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Investigation of complex permittivity spectra of foundry sands

Title data

Bifano, Luca ; Fischerauer, Alice ; Fischerauer, Gerhard:
Investigation of complex permittivity spectra of foundry sands.
In: Fischerauer, Alice ; Erni, Daniel ; Himmel, Jörg ; Seeger, Thomas ; Thelen, Klaus , University of Applied Sciences Ruhr West (ed.): IEEE Workshop on Industrial and Medical Measurement and Sensor Technology Vehicle Sensor Technology (SENSORICA 2019) : Abstractbook. - Mülheim a. d. Ruhr , 2019 . - pp. 42-43 . - (Series of lectures of the University of Applied Sciences Ruhr West ; 7 )
ISBN 978-3-946757-00-9

Abstract in another language

Foundries producing cast iron parts work with special sand mixtures in their moulding processes. For the forming of the outer surfaces, moulding sand is used, usually a mixture containing mainly used quartz sand, bentonite as binding agent, and water. The bentonite in this form sand is partly active – it can still absorb water – and partly dead-burnt. The inner cavities of the castings are formed by sand cores ideally made from chromite sand, new quartz sand, and an organic binder. Since new quartz sand becomes an increasingly costly resource, it is partly replaced by regenerated core sand. This reclaim (regenerated sand) is produced by a regeneration process, where used core sand from the broken core is taken when the casting is unpacked. Obviously it is not possible to separate broken core sand from broken moulding sand during unpacking. Owing to this, some moulding sand, which is still coated with bentonite, is carried into the gathered core sand. This mixture has to be cleaned from the bentonite by the regeneration process in order to obtain a reclaim, which is similar enough to the ideal core sand to be of use. In order to monitor the regeneration process and to decide on the quality of the reclaim, we use impedance spectroscopy to obtain information about the mass fractions of chromite sand, moulding sand, and reclaim of a given sand sample.

Further data

Item Type: Article in a book
Related institutions (e.g. sponsor, organisator): IEEE, Instrumentation and Measurement (IM) Society, Germany Section
Refereed: No
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 12 Jun 2019 07:37
Last Modified: 12 Jun 2019 07:37
URI: https://eref.uni-bayreuth.de/id/eprint/49471