Numerical Modeling for Simulation of Compaction of Refractory Materials for Secondary Steelmaking.

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ID: 84518
2020
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Abstract
The purpose of this work is to simulate the powder compaction of refractory materials, using the discrete element method (DEM). The capability of two cohesive contact models, implemented in different DEM packages, to simulate the compaction of a mixture of two refractory materials (dead burnt magnesia (MgO) and calcined alumina (AlO)) was analyzed, and the simulation results were compared with experimental data. The maximum force applied by the punch and the porosity and final shape quality of the compact were examined. As a starting point, the influence of Young's modulus (E), the cohesion energy density (CED), and the diameter of the AlO particles (D) on the results was analyzed. This analysis allowed to distinguish that E and CED were the most influential factors. Therefore, a more extensive examination of these two factors was performed afterward, using a fixed value of D. The analysis of the combined effect of these factors made it possible to calibrate the DEM models, and consequently, after this calibration, the compacts had an adequate final shape quality and the maximum force applied in the simulations matched with the experimental one. However, the porosity of the simulated compacts was higher than that of the real ones. To reduce the porosity of the compacts, lower values of D were also modeled. Consequently, the relative deviation of the porosity was reduced from 40-50% to 20%, using a value of D equal to 0.15 mm.
Reference Key
ramrezaragn2020numericalmaterials Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Ramírez-Aragón, Cristina;Ordieres-Meré, Joaquín;Alba-Elías, Fernando;González-Marcos, Ana;
Journal Materials (Basel, Switzerland)
Year 2020
DOI
E224
URL
Keywords
experiments cohesive contact models discrete element method (dem) powder compaction refractory materials cell cycle gastric cancer cdk4/cyclind1 hp-caga+ reg3

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