Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (8): 1108-1112.DOI: 10.12068/j.issn.1005-3026.2016.08.010

• Materials & Metallurgy • Previous Articles     Next Articles

Effect of Iron Coke Hot Briquette on Softening-Melting and Dripping Properties of Blast Furnace Mixed Burden

WANG Hong-tao, CHU Man-sheng, ZHAO Wei, LIU Zheng-gen   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2015-07-22 Revised:2015-07-22 Online:2016-08-15 Published:2016-08-12
  • Contact: CHU Man-sheng
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Abstract: Through the experiment of softening-melting and dripping of iron ore with load reduction, the effect of iron coke hot briquette (ICHB) on softening-melting and dripping properties of blast furnace mixed burden was investigated. The results show that, with the increase of ICHB adding ratio, the softening temperature range is increased from 206.3℃ to 218.9℃, while the melting temperature range is decreased from 171.1℃ to 124.8℃. The cohesive zone becomes narrower and tends to move downwards. Besides, the dripping pressure drop is decreased. The dripping ratio is increased first and then decreases, the superior value of which is 40.58% when the ICHB ratio is 30%. In addition, S-value is decreased, which indicates that the permeability of mixed burden is improved. Therefore, a certain amount of ICHB is beneficial for improving softening-melting and dripping properties of mixed burden and the appropriate adding ratio of ICHB is about 30%.

Key words: iron coke hot briquette (ICHB), softening-melting and dripping property, mixed burden, CO2 emission reduction, blast furnace ironmaking

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