| Abstract Scope |
The LiMCA (Liquid Metal Cleanliness Analyzer) system, initially developed by Prof. Roderick Guthrie and Dr. Don Doutre at the McGill Metals Processing Centre (MMPC) in 1979, has undergone significant refinement and adaptation since its inception. This advancement has led to the creation of multiple variants tailored for various metal systems, including aluminum, magnesium, copper, iron, and steel. As a result, LiMCA has become the industry standard for real-time monitoring of non-metallic inclusions in liquid metals, particularly within the aluminum sector.
This paper provides a summary and critical assessment of the evolution of LiMCA technology, detailing key developments since its inception. In the final section, we discuss a modified design of the LiMCA system that has been used to measure the sizes, and size distributions, of microbubbles present within a liquid metal. Microbubbles are required to effect the removal of all sizes of inclusions from a melt, including sub-50 micron inclusions. |