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ORGANIZER;CN='8th ECIC & 9th ICSTI 2022':MAILTO:info@ecic-icsti.com
LOCATION:Room „Focke Wulf“
SUMMARY:BF-process monitoring with a soft-sensor for the online measurement of dust concentration in the top gas
DESCRIPTION:The dust in the blast furnace top gas has for a long time been regarded only as a process residue which must be handled somehow. Correspondingly, little attention was paid to the time course of the dust concentration - although it carries important information about the furnace’s working state. Excessive dust generation was proven to signalise upcoming operational issues which detract efficiency and production. A proper combination of online dust supervision and fingerprinting with operational data evaluation allows to predict operational problems in advance. This early error recognition enables to improve process control and efficiency: good reason to monitor the dust formation.
Therefore, VDEh Betriebsforschungsinstitut has developed an online top gas dust concentration measurement system based on the soft-sensor principle. In the first step, part of the top gas is washed in a small scrubber and the slurry is directed to the MAGS sensor. The mass of dust separated on a magnet is continuously measured. In the second step, this value is transformed by a software model to the information about the total dust concentration in the top gas to deliver continuous knowledge about the current furnace state.
The sensor MAGS has been applied to blast furnace B at the Salzgitter Flachstahl site. The obtained data reveals new information about the dust formation during charging of different materials, but also about the dust concentration arising from the process in between the chargings. A clear relation between dust formation and process state could be shown. Proper interpretation of the MAGS measurements enables a new facet of blast furnace working state monitoring. This article informs about the technical concept of the soft-sensor and provides an insight about the so far received knowledge from analysis of the obtained data. The sensor is currently in a long-term trial at the Salzgitter Flachstahl site.

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DTSTART:20220632T083000
DTEND:20220632T085500
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