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Laser-based elemental analysis of the top gas of a blast furnace

: Brysch, A.; Sturm, V.; Noll, R.; Denecke-Arnold, H.; Brinkmann, H.; Mülheims, K.; Opfermann, A.; Mavrommatis, K.; Gudenau, H.W.; Heinänen, K.

Verein Deutscher Ingenieure e.V. -VDI-, Kompetenzfeld Optische Technologien:
International Symposium on Photonics in Measurement 2002 : International Symposium, 11 - 12 June 2002, Aachen, Germany
Düsseldorf: VDI-Verlag, 2002 (VDI-Berichte 1694)
ISBN: 3-18-091694-X
S.117-123 : Ill., Lit.
International Symposium on Photonics in Measurement <2002, Aachen>
Fraunhofer ILT ()

The production of high quality hot metal in the steel-making industry with relatively low costs, is the most important prerequisite for an economically competitive quality/price ratio of the steel products. At a blast furnace the energy and mass balances are influenced by circulating materials like alkali, zinc and lead. Whereas the elements of the top gas are monitored by mass spectroscopy, the circulation materials that leave the blast furnace via the top gas dust, were not detectable so far. Up to now the metals in the dust are determined by taking samples at the dust separator and chemical analysis in the laboratory. In the scope of an European R&D project a measuring set-up based on LIBS was developed and evaluated in on-site tests at the top gas tube of two different blast furnaces to monitor continuously the circulation materials in order to assist the process control and optimise the blast furnace operation as well as to contribute to close the metallurgical mass balances.