TY - GEN
T1 - Properties of steelmaking dusts from dry dust separators
AU - Lanzerstorfer, Christof
N1 - Publisher Copyright:
© 2018 TANGER Ltd., Ostrava.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
KW - BOF dust
KW - Dust flowability
KW - Dust properties
KW - EAF dust
KW - Steelmaking dust
UR - http://www.scopus.com/inward/record.url?scp=85059414376&partnerID=8YFLogxK
M3 - Conference contribution
T3 - METAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings
SP - 41
EP - 48
BT - METAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings
PB - TANGER Ltd.
T2 - 27th International Conference on Metallurgy and Materials, METAL 2018
Y2 - 23 May 2018 through 25 May 2018
ER -