CONTROL & MEASUREMENT Accurate Temperature Measurement of Metal
Pouring Streams Advanced Energy’s Impac® pyrometers address challenges in temperature monitoring of the pouring stream in castings made of different alloys
Accurate and undisturbed temperature measurement of the pouring stream can only be obtained by non-contact measurement via pyrometers. When castings are made of different alloys, conventional pyrometers and ratio pyrometers often cannot be used to measure the pouring stream due to considerable differences in measuring conditions and metal characteristics.
Due to extremely high ambient heat, fixed measurement systems require rugged industrial designs to overcome the challenges that hinder accurate temperature measurement of the pouring steam – from changes in stream location and width, start and stop time variation, as well as slag interference.
Advanced Energy’s specialized Impac® pyrometer solutions address these challenges and provide robust and accurate temperature measurement by using a special measurement system for this application. The Impac ISR 12-LO/GS measures the exact casting temperature of each pouring process and displays them online. Corrective action can be taken immediately if defined limits are exceeded, which maintains the narrow process window for quality castings.
Designed specifically for accurate measurement of pouring streams, the Impac ISR 12-LO/GS features:
• Armored fiber optic cables with high-temperature precision optics lens head that enables it to be securely mounted in difficult installation areas.
In most foundries, the temperature of the metal melt is typically measured by thermocouple immersion probes. These immersion measurements can only be made in the crucibles or the transfer ladles where the melt is stationary, but not in the pouring stream where insertion of a probe would disturb the flow into the cast. However, the direct temperature of the pouring stream is critical to the quality of the final casting. Continuous monitoring of the pouring steam temperature and pour quality enables better control of the casting process.
• Line spot shape optical beam that minimizes the effects of pour stream location variation. An integrated laser targeting function eases alignment. An automated lens- contamination warning function is also included.
• A short wavelength ratio detector that maximizes signal from low emissivity metals and minimizes systematic errors due to emissivity changes, as well as interference from dust and vapor.
working under rugged ambient conditions MARCH/APRIL 2023
www.reviewonline.uk.com
Steel pouring process in foundries 11
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32
