Alumina Smelting


  • Industry:SmeltingEnvironmentMining

  • Processes:Calcination

Industry hurdles we face

Introducing Low-Carbon Alumina Smelting Utilizing microwave

Traditionally, alumina smelting involves converting aluminum hydroxide into α-alumina through calcination at temperatures exceeding 1,000°C. This process is heavily reliant on fossil fuels, making it a primary contributor to CO2 emissions within the alumina smelting process. Reducing CO2 emissions is a major challenge for the alumina smelting industry to achieve carbon neutrality.

We have developed “Green Mining-MX,” an electrification platform for the smelting process that uses microwaves to achieve high efficiency and significantly lower CO2 emissions, and will also contribute to the promotion of economic security.

Green Mining-MX

Results of Screening Tests

In laboratory tests, it was confirmed that aluminum hydroxide can be converted to α-alumina by microwave heating in a high temperature range. It was confirmed that the temperature can be raised rapidly by direct heating, which is a characteristic of microwaves.

Significance of Using Microwaves

By integrating microwaves with renewable energy sources, we’ve achieved a significant reduction in CO2 emissions.

Future Prospects

Electrifying Alumina Smelting: Paving the Way for a Decarbonized Future

As demand for aluminum is expected to increase in line with the shift to lighter weight automobiles due to EVs, the need for green aluminum, produced through low-carbon refining methods, is more critical than ever.We hope to contribute to the realization of carbon neutrality in the alumina and aluminum industries by providing microwave technology to smelters.