Investigation on the granulation behavior of iron ore fine in a horizontal high-shear granulator--颗粒学报PARTICUOLOGY

You, Y., Guo, J., Li, G., Zheng, Z., Li, Y., Yu, Y., & Lv, X. (2022). Investigation on the granulation behavior of iron ore fine in a horizontal high-shear granulator. Particuology, 68, 57-64. https://doi.org/10.1016/j.partic.2021.11.004

Investigation on the granulation behavior of iron ore fine in a horizontal high-shear granulator

Yang You ^{a b *}, Jiabao Guo ^{a b}, Gang Li ^{a b}, Zhuang Zheng ^{a b}, Yong Li ^{a b d}, Yaowei Yu ^c, Xuewei Lv ^{a b *}

a College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
b Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing 400044, China
c State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
d State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China

10.1016/j.partic.2021.11.004

Volume 68, September 2022, Pages 57-64

Received 8 September 2021, Revised 12 November 2021, Accepted 13 November 2021, Available online 20 November 2021, Version of Record 2 December 2021.

E-mail: youyang@cqu.edu.cn; lvxuewei@cqu.edu.cn

Highlights

• A horizontal high-shear granulator was used for iron ore fine granulation.

• Granulation performance at different shear conditions was analyzed.

• Growth of granules can be divided into three stages in granulation process.

Abstract

High-shear granulation is widely used in many particulate industries for its good capability to improve the size, strength and composition uniformity of powder substances. This work conducted an experimental study to investigate the granulation behavior of iron ore fine in a horizontal high-shear granulator, such as granules size distribution, granules growth rate, and permeability of the granules bed. The results show that the granule size and permeability of packed granules bed increase gradually with increasing the granulation time, and the growth of granules can be divided into three stages: the rapid growth stage, the slow growth stage and the relatively stable stage. Both the higher rotational speed and larger number of impellers increase the kinetic energy and collision frequency of the particles, which causes the increase of average granule size, growth rate and permeability of granules packed bed. On the other hand, the shear damage effect of the impellers on the granules is also enhanced with the increase of rotational speed and impeller number, resulting in significant granule size segregation.

Graphical abstract

Keywords

High shear granulation; Iron ore; Particle; Size distribution

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