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Hayashi Lab
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The lab uses high-temperature chemistry to work on ironmaking and resource recycling.
AboutAbout the lab
Toward a carbon-neutral society.
The Hayashi Lab focuses on 'carbon-neutral ironmaking,' which reduces carbon dioxide emissions.
The lab works on iron raw materials suited to blast furnaces that use a large amount of hydrogen, lubricants (mold fluxes) used in casting high-grade steel, and methods of using steelmaking slag in cement.
The lab also pursues research that applies high-temperature physical chemistry to industry, such as the recycling of non-ferrous materials.
Key terms
- Blast furnace
- A large furnace that extracts iron from iron ore. It uses carbon to remove oxygen from the ore.
- Slag
- A mass of non-metallic components that separates out when metal is produced.
- Carbon neutrality
- Balancing the carbon dioxide emitted against the amount absorbed or reduced, so that the net amount is zero.
ResearchResearch themes
The lab conducts research that applies high-temperature physical chemistry to industry, centered on carbon-neutral ironmaking. Its scope extends from ferrous and non-ferrous metallurgy to the recycling of materials as resources.
*Illustrative imageThe chemistry of sintering iron ore
Ironmaking uses sinter, made by heating and consolidating iron ore with limestone and other materials. The lab remeasures the phases that iron-rich oxides form at high temperature and examines how they change when alumina is mixed in, seeking clues for producing good raw materials with less energy.
*Illustrative imageHeat transfer in molten slag
How readily the molten slag (the byproduct) from ironmaking conducts heat is important for furnace operation and heat recovery. The lab develops a method for measuring the thermal conductivity of molten silicates and clarifies the relationship between their structure and thermal properties.
*Illustrative imageUsing slag as a resource
This research uses the large amounts of slag produced in ironmaking as a resource for construction materials and other applications. The lab investigates the relationship between the chemical properties of blast furnace slag and how strength develops in materials mixed with it, as well as methods that use the heat released when iron oxidizes.
MembersFaculty
- ProfessorMiyuki HayashiPublications ↗
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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: “Appleby Frodingham Steelworks - blast furnace complex - geograph.org.uk - 5923906” Chris Allen / CC BY-SA 2.0 (cropped)
- The chemistry of sintering iron ore: “Sinter plant 7” Vyacheslav Bukharov / CC BY-SA 4.0 (cropped)
- Heat transfer in molten slag: “Slag runoff Republic Steel” Alfred T. Palmer, FSA-OWI / Public domain (cropped)
- Using slag as a resource: “Samples of "ground granulated blast furnace slag" and "granulated blast furnace slag"” Giám Định / CC BY-SA 4.0 (cropped)
- Related lab (小林能直研究室): “Flaring of Converter Gas at Night” Aciarium / CC BY 4.0 (cropped)
- Related lab (阿部研究室): “BiodegradablePlasticUtensils1” Scott Bauer / Public domain (cropped)
- Related lab (鎌田研究室): “Perovskite-Magnetite-207500” Robert M. Lavinsky / CC BY-SA 3.0 (cropped)
- Related lab (安井研究室): “Ceramic fracture” Mtbusca / CC BY 4.0 (cropped)
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