Volume 44
您当前的位置:首页 > 期刊文章 > 过刊浏览 > Volumes 42-47 (2019) > Volume 44
Kou, M., Xu, J., Wu, S., Zhou, H., Gu, K., Yao, S., & Wen, B. (2019). Effect of cross-section shape of rotating chute on particle movement and distribution at the throat of a bell-less top blast furnace. Particuology, 44, 194-206. https://doi.org/10.1016/j.partic.2018.07.010
Effect of cross-section shape of rotating chute on particle movement and distribution at the throat of a bell-less top blast furnace
Mingyin Kou a *, Jian Xu b *, Shengli Wu a, Heng Zhou a, Kai Gu a, Shun Yao a, Bingjie Wen a
a School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
b Department of Metallurgical Engineering, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
10.1016/j.partic.2018.07.010
Volume 44, June 2019, Pages 194-206
Received 26 October 2017, Revised 20 November 2017, Accepted 20 July 2018, Available online 23 January 2019, Version of Record 30 April 2019.
E-mail: koumingyin@ustb.edu.cn; jxu@cqu.edu.cn

Highlights

• Main striking point increases when chute angle or rotating speed increases.

• Chute angle affects the radial burden distribution more than rotating speed.

• Semicircular chutes are beneficial for obtaining uniform burden size distribution.

• Rectangular chutes help form a more aggregated burden stream.

• Particles discharged from semicircular and trapezoidal chutes have more rotation.


Abstract

Rotating chutes are widely used to control the burden distribution and enhance the gas distribution in a blast furnace. The chute cross-section shape has a significant effect on the particle movement and distribution. Therefore, this study developed a three-dimensional model of a blast furnace top with rotating chute using the discrete element method. The effect of different chute shapes on the particle movement and radial burden distribution was then investigated. The results showed that the burden stream height at the chute discharge agrees well with the burden stream thickness at the burden surface. A semicircular chute had the largest main striking point, where the chute discharge joins the burden surface, and trapezoidal and rectangular chutes had successively smaller MSPs. The semicircular chute helped to obtain a uniform radial size distribution. The trapezoidal chute helped form an aggregated burden stream at low rotating speeds, while the rectangular shape chute achieved this at higher rotating speeds and different chute angles.

Graphical abstract
Keywords
Blast furnace; Chute shape; Burden size segregation; Discrete element method