A Review on the Humic Substances in Pelletizing Binders: Preparation, Interaction Mechanism, and Process Characteristics

HongXing Zhao; FengShan Zhou; XinCheng Bao; SiHan Zhou; ZhongJing Wei; Wen Jun Long; Zhou Yi

doi:10.2355/isijinternational.ISIJINT-2022-306

Review Article

A Review on the Humic Substances in Pelletizing Binders: Preparation, Interaction Mechanism, and Process Characteristics

HongXing Zhao, FengShan Zhou , XinCheng Bao, SiHan Zhou, ZhongJing Wei, Wen Jun Long, Zhou Yi

Author information

HongXing Zhao
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing) [China]
FengShan Zhou Corresponding author
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing) [China]
XinCheng Bao
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing) [China]
SiHan Zhou
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing) [China]
ZhongJing Wei
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing) [China]
Wen Jun Long
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing) [China]
Zhou Yi
School of Materials Science and Engineering, Taiyuan University of Science and Technology [China]

Keywords: humic acid binder, adsorption mechanism, green pellet drop number, dry pellet compressive strength, fired pellet compressive strength

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2023 Volume 63 Issue 2 Pages 205-215

DOI https://doi.org/10.2355/isijinternational.ISIJINT-2022-306

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Abstract

Humic acid is inexpensive, and has a wide range of sources and a strong adsorption force with the surface of iron ore, and the size of its adsorption force is affected by some factors such as humic acid concentration, pH of the solution, and metal cations. The modified humic acid pellet binder (MHA) with strong adhesion and high viscosity was obtained through the separation and purification of solid wastes such as lignite and weathered coal and chemical modification treatment and successfully applied in the production process of iron ore pellets. After industrial tests, MHA can significantly improve the strength of green and dry pellets, less residue after high-temperature roasting, less metallurgical pollution, high strength of fired pellets, and can partially or completely replace bentonite.

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