Mathematical Model of Solid Flow Behavior in a Real Dimension Blast Furnace
2013 (English)In: ISIJ International, ISSN 0915-1559, Vol. 53, no 6, 979-987 p.Article in journal (Refereed) Published
A mathematical model based on the continuum mechanic concept has been developed to describe the profile of solid particles in an industrial scale blast furnace with respect to the in-furnace conditions and its characteristics such as the shape and size of the deadman. The Navier-Stokes differential equation for multi-phase multi-dimensional space has been used to describe the behavior of existing phases. The surface stress tensor has been defined as an extra term and added to the Navier-Stokes equation to describe the particle-particle interactions. This extra term in the Navier-Stokes equation behave as a breaking force when the particles are sliding down. It is shown that the particles change their profile from a V-shape to a W-shape due to the characteristics of the deadman. Moreover, the velocity magnitude is higher at the outer surface of the deadman for higher grid-slabs in this region than the near-wall cells. However, the situation changes as solid particles moving to even lower level of grid-slabs at the outer surface of the deadman in comparison to near-wall cells. It has also been shown that an increase in the magnitude of the effective pressure reduces the velocity magnitude of descending particles.
Place, publisher, year, edition, pages
2013. Vol. 53, no 6, 979-987 p.
mathematical modeling, blast furnace, solid flow, Navier-Stokes equation, surface stress tensor, effective pressure
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-125780DOI: 10.2355/isijinternational.53.979ISI: 000320973600007ScopusID: 2-s2.0-84881319205OAI: oai:DiVA.org:kth-125780DiVA: diva2:640673
QC 20130814. Updated from "Submitted" to "Published"2013-08-142013-08-132013-10-30Bibliographically approved