热风-热煤燃烧熔分新工艺处理冶金固废  

New smelting-separation process based on hot air-coal combustion dealing with metallurgical solid wastes

作　　者：张俊[1] 戴晓天[1] 严定鎏[1] 

机构地区：[1]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081

出　　处：《钢铁》2016年第8期76-80,共5页Iron and Steel

基　　金：国家自然科学基金资助项目(51404075)

摘　　要：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 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 smeltingseparation process,which has an advantage to deal with metallurgical solid wastes with a large amount of slag.

关 键 词：大渣量 冶金固废 熔分 热风-热煤燃烧 

分 类 号：X756[环境科学与工程—环境工程]