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MOLTEN IRON PRETREATMENT METHOD, MOLTEN IRON PRETREATMENT CONTROL DEVICE, PROGRAM, AND RECORDING MEDIUM

机译:熔融铁预处理方法,熔融铁预处理控制装置,程序和记录介质

摘要

PROBLEM TO BE SOLVED: To precisely control P concentration in molten iron by properly adjusting Si concentration in the molten iron and to improve the production efficiency.;SOLUTION: In this molten iron pretreatment method, initial molten metal data which include initial concentrations of molten iron components including at least Si, Fe, and C, are acquired, Si concentration in the molten iron is sequentially estimated on the basis of the initial molten iron data, the time series exhaust gas data including the components and the flow rate of the exhaust gas discharged from the converter, and the limestone input data including the weight of the limestone charged into the converter, and the Si concentration in the molten iron is adjusted based on the difference between the estimated Si concentration and the target Si concentration in the molten iron. For the estimation of the Si concentration, applied is a complex reaction model combining a fire point reaction which is an oxidation reaction between molten iron and blowing oxygen supplied to the molten iron from an upward blown lance and a slag metal interfacial reaction which is a reaction at an interface between molten iron and slag and progresses in a region different from the fire point region where fire point reaction proceeds.;SELECTED DRAWING: Figure 4;COPYRIGHT: (C)2018,JPO&INPIT
机译:解决的问题:通过适当地调整铁水中的Si浓度来精确控制铁水中的P浓度并提高生产效率。解决方案:在这种铁水预处理方法中,初始铁水数据包括铁水的初始浓度获取至少包括Si,Fe和C的成分,基于初始铁水数据,包括该成分和废气流量的时间序列废气数据,依次估计铁水中的Si浓度。根据估算出的铁浓度和目标铁浓度之间的差来调节从转炉中排出的硅酸钙和输入到转炉中的石灰石的重量在内的石灰石输入数据和铁水中的硅浓度。为了估算Si浓度,应用了复杂的反应模型,该模型结合了燃烧点反应和炉渣金属界面反应,所述燃烧点反应是铁水和从向上吹过的喷枪供应到铁水的吹氧之间的氧化反应。在铁水与炉渣之间的界面处,并在与发生燃烧点反应的燃烧点区域不同的区域进行。;选定的图纸:图4;版权:(C)2018,JPO&INPIT

著录项

  • 公开/公告号JP2018095943A

    专利类型

  • 公开/公告日2018-06-21

    原文格式PDF

  • 申请/专利权人 NIPPON STEEL & SUMITOMO METAL;

    申请/专利号JP20160244516

  • 发明设计人 IWAMURA TAKESHI;

    申请日2016-12-16

  • 分类号C21C1/02;C21C1/04;C21C5/35;C21C5/46;

  • 国家 JP

  • 入库时间 2022-08-21 13:13:00

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