烧结用硼镁精粉的研究及工业应用  

Research and industrial application of boron magnesium concentrate powder for sintering

作　　者：刘建波 张俊杰 王博文 刘艺 江银伟 韩浩哲 LIU Jianbo;ZHANG Junjie;WANG Bowen;LIU Yi;JIANG Yinwei;HAN Haozhe(Zenith Steel Group(Nantong)Co.,Ltd.,Nantong 226000,Jiangsu,China)

机构地区：[1]中天钢铁集团南通有限公司,江苏南通226000

出　　处：《烧结球团》2025年第1期54-60,125,共8页Sintering and Pelletizing

摘　　要：为了更好地利用低价的硼镁铁矿资源,提高烧结原料供应的稳定性,本文对硼镁精粉的烧结性能进行配矿试样研究。研究结果表明:在现有的烧结原料和工艺情况下,当硼镁精粉配加质量分数由4%提升到8%时,有利于改善烧结过程透气性,烧结矿低温还原粉化指数(>3.15 mm)呈下降趋势,还原性呈略微上升,转鼓强度有所下降,烧结矿粒级呈现下降的趋势,综合炉料的软熔滴落性能变差;在硼镁精粉配加质量分数≤6%的情况下,能满足高炉生产指标要求。配加6%的硼镁精粉后,工业应用结果显示:烧结负压整体有所下降且相对较为平稳,烧结矿转鼓强度有所下降,从冶金性能指标上看,配加硼铁精粉后还原性略微增加,低温还原粉化指数(>3.15 mm)由74.19%降至69.28%。该烧结矿应用于高炉生产后出现风量变化不大,压差略有上升,高炉其它指标保持良好,后续可持续配入,作为降本增效的手段。In order to make better use of low-cost boro-magnesium ore resources and improve the stability of supplying the sintering raw materials,some ore blending samples for the sintering performance of boron magnesium concentrate powder are studied.The results show that,under the existing sintering raw materials and processes,when the mass fraction of boron magnesium concentrate powder is increased from 4%to 8%,it is helpful to improving the air permeability of the sintering process,the low-temperature reduction pulverization index(>3.15 mm)of sintered ore shows a downward trend,the reducing property increases slightly,the drum strength decreases,the sinter particle size shows a downward trend too,and the soft melt dripping performance of the comprehensive charge deteriorates.When the mass fraction of boron magnesium concentrate powder is≤6%,it can meet the requirements of blast furnace production index.After adding 6%boron magnesium concentrate powder,the industrial application results show that,the overall negative pressure of sintering decreases and keeps relatively stable,the strength of the sinter drum decreases;while,from the perspective of metallurgical performance index,the reducibility increases slightly after adding boron magnesium concentrate powder,and the low-temperature reduction pulverization index(>3.15 mm)decreases from 74.19%to 69.28%.After this sintered ore is used for blast furnace production,the air volume does not change much,the pressure difference increases slightly and the other indicators of the blast furnace remains well.The following continuous allocation can be used as a means to reduce costs and increase efficiency.

关 键 词：烧结 硼镁精粉 冶金性能 转鼓强度 熔滴性能 降本增效 

分 类 号：TF046.4[冶金工程—冶金物理化学]