Large-scale BF is the tendency of domestic and foreign Iron-making technology.Due to the limit of resource,technology and equipment,we can not reach the planned goal after putting the big BF into production,it is of g...Large-scale BF is the tendency of domestic and foreign Iron-making technology.Due to the limit of resource,technology and equipment,we can not reach the planned goal after putting the big BF into production,it is of great significance to explore the key technologies again for the sound development of the large-scale BF.The paper highlights the unique advantages of large-scale BF and the practical performance of BFs in Baosteel,and explores the related parameter choice,comprehensively matched longevity technology optimization and tapping-stability improvement in terms of structure-design,longevity and equipments etc.The author stresses BF centered basic working regulation,hoping it can exert positive effect on the scientific development of large scale BF in China.展开更多
Effect of distribution of iron concentrates between pelletized and matrix feed on the preparation of blast furnace burdens from two different kinds of fine iron concentrates (magnetite and hematite) by composite agglo...Effect of distribution of iron concentrates between pelletized and matrix feed on the preparation of blast furnace burdens from two different kinds of fine iron concentrates (magnetite and hematite) by composite agglomeration process (CAP) was explored. It was found that when the mass ratio of iron concentrate A (magnetite) to iron concentrate B (hematite) in the mixed feed was constant, the proportion of iron concentrate A in the pelletized and matrix feed significantly affected the quality of CAP products. Particularly, as the proportion of iron concentrate A in the pelletized feed increased from 0 to 100%, the yield decreased from 82.11% to 79.19% and the tumbler index decreased from 71.33% to 68.27%. The mineralization characterization results indicated that when 100% iron concentrate A was used as the pelletized feed, the crystallization styles of the outer layer and the inner layer of the pellet were different, and a lot of pores exist around hematite and magnetite phases in the pelletized part, with the weak connection of pelletized and matrix part, resulting in poor strength of agglomeration product.展开更多
由于炼铁中的高炉(Blast Furnace,BF)是一个非线性动力学过程,具有复杂的物理化学反应。在高炉操作中,铁水温度以及各微量元素是最基本的质量指标。根据实际的工艺流程进行建模、结合实测的原料指标来控制高炉上料过程,当前的锰铁高炉...由于炼铁中的高炉(Blast Furnace,BF)是一个非线性动力学过程,具有复杂的物理化学反应。在高炉操作中,铁水温度以及各微量元素是最基本的质量指标。根据实际的工艺流程进行建模、结合实测的原料指标来控制高炉上料过程,当前的锰铁高炉的自控系统采用计算机建模驱动PLC控制单元实现原料的自动补充。基于最小二乘支持向量机的非线性子空间识别方法建立了预测MIQ(Molten Iron Quality)指标的Hammerstein模型,降低了计算复杂度,提升了产品的MIQ指数,提升了PLC自动上料控制系统地工作效率。展开更多
文摘Large-scale BF is the tendency of domestic and foreign Iron-making technology.Due to the limit of resource,technology and equipment,we can not reach the planned goal after putting the big BF into production,it is of great significance to explore the key technologies again for the sound development of the large-scale BF.The paper highlights the unique advantages of large-scale BF and the practical performance of BFs in Baosteel,and explores the related parameter choice,comprehensively matched longevity technology optimization and tapping-stability improvement in terms of structure-design,longevity and equipments etc.The author stresses BF centered basic working regulation,hoping it can exert positive effect on the scientific development of large scale BF in China.
基金supported by the National Natural Science Foundation of China under Grant U1960114,51774337,and U1660206the Open Sharing Fund for the Large-scale Instruments and Equipments of Central South University under Grant CSUZC201905the Fundamental Research Funds for the Central Universities of Central South University under Grant 2018zzts220.
文摘Effect of distribution of iron concentrates between pelletized and matrix feed on the preparation of blast furnace burdens from two different kinds of fine iron concentrates (magnetite and hematite) by composite agglomeration process (CAP) was explored. It was found that when the mass ratio of iron concentrate A (magnetite) to iron concentrate B (hematite) in the mixed feed was constant, the proportion of iron concentrate A in the pelletized and matrix feed significantly affected the quality of CAP products. Particularly, as the proportion of iron concentrate A in the pelletized feed increased from 0 to 100%, the yield decreased from 82.11% to 79.19% and the tumbler index decreased from 71.33% to 68.27%. The mineralization characterization results indicated that when 100% iron concentrate A was used as the pelletized feed, the crystallization styles of the outer layer and the inner layer of the pellet were different, and a lot of pores exist around hematite and magnetite phases in the pelletized part, with the weak connection of pelletized and matrix part, resulting in poor strength of agglomeration product.
文摘由于炼铁中的高炉(Blast Furnace,BF)是一个非线性动力学过程,具有复杂的物理化学反应。在高炉操作中,铁水温度以及各微量元素是最基本的质量指标。根据实际的工艺流程进行建模、结合实测的原料指标来控制高炉上料过程,当前的锰铁高炉的自控系统采用计算机建模驱动PLC控制单元实现原料的自动补充。基于最小二乘支持向量机的非线性子空间识别方法建立了预测MIQ(Molten Iron Quality)指标的Hammerstein模型,降低了计算复杂度,提升了产品的MIQ指数,提升了PLC自动上料控制系统地工作效率。
