An overview of recent developments in experimental and numerical studies for the in-situ measurement of large inclusions (~50-400 microns) in liquid steel processing vessels

摘要

The development of a sensor for the direct detection of inclusions in liquid steel has been a challenging problem, owing to the high temperatures (1600-1700 °C), and materials problems, such as thermal shock, corrosion, melting, dissolution, blockage of orifice, etc. In 2005, Heraeus- Electronite succeeded in developing commercial units, in collaboration with Sumitomo Metals Industries of Japan, and McGill University researchers. In the present paper, the application of the LiMCA (Liquid Metal Cleanliness Analyser) technique to steel melts is studied theoretically, in order to help in the understanding and analysis of in-situ experimental measurements of inclusion size and frequency distributions in steel plant processing operations. The relevance of these theoretical studies to the interpretation of plant data are addressed.