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| Ore-blending optimization model based on liquid phase formation characteristics of iron ore fines |
| YAN Bing-ji1，ZHANG Jian-liang1，YAO Chao-quan1，SUN Hai-ning2，ZHANG Ya-peng1，LI Ke-jiang1 |
（1. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China
2. Ironmaking Plant， Tianjin Iron and Steel Group Co.， Ltd.， Tianjin 300301， China） |
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Abstract In order to reduce the cost of sinter production， an ore-blending optimization model was proposed based on the fact that the liquid phase formation characteristic of various types of iron ore fines was complementary to each other. Besides， the constraints in this model were the sinter chemical composition， liquid phase formation characteristics of blended iron ore fines， and the storage amount of iron ore fines. The first step was to determine the chemical composition as well as the liquid phase formation characteristics for all the selected six kinds of iron ore fines. Then simplex algorithm was employed to obtain the ore-blending optimization scheme. In addition， sintering cup experiments as both the optimization scheme and the current scheme were conducted for comparison. The results showed that compared with the current scheme， the scheme after optimization was capable of reducing the cost of sinter production by 12.35 RMB per ton sinter. Moreover， the metallurgical properties of the obtained sinter were improved. Among these properties， the reducibility was improved 2.86%； the reduction degradation index (RDI) was increased by 0.87%； the temperature range of cohesive zone was decreased by 25 oC and the temperature range of the dripping zone was decreased by 6 ℃. Therefore， the ore-blending model established was proved to be effective.
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Received: 03 November 2014
Published: 11 June 2015
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2015, Vol. 50 
