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Yamaguchi Lab
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The lab uses high-temperature processes to extract and recirculate metals.
AboutAbout the lab
Rescue the rare earths
Yamaguchi Lab works on metal smelting using high-temperature processes and on the development of recycling processes.
Advanced industries such as automobiles and electronic and electrical equipment use many rare metals along with base metals such as iron and copper.
Because Japan relies on imports for most of its metal resources, there is an urgent need to develop technologies for recovering metal resources from used equipment, in addition to smelting.
A distinctive feature of the lab is the wide range of its research, from beaker-scale experiments to tests in large-scale operations.
Key terms
- Smelting
- A process that treats ores or scrap at high temperature to extract the target metal and raise its purity
- Rare metals
- Metals that are produced in small amounts or are difficult to extract. Many are essential for advanced products
- Rare earths
- A type of rare metal; a group of 17 elements used in applications such as strong magnets
NewsLab news
A master's student won the Excellent Poster Presentation Award at the 22nd "Resources, Materials and Environment" Technology and Research Exchange Meeting of the Mining and Materials Processing Institute of Japan (MMIJ)
A master's student won Best Poster at the 17th International Symposium on East Asian Resources Recycling Technology
A master's student won the 2023 Excellent Poster Award of the Society of Environmental and Resources Engineering
ResearchResearch themes
Yamaguchi Lab's research themes are developing metal smelting and recycling processes that use high temperatures, and understanding those processes academically. The lab often collaborates with companies, and results from the lab are sometimes used to improve actual operations.
*Illustrative imageRecovering Rare Earths from EV Motors
The magnets in electric vehicle motors use rare earths, whose resources are limited. The lab is developing a method to separate and extract rare earths from used motors using a flux, a reagent melted at high temperature.
*Illustrative imagePhase Diagrams of Metals Studied by Thermal Methods
In metal smelting and recycling, phase diagrams, which show what phases a metal takes at different temperatures, are indispensable. The lab investigates phase diagrams for combinations such as nickel, cobalt, and copper using methods that measure the heat absorbed and released.
MembersFaculty
- ProfessorKatsunori Yamaguchi
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Ore smelting furnace, Gedabey” Siemens Corporate Archives, Munich / Public domain (cropped)
- Recovering Rare Earths from EV Motors: “Yauza 209 (motor) stator and rotor mated together” Retired electrician / CC0 (cropped)
- Phase Diagrams of Metals Studied by Thermal Methods: “High-temperature vacuum furnace - DPLA - 986bac2d36f7b84476493d” 作者不詳 / Public domain (cropped)
- Related lab (Tokoro Lab): “Recycled Electronics - Circuit Boards ( )” Tony Webster from Minneapolis, Minnesota, United States / CC BY 2.0 (cropped)
- Related lab (Itsubo Lab): “Whole world - land and oceans 12000” NASA/Goddard Space Flight Center / Public domain (cropped)
- Related lab (Sasaki Lab): “Titanium(IV) oxide” Walkerma / Public domain (cropped)
- Related lab (Yamasaki Lab): “Zeolite & Fluorite ( )” Reimu Hakurei from Beijing, PRC / CC BY-SA 2.0 (cropped)
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