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A Lorentz force flow meter for application at blast furnaces: design and calibration
Author(s) -
Hernández Daniel,
Karcher Christian,
Thess André
Publication year - 2014
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201410345
Subject(s) - lorentz force , magnetic flow meter , mechanics , magnet , calibration , magnetic field , flow measurement , flow (mathematics) , thermal mass flow meter , mass flow meter , metre , lorentz transformation , physics , chemistry , classical mechanics , mechanical engineering , engineering , quantum mechanics , astronomy
A reference Lorentz force flow meter (LFF) has been developed to measure molten steel mass flow at the end of the runner of an experimental blast furnace. It works according to the principles of Lorentz force velocimetry [1] in which a static magnetic field interacts with a liquid metal stream. The magnetic field lines are generated by an arrangement of permanent magnets and penetrate the entire cross‐section of the flow generating eddy currents and a total Lorentz force inside the melt. This force is proportional to the mass flow of the liquid metal and owing Newton's third law, there is a counter force of the same magnitude acting on the magnet system which is connected to a load cell. For accurate flow rate measurements, a “dry and wet calibration” of the LFF needs to be performed [2]. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)