烧结机头烟灰资源化利用的研究进展

Progress in Resources Utilization of Sintering Dust

为促进资源的高效循环利用,将烧结烟灰作为二次资源,从中提取有价元素的研究备受关注。分析了近年来国内外在烧结烟灰上的研究成果,对烧结灰生产氯化钾、硫酸钾等钾盐产品以及回收其中的铁、锌、铅等有价元素的相关工艺路线进行了总结,并提出了通过水提钾、钠,再与铁矿混合还原焙烧,后经磁选提铁、酸碱浸出提锌、铅、银等有价金属的资源回收路线,为开发高效环保的烧结烟灰综合利用技术和提高钢铁行业固废的经济价值提供了理论基础。

The study on extracting available elements from the sintering dust as secondary resources has beenattracted much attention in recycled utilization of resources.We analyzed the recent research on sintering dustfrom home and abroad,and summarized the process routes for the production of potassium salt products such aspotassium chloride and potassium sulfate from sintered dust and the recovery of valuable elements such as iron,zinc and lead.We also proposed a resource recovery route for sintering dust,firstly extracting potassium andsodium with water and reduction roasting with iron ore,and then extracting iron by magnetic separationtechnology,finally extracting zinc,lead,silver and other valuable metals by acid and alkali leachingtechnology.This paper provides a theoretical basis for the development of efficient,environmentally friendlyand comprehensive utilization technology of sintering dust and improving the economic value of solid waste inthe steel industry.