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Effect of Binders on the Crushing Strength of Ferro-Coke

Ferro-coke, as a new burden of blast furnace (BF), can not only greatly reduce the energy consumption and CO(2) emission, but also promote the resource utilization by using the low-quality iron ore and low-grade coal. However, the strength of ferro-coke decreased with the increasing amount of iron o...

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Autores principales: Xu, Runsheng, Deng, Shuliang, Wang, Wei, Zheng, Heng, Chen, Shaopeng, Huang, Xiaoming, Wang, Fangfang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7916699/
https://www.ncbi.nlm.nih.gov/pubmed/33578898
http://dx.doi.org/10.3390/ma14040850
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author Xu, Runsheng
Deng, Shuliang
Wang, Wei
Zheng, Heng
Chen, Shaopeng
Huang, Xiaoming
Wang, Fangfang
author_facet Xu, Runsheng
Deng, Shuliang
Wang, Wei
Zheng, Heng
Chen, Shaopeng
Huang, Xiaoming
Wang, Fangfang
author_sort Xu, Runsheng
collection PubMed
description Ferro-coke, as a new burden of blast furnace (BF), can not only greatly reduce the energy consumption and CO(2) emission, but also promote the resource utilization by using the low-quality iron ore and low-grade coal. However, the strength of ferro-coke decreased with the increasing amount of iron ore powder. In order to maintain the strength of ferro-coke while increasing the amount of iron ore powder, it is necessary to add binder during the coking process to enhance the strength of ferro-coke. In this paper, phenolic resin, silicon metal powder, corn starch, and coal tar pitch were used as binder for the fabrication of ferro-coke. I-type drum machine (I 600), scanning electron microscope (SEM), and X-ray diffraction (XRD) were applied to test the crushing strength, morphology, and microcrystalline structure of the ferro-coke. The results showed that the increasing amount of iron ore powder resulted in lower crushing strength, higher porosity, and the worse macroscopic morphology of ferro-coke. When the amount of iron ore powder reached 40%, obvious cracks appeared on the surface of ferro-coke. When the amount of iron ore was 30%, the crushing strength of ferro-coke dropped to 18.15%. Among the four binders, coal tar pitch could significantly enhance the cold crushing strength of ferro-coke through decreasing the porosity of ferro-coke and improving the bonding effect between carbon matrix particles. In the case of the 10% coal tar pitch addition, the cold crushing strength of ferro-coke was increased from 18.15% to 76.41%; meanwhile, its hot compression strength during gasification improved by 100N.
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spelling pubmed-79166992021-03-01 Effect of Binders on the Crushing Strength of Ferro-Coke Xu, Runsheng Deng, Shuliang Wang, Wei Zheng, Heng Chen, Shaopeng Huang, Xiaoming Wang, Fangfang Materials (Basel) Article Ferro-coke, as a new burden of blast furnace (BF), can not only greatly reduce the energy consumption and CO(2) emission, but also promote the resource utilization by using the low-quality iron ore and low-grade coal. However, the strength of ferro-coke decreased with the increasing amount of iron ore powder. In order to maintain the strength of ferro-coke while increasing the amount of iron ore powder, it is necessary to add binder during the coking process to enhance the strength of ferro-coke. In this paper, phenolic resin, silicon metal powder, corn starch, and coal tar pitch were used as binder for the fabrication of ferro-coke. I-type drum machine (I 600), scanning electron microscope (SEM), and X-ray diffraction (XRD) were applied to test the crushing strength, morphology, and microcrystalline structure of the ferro-coke. The results showed that the increasing amount of iron ore powder resulted in lower crushing strength, higher porosity, and the worse macroscopic morphology of ferro-coke. When the amount of iron ore powder reached 40%, obvious cracks appeared on the surface of ferro-coke. When the amount of iron ore was 30%, the crushing strength of ferro-coke dropped to 18.15%. Among the four binders, coal tar pitch could significantly enhance the cold crushing strength of ferro-coke through decreasing the porosity of ferro-coke and improving the bonding effect between carbon matrix particles. In the case of the 10% coal tar pitch addition, the cold crushing strength of ferro-coke was increased from 18.15% to 76.41%; meanwhile, its hot compression strength during gasification improved by 100N. MDPI 2021-02-10 /pmc/articles/PMC7916699/ /pubmed/33578898 http://dx.doi.org/10.3390/ma14040850 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xu, Runsheng
Deng, Shuliang
Wang, Wei
Zheng, Heng
Chen, Shaopeng
Huang, Xiaoming
Wang, Fangfang
Effect of Binders on the Crushing Strength of Ferro-Coke
title Effect of Binders on the Crushing Strength of Ferro-Coke
title_full Effect of Binders on the Crushing Strength of Ferro-Coke
title_fullStr Effect of Binders on the Crushing Strength of Ferro-Coke
title_full_unstemmed Effect of Binders on the Crushing Strength of Ferro-Coke
title_short Effect of Binders on the Crushing Strength of Ferro-Coke
title_sort effect of binders on the crushing strength of ferro-coke
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7916699/
https://www.ncbi.nlm.nih.gov/pubmed/33578898
http://dx.doi.org/10.3390/ma14040850
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