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<p>The effectiveness of blast furnace slag as a resource is heavily dependent on the size and sphericity of the slag from the dry centrifugal pelletizing process. The study employs numerical simulation to investigate how the slag flow rate, slag tube diameter, and rotor structure and speed affect the slag’s splitting patterns and particle shapes. This research aims to improve understanding of the pelletizing characteristics of centrifugal pelletizing technology. The results show that the critical splitting mode of slag offers a better pelletizing outcome than both filament and membrane splitting. In the critical mode, granulated droplets are produced with a particle size distribution from 0 to 1.2&#xa0;mm, an average sphericity of 67.39%, and particles are mostly smaller than 1&#xa0;mm. The shape of the slag particles is notably influenced by the rotor’s structure. Furthermore, drawing on the simulation outcomes, the study proposes dimensionless empirical methods to predict the average particle size across different splitting modes. These findings provide insights into the mean particle size distribution, which can guide the control of particle size in centrifugally granulated slag.</p> Graphical Abstract <p></p>

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Centrifugal Granulation Characteristics of Liquid Slag Under the Influence of Multiple Factors

  • 期刊论文

  • 发表日期：

    2025年1月17日

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  • Zhiyong Bai,
  • Ruibin Xue,
  • Shuzhong Wang,
  • Chengcheng Yang,
  • Qinyuan Wang,
  • Yuan Ma,
  • Ningwen Xu,
  • Fangshuo Shi,
  • Jun Zhao

摘要

The effectiveness of blast furnace slag as a resource is heavily dependent on the size and sphericity of the slag from the dry centrifugal pelletizing process. The study employs numerical simulation to investigate how the slag flow rate, slag tube diameter, and rotor structure and speed affect the slag’s splitting patterns and particle shapes. This research aims to improve understanding of the pelletizing characteristics of centrifugal pelletizing technology. The results show that the critical splitting mode of slag offers a better pelletizing outcome than both filament and membrane splitting. In the critical mode, granulated droplets are produced with a particle size distribution from 0 to 1.2 mm, an average sphericity of 67.39%, and particles are mostly smaller than 1 mm. The shape of the slag particles is notably influenced by the rotor’s structure. Furthermore, drawing on the simulation outcomes, the study proposes dimensionless empirical methods to predict the average particle size across different splitting modes. These findings provide insights into the mean particle size distribution, which can guide the control of particle size in centrifugally granulated slag.

Graphical Abstract