Properties of steelmaking dusts from dry dust separators

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Abstract

During the production of plain carbon steel from hot metal and/or scrap considerable amounts of dust-laden off-gases are produced. In de-dusting of these off-gases considerable amounts of fine grained residues are produced, which have to be stored, transported and handled. Thereby, the flow-related properties of the dusts are of great importance. In this study the mechanical properties of dusts from dry off-gas de-dusting in steelmaking plants were investigated. The mass median diameters of electric arc furnace (EAF) dust, basic oxygen furnace (BOF) primary de-dusting dust and vacuum degassing dust (VD) were in the range of a few micrometer, while it was up to more than 100 μm for the residues from the pre-separators in EAF and BOF de-dusting. The values for the particle density were quite similar for all dusts (approximately 3,800-4,800 kg/m 3 ), but the bulk density of the dusts varied in a wide range (approximately 190-1,900 kg/m 3 ). With respect to the flow relevant parameters - flowability, angle of internal friction, wall friction angle and angle of repose - the investigated dusts can be split into two groups: the coarse residues from the pre-separators, which are characterized by low values for the angles and a good flowability, and all other dusts with higher values for the angles and a flowability in the range of very cohesive to cohesive.

Original languageEnglish
Title of host publicationMETAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings
PublisherTANGER Ltd.
Pages41-48
Number of pages8
ISBN (Electronic)9788087294840
Publication statusPublished - 2018
Event27th International Conference on Metallurgy and Materials, METAL 2018 - Brno, Czech Republic
Duration: 23 May 201825 May 2018

Publication series

NameMETAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings

Conference

Conference27th International Conference on Metallurgy and Materials, METAL 2018
Country/TerritoryCzech Republic
CityBrno
Period23.05.201825.05.2018

Keywords

  • BOF dust
  • Dust flowability
  • Dust properties
  • EAF dust
  • Steelmaking dust

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