摘要
简述了钢铁冶金尘泥现有的处理工艺,具体介绍了回转窑工艺、Oxycup工艺、转底炉工艺.钢铁冶金尘泥目前的处理工艺主要停留在尘泥资源化回收利用的前3个阶段,往往只针对含量较高的部分元素进行分离回收.钢铁产业集聚区的尘泥除了含有Fe、Zn、Pb、K、Na等元素,还富集了大量In、Bi、Sn、Cd等具有高附加值的稀散元素,是宝贵的有价资源.随着国家环保法规和产业政策的要求,钢铁冶金尘泥已经到了必须100%全部回收利用的新阶段.鉴于此,提出了根据各自的成分特征进行基于产品设计的各种尘泥间的协同搭配、单元技术间的科学耦合和系统集成,实现多组分梯级分离和全量利用的技术方案,希望能够为钢铁企业冶金尘泥的全量资源化利用提供参考.
Iron and steel metallurgical dust is a solid waste produced in the production process of the iron and steel industry.It has the characteristics of many types,large quantities,complex components,and many valuable elements.Japan and Germany have realized the centralized treatment and comprehensive utilization of metallurgical solid wastes,and China’s current technological level is still far behind them.This paper briefly described the existing treatment processes of iron and steel metallurgical dust and mud and specifically introduced the most widely used pyrotechnic processes in enterprises,including the rotary kiln,Oxycup,and rotary hearth furnace processes.The current treatment process of iron and steel metallurgical dust and sludge mainly stays in the first three stages of dust and sludge resource recycling and often only separates and recovers some elements with high contents.In addition to elements such as Fe,Zn,Pb,K,and Na,dust and mud in an iron and steel industry agglomeration area are also enriched with large amounts of valuable and rare elements with high added values such as In,Bi,Sn,and Cd,which are precious materials.The ineffective treatment and recycling of a huge volume of iron and steel metallurgical dust and mud will cause serious air,water,and soil pollutions;affect the ecological environment;and endanger human life.Moreover,it will cause a considerable loss of valuable resources,which is not conducive to the rapid development of China’s industries.With the requirements of the national environmental protection regulations and industrial policies,steel metallurgical dust and sludge have reached a new stage where 100%of all dust and sludge must be recycled.In response to this,a technical solution established on the product design based on the coordination of various types of dust and mud,scientific coupling,and system integration among unit technologies was proposed according to their respective composition characteristics to achieve multicomponent cascade separation and full utilization.The full resource utilization of metallurgical dust and sludge in iron and steel enterprises provides a reference.
作者
王静松
李岩
冯怀萱
薛庆国
佘雪峰
王广
左海滨
WANG Jing-song;LI Yan;FENG Huai-xuan;XUE Qing-guo;SHE Xue-feng;WANG Guang;ZUO Hai-bin(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China)
出处
《工程科学学报》
EI
CSCD
北大核心
2021年第12期1737-1749,共13页
Chinese Journal of Engineering
基金
国家重点研发计划专项基金资助项目(2019YFC1905705)
广东省省级科技计划资助项目(GDKJ2020002)。
关键词
钢铁产业集聚区
钢铁冶金尘泥
全量资源化利用
稀散元素
联合工艺
iron and steel industry agglomeration area
iron and steel metallurgical dust and sludge
full-scale resource utilization
rarefied elements
combined process
