Influence of Coke Reactivity on Softening‐Melting Dropping Behavior of Iron‐Bearing Burden. Issue 9 (22nd December 2014)

• Record Type: Journal Article
• Authors: Tuo, Biyang; Wang, Jianli; Yao, Yanli; Yang, Junjie
• Is Part Of: Steel research international. Volume 86:Issue 9(2015:Sep.)
• Page Start: 1028
• Page End: 1036
• Publication Date: 2014-12-22
• Subjects: Steel -- Periodicals; Steel -- Metallurgy -- Periodicals; 669.142
• DOI: 10.1002/srin.201400314
• Languages: English
• ISSNs: 1611-3683

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="srin201400314-sec-0001" sec-type="section"> <p>The influences of the different reactivity cokes on softening‐melting dropping of iron‐bearing burden were studied by melting‐dropping experiment. The pressure difference and shrinkage rate of burden layer, as well as the burden reduction degree at the same temperature were also analyzed. The results show that the softening and melting starting temperature reduces from 1200 to 1160 °C, and the softening and melting end temperature increases from 1290 to 1320 °C, while the melting ending temperature is unchanged and the dropping temperature of molten iron reduces from 1413 to 1380 °C, when the coke reactivity increases from 24.76 to 65.16%. Softening‐melting temperature interval increases with the improvement of coke reactivity based on the above temperatures change, meanwhile, melting temperature interval and the dropping temperature interval (ΔT<sub>3</sub> = T<sub>d</sub> − T<sub>P</sub>) reduces, respectively. In addition, the shrinkage rate of charge column decreases and the permeability of charge column get better when the coke reactivity increases from 24.76 to 65.16%. The softening‐melting and dropping characteristic evaluation of iron‐bearing burden reduces with the improvement of coke reactivity. Appropriately increasing coke reactivity may improve charge column permeability and increase softening‐melting and dropping characteristic of iron‐bearing burden, therefore, it is of great significance for saving energy and reducing consumption of blast furnace smelting.</p> </sec> </abstract>