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| New smelting-separation process based on hot air-coal combustion dealing with metallurgical solid wastes |
| ZHANG Jun，DAI Xiao-tian，YAN Ding-liu |
| State Key Laboratory of Advanced Steel Processes and Products，Central Iron and Steel Research Institute，Beijing 100081，China |
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Abstract In order to make better use of metallurgical solid wastes， the smelting-separation process based on coal combustion was explored to deal with iron-bearing materials with a large amount of slag. The results of heat-balance calculation revealed the advantage of hot air-coal combustion process， based on which a new smelting-separation process was proposed and studied through experiments to discuss its feasibility. The iron yield increased with the fixed carbon content in pellets， which exceeded 94% when the combustion ratio of oxygen to carbon was lower than 1.0. Compared to the traditional injection process of pulverized coal， higher melting efficiency of pellets is insured in reducing atmosphere in the new smelting-separation process， which has an advantage to deal with metallurgical solid wastes with a large amount of slag.
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Received: 11 November 2015
Published: 26 July 2016
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2016, Vol. 51 
