摘要
采用醋酸锌水溶液浸泡法制备了不同锌含量的综合炉料(65%烧结矿+21%球团矿+14%块矿),通过初渣形成实验及对滴落物的化学分析,研究了有害元素锌对高炉初成渣形成过程的影响。结果表明,铁矿石中锌含量增高会导致滴落温度升高,软熔温度区间加宽,透气阻力指数增大,压差波动频繁,并且当炉料加锌量超过一定限度时,滴落初渣中(Zn)含量明显增大。这意味着,高炉锌负荷增加将导致软熔带变厚、透气性恶化以及压差不稳定,并且可能会加剧锌对高炉下部的破坏作用。
By means of zinc acetate aqueous solution soaking method,the combined iron ores(65%sinter+21%pellet+14%lump ore)with different zinc contents were prepared.The effects of hazardous zinc element on the primary slag formation process in blast furnace were studied through the primary slag formation experiment and chemical analysis of the dropped materials.The results show that the increase of zinc content in iron ore will lead to the rise of dropping temperature,widening of soften-melting temperature interval,increase of permeability resistance index,and frequent fluctuation of pressure drop.Moreover,when the zinc addition in the charge exceeds a certain limit,the zinc content of dropped primary slag increases significantly,which means that the increase of zinc load in blast furnace will result in the thickening of cohesive zone,deterioration of air permeability and unstable pressure difference,and may also exacerbate the destructive effect of zinc on the lower part of blast furnace.
作者
周进东
李九林
竺龙
Zhou Jindong;Li Jiulin;Zhu Long(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology,Wuhan 430081,China;Ironmaking Plant of Daye Special Steel Co.,Ltd,Daye 435001,China)
出处
《武汉科技大学学报》
CAS
北大核心
2020年第4期241-246,共6页
Journal of Wuhan University of Science and Technology
基金
国家自然科学基金资助项目(51604199)
武汉科技大学青年科技骨干培育计划资助项目(2016xz003).
关键词
锌
高炉
锌负荷
初成渣
软熔带
滴落带
zinc
blast furnace
zinc load
primary slag
cohesive zone
dropping zone
