Effect of organic binders in the activation and properties of indurated magnetite pellets

Cui Wang; Chen-yang Xu; Zheng-jian Liu; Yao-zu Wang; Rong-rong Wang; Li-ming Ma

doi:10.1007/s12613-020-2055-7

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Effect of organic binders in the activation and properties of indurated magnetite pellets

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Received: 16 January 2020; Revised: 30 March 2020; Accepted: 1 April 2020; Available online: 3 April 2020

Abstract

In the ironmaking process, adding organic binder replaces a portion of bentonite is a potential solution to improve the performance of the pellets. The interaction between the original bentonite (OB) and the organic binder was investigated. The results illustrate that the micro-morphology of the organic composite bentonite (OCB) became porous and the infrared difference spectrum was a curve. Additionally, the residual burning rates of OB and organic binder were measured, which were 82.72% and 2.30%, respectively. Finally, the influence of OCB on the properties of pellets were studied. The compressive strength of OCB-added green pellets (14.7 N/pellet) was better than that of OB-added pellets (10.3 N/pellet), and the range of melting temperature (173℃) was narrower than that of OB-added pellets (198℃). The compressive strength of OCB-added pellets increased from 2156 N/pellet to 3156 N/pellet with the roasting temperature increased from 1200℃ to 1250℃.

References

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沈阳化工大学材料科学与工程学院沈阳 110142

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Effect of organic binders in the activation and properties of indurated magnetite pellets

Corresponding author:

Zheng-jian Liu E-mail: liuzhengjian@ustb.edu.cn

1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing,0th Xueyuan Road, Haidian District, Beijing 100083, China

2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30th Xueyuan Road, Haidian District, Beijing 100083, China

3. Department of Ferrous Metallurgy, RWTH Aachen University, Intzestraße 1, 52072 Aachen, Germany

Received: 16 January 2020
Revised: 30 March 2020
Accepted: 1 April 2020
Available online: 3 April 2020

Abstract: In the ironmaking process, adding organic binder replaces a portion of bentonite is a potential solution to improve the performance of the pellets. The interaction between the original bentonite (OB) and the organic binder was investigated. The results illustrate that the micro-morphology of the organic composite bentonite (OCB) became porous and the infrared difference spectrum was a curve. Additionally, the residual burning rates of OB and organic binder were measured, which were 82.72% and 2.30%, respectively. Finally, the influence of OCB on the properties of pellets were studied. The compressive strength of OCB-added green pellets (14.7 N/pellet) was better than that of OB-added pellets (10.3 N/pellet), and the range of melting temperature (173℃) was narrower than that of OB-added pellets (198℃). The compressive strength of OCB-added pellets increased from 2156 N/pellet to 3156 N/pellet with the roasting temperature increased from 1200℃ to 1250℃.

Effect of organic binders in the activation and properties of indurated magnetite pellets

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通讯作者: 陈斌, bchen63@163.com

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