Characteristics and sintering mechanisms of iron ores with a high proportion of high-Al2O3 limonite

In this study, a sintering test of high-alumina limonite from Indonesia, matched with an appropriate magnetite concentration, is performed. The sintering yield and quality index are effectively improved by optimizing the ore matching and regulating the basicity. For the optimal coke dosage of 5.8% a...

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Main Authors: Liang, Zhikai, Chen, Jun, Huang, Zhucheng, Huang, Boyang
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/169880
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1698802023-08-12T16:48:04Z Characteristics and sintering mechanisms of iron ores with a high proportion of high-Al2O3 limonite Liang, Zhikai Chen, Jun Huang, Zhucheng Huang, Boyang School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Engineering::Mechanical engineering Calcium Alumina In this study, a sintering test of high-alumina limonite from Indonesia, matched with an appropriate magnetite concentration, is performed. The sintering yield and quality index are effectively improved by optimizing the ore matching and regulating the basicity. For the optimal coke dosage of 5.8% and basicity of 1.8, the tumbling index of the ore blend is found to be 61.5% and the productivity is 1.2 t/(h·m2). The main liquid phase in the sinter is the silico-ferrite of calcium and aluminum (SFCA), followed by a mutual solution, both of which maintain the sintering strength. However, when the basicity is increased from 1.8 to 2.0, the production of SFCA is found to increase gradually, whereas the mutual solution content decreases dramatically. A metallurgical performance test of the optimal sinter sample demonstrates that the sinter can meet the requirements of small- and medium-sized blast furnace smelting, even for high-alumina limonite ratios of 60.0-65.0%, thereby greatly reducing the sintering production costs. The results of this study are expected to provide theoretical guidance for the practical high-proportion sintering of high-alumina limonite. Published version The authors would like to express thanks to the Natural Science Foundation of China (Grant No. 51504230), the Basic Research on the Application of the Cultivation Plan of Scientific and Ttechnological Innovation Ability of Chenzhou Bureau of Science and Technology (Grant No. 2021JCYJ02), the Scientific Research Project of Hunan Provincial Department of Education (Grant No. 20C1724), and the Innovation Training Program for College Students in Hunan Province (Grant No. 202210545005) for financial support of this research. 2023-08-11T03:27:48Z 2023-08-11T03:27:48Z 2023 Journal Article Liang, Z., Chen, J., Huang, Z. & Huang, B. (2023). Characteristics and sintering mechanisms of iron ores with a high proportion of high-Al2O3 limonite. ACS Omega, 8(18), 15951-15959. https://dx.doi.org/10.1021/acsomega.2c07659 2470-1343 https://hdl.handle.net/10356/169880 10.1021/acsomega.2c07659 37179632 2-s2.0-85156205124 18 8 15951 15959 en ACS Omega © 2023 The Authors. Published by American Chemical Society. This is an open-access article distributed under the terms of the Creative Commons Attribution License. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
Calcium
Alumina
spellingShingle Engineering::Mechanical engineering
Calcium
Alumina
Liang, Zhikai
Chen, Jun
Huang, Zhucheng
Huang, Boyang
Characteristics and sintering mechanisms of iron ores with a high proportion of high-Al2O3 limonite
description In this study, a sintering test of high-alumina limonite from Indonesia, matched with an appropriate magnetite concentration, is performed. The sintering yield and quality index are effectively improved by optimizing the ore matching and regulating the basicity. For the optimal coke dosage of 5.8% and basicity of 1.8, the tumbling index of the ore blend is found to be 61.5% and the productivity is 1.2 t/(h·m2). The main liquid phase in the sinter is the silico-ferrite of calcium and aluminum (SFCA), followed by a mutual solution, both of which maintain the sintering strength. However, when the basicity is increased from 1.8 to 2.0, the production of SFCA is found to increase gradually, whereas the mutual solution content decreases dramatically. A metallurgical performance test of the optimal sinter sample demonstrates that the sinter can meet the requirements of small- and medium-sized blast furnace smelting, even for high-alumina limonite ratios of 60.0-65.0%, thereby greatly reducing the sintering production costs. The results of this study are expected to provide theoretical guidance for the practical high-proportion sintering of high-alumina limonite.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Liang, Zhikai
Chen, Jun
Huang, Zhucheng
Huang, Boyang
format Article
author Liang, Zhikai
Chen, Jun
Huang, Zhucheng
Huang, Boyang
author_sort Liang, Zhikai
title Characteristics and sintering mechanisms of iron ores with a high proportion of high-Al2O3 limonite
title_short Characteristics and sintering mechanisms of iron ores with a high proportion of high-Al2O3 limonite
title_full Characteristics and sintering mechanisms of iron ores with a high proportion of high-Al2O3 limonite
title_fullStr Characteristics and sintering mechanisms of iron ores with a high proportion of high-Al2O3 limonite
title_full_unstemmed Characteristics and sintering mechanisms of iron ores with a high proportion of high-Al2O3 limonite
title_sort characteristics and sintering mechanisms of iron ores with a high proportion of high-al2o3 limonite
publishDate 2023
url https://hdl.handle.net/10356/169880
_version_ 1779156557414531072