Solid State Material Driven Turbine to Reduce Segregation during Bunker Filling

Research output: Contribution to journalArticleResearchpeer-review


For most applications and their following processes, an evenly distributed bunker outflow is desired in terms of particle size. Various discrete element simulations were performed to analyze the current state of an existing
bunker used for storage of blast furnace sinter, whichis simply filled with a discharging belt conveyor. Great segregation effects could be determined, which are mainly caused by the fillingmethod and further intensified by the core flow
effect and bunker geometry. Several concepts and devices to reduce segregation in bunkers were evaluated using DEM. The particle size distributions
at the bunker outflow were each compared with the current state without a device. A solid state material driven turbine is presented, which reduces segregation effects during bunker filling and leads to a significant improvement
during the discharge. The results show a more evenly distributed bunker outflow in terms of particle size. As sinter is a very abrasivematerial, thewear at the turbine has also been evaluated. Furthermore, the power output in this case and the potential of energy recovery were investigated, which could be of interest in many other applications. Additionally, the particle degradation at the solid state material driven turbine is evaluated in this case. A newly developed
breakage model for DEM is used. The model is based on the particle replacement method, combined with the voronoi tessellation algorithm and breakage probabilities to achieve a high accuracy in terms of fragment size
Original languageEnglish
Pages (from-to)62-70
Number of pages9
JournalBerg- und hüttenmännische Monatshefte : BHM
Issue number2
Publication statusPublished - 13 Jan 2023


  • Size segregation
  • Particle size distribution
  • Energy recovery
  • Particle breakage
  • Discrete element method
  • Blast furnace sinter
  • Cross flow turbine

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