mm(200 mesh)is more than 90%,and the water content of filter cake is less than 9%,which can meet the raw material requirements of pellet production.The drop times and compressive strength of green ball are enhanced with the increasing of grinded-fine ratio.The addition of grinded-fine can reduce the amount of bentonite and improve the iron grade of pellets.The addition of grinded-fine will reduce the compressive strength of roasted ball,but has no obvious effect on the reduction degree and low temperature reduction pulverization rate.In summary,an ideal ore blending scheme is that SFCJ powder,SSFS powder and MAC powder are mixed at the ratio of 4∶3∶3 and filtered,and then the grinded-fine obtained is added to the pellet raw materials at the ratio of 40%,which can reduce the production cost of pellet.

关 键 词：烧结粉矿 磨矿 带式焙烧机 球团 配矿 

分 类 号：TF046.6[冶金工程—冶金物理化学]