Studying effects of pelletizing process parameters on the main properties of iron ore green pellets-laboratory approach

Document Type : Original Article

Authors
1 Department of Mechanical Engineering, Technical and Vocational University
2 Department of Mechanical Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran.
3 Iran
4 iran
Abstract
In the present research, effect of pelletizing disk angle and rotation speed, as well as the percentage of moisture and bentonite on the median size (pellets size distrinution index) and the mean drop number (pellets strength index) are studied experimentally. Design of experiment approach is applied  leading to obtain reasonable number of experimens with specific settings.  To achive parametric  mathematical functions, curve fitting is performed on the experimental results and four-variable functions were developed for the two characteristics of median size and drop number. In order to reveal the details and the role of each factor on the results, the necessary contour graphs are prepared.  Based on the observed influences of each parameter on the pellets characteristics, the probable reasons and their physical interpretation were discussed. It was found that there are soptimal settings for the two factors of rotation speed and disc inclination, leading to obtaine the desired pellet from both the size and strength perspectives. In addition, it was found that in the studied range, the moisture and bentonite do not necessarily have a positive effect on both pellets size and strength concurrently. The results of the present research can be usefull for pellet production plants as assist to arrive optimall settings of the production process.
Keywords
Subjects

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Volume 2, Issue 2 - Serial Number 3
February 2023
Pages 7-19

  • Receive Date 08 January 2024
  • Revise Date 29 May 2024
  • Accept Date 09 February 2024
  • First Publish Date 09 February 2024
  • Publish Date 21 January 2024