为了更好地利用冶金含铁固废，探索了适合处理大渣量含铁原料的煤粉燃烧熔分工艺。热平衡计算显示，理论上热风-热煤燃烧工艺具有优势，以此为依据，提出了基于热风-热煤燃烧的熔分新工艺，并在实验室条件下探讨了该工艺的可行性。结果表明，当燃烧氧碳比低于1.0时，铁的收得率高于94%，且球团中固定碳质量分数越高时铁的收得率越高；对比传统喷煤燃烧熔分工艺，热风-热煤燃烧熔分工艺在保证还原性气氛的同时，提高了球团的熔化效率，在处理大渣量含铁冶金固废方面具有优势。
In order to make better use of metallurgical solid wastes,the smelting-separation process based on coal combus-tion was explored to deal with iron-bearing materials with a large amount of slag. The results of heat-balance calculation re-vealed 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 injec-tion 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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