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Mechanisms of dust formation in LD-converter: conclusions from characterization of dust and thermodynamic modelling of condensed compounds in the gas duct
Luleå tekniska universitet.
Luleå tekniska universitet.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
1996 (English)In: 79th Steelmaking Conference proceedings: volume 79, Pittsburgh meeting, March 24 - 27, 1996, Pittsburgh, Pa: Iron and Steel Society , 1996, 755-762 p.Conference paper (Refereed)
Abstract [en]

To investigate the importance of the vaporization in the BOF process the vaporization from a steel bath was simulated together with the condensation of the resultant gas phase. An additional calculation was also made to simulate the condensation when the actual BOF dust composition was used. The course of condensation was investigated to determine the final products. The results from the calculation was compared with the results from hot gas sampling in the off gas system of a 100-t BOF. Four gas atmospheres were used to study the influence of the different oxygen potentials on the condensation reactions. Special emphasis was put on the condensation reactions of zinc. The results show the importance of the vaporization in the hot spot from which especially the elements having low vapour pressure will be vaporized. The increased oxygen potential will mostly influence the course of condensation but not very much the final products. The calculated condensation temperatures indicate a possible temperature span suitable for separation of zinc, alkali and chlorine gas from dust by gas treatment at high temperature in BOF. Dust are characterized by a complex mineralogical composition and especially the surface of the ejected metal and slag particles seem to be the nucleus for condensation and perhaps subsequent oxidation reactions

Place, publisher, year, edition, pages
Pittsburgh, Pa: Iron and Steel Society , 1996. 755-762 p.
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-35629Local ID: a3d45560-fcc9-11dc-a946-000ea68e967bISBN: 1-88636-211-4OAI: oai:DiVA.org:ltu-35629DiVA: diva2:1008882
Conference
Steelmaking Conference : 24/03/1996 - 27/03/1996
Note
Godkänd; 1996; 20080328 (cira)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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