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Study on Reduction of Blast Furnace Flue Dust Briquette Made with Fly Ash as Binder
https://orcid.org/http://orcid.org/0000-0002-5631-2906
Integrated steel plants and mini steel plants produce lots of iron-bearing waste materials in the form of fines and ultrafines. Thermal power plants also produce huge amount of fly ash, which is used in chemical industries, construction material and landfilling. The small amount of iron-bearing industry wastes is used for sintering and pelletizing. In this present research work, composite briquettes have been produced using laboratory-grade Fe2O3 fines (purity ≥ 98%, ≤ 75 µm), blast furnace flue dust (≤ 75 µm), fly ash (≤ 75 µm) and pure graphite (≥ 99%, ≤ 150 µm), where fly ash has been used as a binder and studied the effect of flue dust concentration on the reduction behaviour of the developed composite briquettes at different temperature namely 1073 K, 1173 K, 1273 K, 1373 K and 1473 K under nitrogen atmosphere for 2 h. It is found that the reducibility of the cold composite briquette with a definite amount of blast furnace flue dust increases with temperature and time in the temperature ranges of 1073–1473 K, and the modified unimolecular reaction kinetic model has described the reduction mechanism of the cylindrical briquettes. In addition to that, the activation energy for the reduction increases with increased amount of blast furnace flue dust in the sample.
Study on Reduction of Blast Furnace Flue Dust Briquette Made with Fly Ash as Binder
https://orcid.org/http://orcid.org/0000-0002-5631-2906
Integrated steel plants and mini steel plants produce lots of iron-bearing waste materials in the form of fines and ultrafines. Thermal power plants also produce huge amount of fly ash, which is used in chemical industries, construction material and landfilling. The small amount of iron-bearing industry wastes is used for sintering and pelletizing. In this present research work, composite briquettes have been produced using laboratory-grade Fe2O3 fines (purity ≥ 98%, ≤ 75 µm), blast furnace flue dust (≤ 75 µm), fly ash (≤ 75 µm) and pure graphite (≥ 99%, ≤ 150 µm), where fly ash has been used as a binder and studied the effect of flue dust concentration on the reduction behaviour of the developed composite briquettes at different temperature namely 1073 K, 1173 K, 1273 K, 1373 K and 1473 K under nitrogen atmosphere for 2 h. It is found that the reducibility of the cold composite briquette with a definite amount of blast furnace flue dust increases with temperature and time in the temperature ranges of 1073–1473 K, and the modified unimolecular reaction kinetic model has described the reduction mechanism of the cylindrical briquettes. In addition to that, the activation energy for the reduction increases with increased amount of blast furnace flue dust in the sample.
Study on Reduction of Blast Furnace Flue Dust Briquette Made with Fly Ash as Binder
https://orcid.org/http://orcid.org/0000-0002-5631-2906
Integrated steel plants and mini steel plants produce lots of iron-bearing waste materials in the form of fines and ultrafines. Thermal power plants also produce huge amount of fly ash, which is used in chemical industries, construction material and landfilling. The small amount of iron-bearing industry wastes is used for sintering and pelletizing. In this present research work, composite briquettes have been produced using laboratory-grade Fe2O3 fines (purity ≥ 98%, ≤ 75 µm), blast furnace flue dust (≤ 75 µm), fly ash (≤ 75 µm) and pure graphite (≥ 99%, ≤ 150 µm), where fly ash has been used as a binder and studied the effect of flue dust concentration on the reduction behaviour of the developed composite briquettes at different temperature namely 1073 K, 1173 K, 1273 K, 1373 K and 1473 K under nitrogen atmosphere for 2 h. It is found that the reducibility of the cold composite briquette with a definite amount of blast furnace flue dust increases with temperature and time in the temperature ranges of 1073–1473 K, and the modified unimolecular reaction kinetic model has described the reduction mechanism of the cylindrical briquettes. In addition to that, the activation energy for the reduction increases with increased amount of blast furnace flue dust in the sample.
Study on Reduction of Blast Furnace Flue Dust Briquette Made with Fly Ash as Binder
J. Inst. Eng. India Ser. D
Das, Ritwik (Autor:in) / Mondal, Manas Kumar (Autor:in) / Pramanik, Susanta (Autor:in)
Journal of The Institution of Engineers (India): Series D ; 102 ; 173-183
01.06.2021
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Hydraulic binder composition comprising blast furnace slag
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