کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8072635 1521409 2017 30 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study on the formation of direct reduced iron by using biomass as reductants of carbon containing pellets in RHF process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Study on the formation of direct reduced iron by using biomass as reductants of carbon containing pellets in RHF process
چکیده انگلیسی
To investigate the possibility of using biomass reductants instead of fossil fuels in the formation of direct reduced iron (DRI) in rotary hearth furnace (RHF), three kinds of cheap biomass such as bamboo char, straw fiber and charcoal were selected as reductants to compare with anthracite and graphite. The effect of reductants, temperature, dwelling time, C/O ratio and particle sizes on the shrinkage, strength and metallization of the biomass/ore pellets was investigated and discussed. The optimized reduction conditions were obtained as 1200 °C, 20min, C/O = 0.7 and the particle size range of <0.15 mm, 1-2 mm and 0.15-0.3 mm for straw fiber, bamboo char and charcoal respectively. The results showed that straw fiber was considered as an optimal reductant in the formation of direct reduced iron instead of fossil fuels. By the techniques of scanning electron microscope (SEM), thermogravimetric analysis (TGA), and X-ray diffraction (XRD), the mechanism of biomass as reductants was revealed. Volatile matter was confirmed to play an important role in the formation of DRI when biomass used as reductants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 141, 15 December 2017, Pages 472-482
نویسندگان
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