The process of ＂re-resourcing of converter slag＂ was put forward based on the analysis of the existing steel slag treatment process.The converter slag obtained from Jinan steel plant was studied.After grinding,the s...The process of ＂re-resourcing of converter slag＂ was put forward based on the analysis of the existing steel slag treatment process.The converter slag obtained from Jinan steel plant was studied.After grinding,the slag contained 3.3% of iron particles,54.84% of magnetic part（wTFe=20%）,and 41.84% of non-magnetic part,which could be used for making cement directly.At a temperature below 1000 ℃,the non-magnetic Fe2O3 in the slag could be efficiently reduced to magnetic iron by pure H2 and CO.The slag after precise reduction had high degree of dispersion and did not get sintered,which provided an optimum condition for the separation of iron and impurities.To separate the slag and enrich the iron after reduction,the laboratory-scale device of magnetic separation was designed and made.The process of slag re-resourcing,which included magnetic sorting,precise reduction,magnetic separation,and removal of free calcium oxide（f-CaO）,was proposed to obtain iron-rich magnetic materials and cement adulterant materials.Through this process,33 kg iron particles,150 kg iron-rich material and 700 kg cement could be obtained in each ton slag.Besides,this process to recycle converter slag had a lower energy and material consumption and no pollutant emission.展开更多
In May 2025,the 78 th World Health Assembly adopted a global roadmap to address the health effects of air pollution.Within this framework,the World Health Organization(WHO)proposed an ambitious target of reducing mort...In May 2025,the 78 th World Health Assembly adopted a global roadmap to address the health effects of air pollution.Within this framework,the World Health Organization(WHO)proposed an ambitious target of reducing mortality from anthropogenic air pollution by 50% by 2040 relative to 2015.This sets a significantly higher benchmark for global air quality actions.展开更多
基金Item Sponsored by National Science and Technology Support Program of China(2006BAE03A10)
文摘The process of ＂re-resourcing of converter slag＂ was put forward based on the analysis of the existing steel slag treatment process.The converter slag obtained from Jinan steel plant was studied.After grinding,the slag contained 3.3% of iron particles,54.84% of magnetic part（wTFe=20%）,and 41.84% of non-magnetic part,which could be used for making cement directly.At a temperature below 1000 ℃,the non-magnetic Fe2O3 in the slag could be efficiently reduced to magnetic iron by pure H2 and CO.The slag after precise reduction had high degree of dispersion and did not get sintered,which provided an optimum condition for the separation of iron and impurities.To separate the slag and enrich the iron after reduction,the laboratory-scale device of magnetic separation was designed and made.The process of slag re-resourcing,which included magnetic sorting,precise reduction,magnetic separation,and removal of free calcium oxide（f-CaO）,was proposed to obtain iron-rich magnetic materials and cement adulterant materials.Through this process,33 kg iron particles,150 kg iron-rich material and 700 kg cement could be obtained in each ton slag.Besides,this process to recycle converter slag had a lower energy and material consumption and no pollutant emission.
基金funded by the National Natural Science Foundation of China(42307550 and 82425051)the Energy Foundation(G-2407-35711).
文摘In May 2025,the 78 th World Health Assembly adopted a global roadmap to address the health effects of air pollution.Within this framework,the World Health Organization(WHO)proposed an ambitious target of reducing mortality from anthropogenic air pollution by 50% by 2040 relative to 2015.This sets a significantly higher benchmark for global air quality actions.
