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| Feasibility research of injection of BF dust into melter gasifier of COREX |
| WANG Hai-yang1，ZHANG Jian-liang1，WANG Guang-wei1，LI Tao2，JIANG Xi3，4 |
（1. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China
2. Xinjiang Bayi Iron and Steel Limited Corporation， Baosteel Group， Urumqi 830000， Xinjiang， China
3. Marketing Representative Manager， China Iron and Steel Association， Beijing 100711， China
4. State Key Laboratory of Advanced Process and Steel Materials， Central Iron and Steel Institute， Beijing 100081， China） |
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Abstract Feasibility research of injection of blast furnace dust， which contains a large amount of iron and carbon， into melter gasifier of COREX was conducted to investigate an efficient utilization method. Chemical analysis， laser particle size analyzer and X-ray diffraction were used to investigate the chemical composition， particle size distribution， specific surface area and mineral composition of BF dust， including gravitational dust and bag dust， compared with the recycling dust of COREX. Thermogravimetric analysis was used to analyze combustion characteristics of samples under oxygen atmosphere， and the characteristic temperature， flammability index and comprehensive combustion characteristics index were calculated. Meanwhile， DAEM model was used to calculate the average activation energy of different samples. The results show that the chemical composition and particle size distribution of the bag dust are similar to those of the recycling dust of COREX， and the bag dust has better comprehensive combustion characteristics. The average activation energy of bag dust is 39.6kJ/mol， which is obviously lower than that of the recycling dust of COREX. The bag dust can be injected into melter gasifier of COREX， while it may decrease the combustion ratio of the dust to inject gravitational dust.
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Received: 16 November 2016
Published: 28 July 2017
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2017, Vol. 52 
