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Mathematical model of solid flow behavior in a real dimension blast furnace
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, MEFOS. KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden; FOI Swedish Defence Research Agency, Sweden.
KTH Royal Institute of Technology, Sweden.
2013 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 53, no 6, p. 979-987Article in journal (Refereed) Published
Abstract [en]

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, p. 979-987
Keywords [en]
Blast furnace, Effective pressure, Mathematical modeling, Navier-Stokes equation, Solid flow, Surface stress tensor
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-12662DOI: 10.2355/isijinternational.53.979Scopus ID: 2-s2.0-84881319205OAI: oai:DiVA.org:ri-12662DiVA, id: diva2:972854
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2020-11-11Bibliographically approved

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