Realization of the Zone Length Measurement during Zone Refining Process via Implementation of an Infrared Camera

Since the temperature data captured by the IR camera refer to the surface emitted temperature, the calibration data were obtained by measuring the temperature of the metal with the thermocouple (type K) in a position slight below the melt surface. By selecting the appropriate color schemes, the molt...

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Bibliographic Details
Published in:Applied sciences Vol. 8; no. 6; p. 875
Main Authors: Curtolo, Danilo, Zhang, Xiaoxin, Rojas, Martin, Friedrich, Semiramis, Friedrich, Bernd
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-06-2018
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Summary:Since the temperature data captured by the IR camera refer to the surface emitted temperature, the calibration data were obtained by measuring the temperature of the metal with the thermocouple (type K) in a position slight below the melt surface. By selecting the appropriate color schemes, the molten zone (showed within the dashed rectangle) was recognized. [...]a series of thermographic pictures was recorded throughout the entire zone refining process to obtain the temperature distribution in the region, the zone length across the bar, as well as the exact growth rate. Since the zone refining process is very sensitive to temperature fluctuations generated for example by current or voltage fluctuation in the induction system, these aspects have to be taken into consideration while looking at the effective temperature values measured. [...]the program model gives an output signal to the zone refining equipment to fulfill the control of the zone length by regulating the power, heater movement velocity or cooling water flux, etc.
ISSN:2076-3417
2076-3417
DOI:10.3390/app8060875