Recycling of iron-rich basic oxygen furnace dust using hydrogen-based direct reduction

被引：3
|
作者：
Kovtun, Oleksandr [1 ]
Levchenko, Mykyta [1 ]
Ho, Stephan
Lohmeier, Laura [2 ]
Schreiner, Marcus [3 ]
Gra, Martin
Volkova, Olena [1 ]
机构：
[1] TU Bergakad Freiberg, Inst Iron & Steel Technol IEST, Leipziger Str 34, D-09599 Freiberg, Germany
[2] TU Bergakad Freiberg, Inst Thermal Environm & Resources Proc Engn ITUN, Leipziger Str 28, D-09599 Freiberg, Germany
[3] TU Bergakad Freiberg, Inst Energy Proc Engn & Chem Engn, Fuchsmuhlenweg 9 D, D-09599 Freiberg, Germany
来源：
RESOURCES CONSERVATION & RECYCLING ADVANCES | 2024年 / 23卷
关键词：
Recycling; Metallurgical dust; BOF; Hydrogen; Direct reduction; Phosphorus; SWELLING BEHAVIOR; ORE; PELLETS;
D O I：
10.1016/j.rcradv.2024.200225
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The reduction of iron oxide-bearing ores necessitates the exploration of alternatives. Recycling iron oxideenriched metallurgical dust could serve as secondary raw material for metallurgical processes. Implementing environmentally friendly technologies utilizing hydrogen has prompted the concept of hydrogen reduction of metallurgical dust to recycle secondary steel production products. The present study investigates the characteristics of hydrogen reduction of briquettes and pellets produced from basic oxygen furnace dust and reduced at the temperature of 850 degrees C. Experimental results revealed that the reduction degree for pellets was approximately 1.5 times higher compared to briquettes. The reduction swelling index of pellets was noticeable lower compared to literature data of reduction swelling index for iron ore pellets. Scanning electron microscopy/energydispersive X-ray spectroscopy was carried out to detect changes in the microstructure and chemical composition of the samples. Subsequent melting of the reduced samples unveiled non-metallic inclusions within the iron alloy and the impact of slag on their distribution between the alloy and slag.
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页数：10
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