Pretreatment of Manganese Ores in Different Gas-Atmospheres- a Method to Reduce Energy Consumption and Co2 Emissions in Mn-Alloy Production

12 Pages Posted: 28 Sep 2021

See all articles by Eli Ringdalen

Eli Ringdalen

SINTEF Industry

Jonas E Gjøvik

SINTEF Industry

Trine A Larssen

SINTEF Industry

Merete Tangstad

Norwegian University of Science and Technology (NTNU) - Department of Materials Science and Engineering

Date Written: September 12, 2021

Abstract

Pretreatment of manganese ores with sustainable energy sources has a potential for reducing energy consumption and CO2 emissions in manganese alloy production. Technologies to obtain this are currently being developed in EU H2020 project PreMa. Pretreatment of industrial manganese ores with different gas composition have been investigated experimentally in 1 kg scale with ore sizes used in industry. Degree of prereduction and fines formation varied with ore sources as well as with gas atmosphere and temperature. By heating in Argon, air, or CO2 gas the Mn-oxides were reduced to Mn2O3. Further reduction towards and down to MnO was only obtained when CO-containing gas was used. On-set temperatures for the different reactions are discussed

Keywords: Mn-alloy production, CO2 emissions, energy consumption, Pretreatment

Suggested Citation

Ringdalen, Eli and Gjøvik, Jonas E and Larssen, Trine A and Tangstad, Merete, Pretreatment of Manganese Ores in Different Gas-Atmospheres- a Method to Reduce Energy Consumption and Co2 Emissions in Mn-Alloy Production (September 12, 2021). Proceedings of the 16th International Ferro-Alloys Congress (INFACON XVI) 2021, Available at SSRN: https://ssrn.com/abstract=3930059 or http://dx.doi.org/10.2139/ssrn.3930059

Eli Ringdalen (Contact Author)

SINTEF Industry ( email )

Post box 4760 Torgarden
Trondheim, NO-7465
Norway

Jonas E Gjøvik

SINTEF Industry ( email )

Post box 4760 Torgarden
Trondheim, NO-7465
Norway

Trine A Larssen

SINTEF Industry ( email )

Post box 4760 Torgarden
Trondheim, NO-7465
Norway

Merete Tangstad

Norwegian University of Science and Technology (NTNU) - Department of Materials Science and Engineering ( email )

Trondheim NO-7491
Norway

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