Influence of operational parameters on silicon in hot metal from Corex
Influence of operational parameters on silicon in hot metal from Corex
复制标题
DOI：
10.1179/030192307x239588
复制
发表时间：
2008-02
影响因子：
2.1
通讯作者：
P. P. Kumar-P.;A. Dasu;M. Ranjan;T. Naha
中科院分区：
文献类型：
--
作者：
P. P. Kumar-P.;A. Dasu;M. Ranjan;T. Naha
以低成本生产优质钢需要具有低硅（Si）和低硫的上级质量的铁水（HM）。高硅对于炼钢过程中的后续处理是不期望的，使得该方法成本更高且生产率更低，因此一直在努力降低HM中的硅含量。Corex是唯一一种商业上成熟和成熟的熔融还原炼铁技术，可替代传统的高炉（BF）炼铁。虽然高炉中硅转移的机制已得到很大程度的了解，但Corex工艺仍需要进一步的操作指导来控制它。通过对一年多的生产数据进行统计分析，了解影响硅含量的参数，为预测和控制硅含量提供指导。基于对影响重质油中硅含量的参数的了解，进行了回归分析，并建立了预测Corex重质油中硅含量的方程。本文讨论了所涉及的各种参数，硅预测的回归输出，其验证及其与操作参数的相互关系。分析表明，由于高水分、金属化差、高挥发分、高渣量、高煤粉和低产量导致的高燃料比，以及炉渣中的高碱度和氧化铝沿着，导致HM中的高硅。
Quality steel production at low cost demands superior quality of hot metal (HM) with low silicon (Si) and sulphur. High silicon is undesirable for its subsequent treatment during steelmaking, making the process costlier and less productive, hence there have been constant efforts to lower the silicon content in HM. Corex is the only commercially established and proven smelting reduction ironmaking technology alterative to conventional blast furnace (BF) ironmaking. While the mechanism of silicon transfer is largely understood in the BF, the Corex process still requires further operational guidance for its control. A statistical analysis of more than one year plant data has been carried out to understand the parameters influencing the silicon content and to provide directions for its prediction and control. Based on the understanding of the parameters affecting the silicon in HM, regression analysis was carried out and equations have been developed to predict the silicon in Corex HM. The present paper discusses the various parameters involved, the regression output for silicon prediction, its validation and its interrelation with operating parameters. The analysis indicates that high fuel rates due to high moisture, poor metallisation, high volatile matter, high slag volume, high coal fines and low production, along with high basicity and alumina in slag lead to high silicon in HM.