Effect of Raw Materials on Temperature Development during Prereduction of Comilog and Nchwaning Manganese Ores
The effect of raw materials on the temperature development and prereduction behavior of Comilog and Nchwaning manganese ores (3.33–4.00 mm or 11.20–15.00 mm) were investigated in a CO-CO<sub>2</sub> atmosphere. Experiments were conducted at a heating rate of 6 °C/min from room temperatur...
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MDPI AG
2023-07-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/7/920 |
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| author | Trine A. Larssen Merete Tangstad |
| author_facet | Trine A. Larssen Merete Tangstad |
| author_sort | Trine A. Larssen |
| collection | DOAJ |
| description | The effect of raw materials on the temperature development and prereduction behavior of Comilog and Nchwaning manganese ores (3.33–4.00 mm or 11.20–15.00 mm) were investigated in a CO-CO<sub>2</sub> atmosphere. Experiments were conducted at a heating rate of 6 °C/min from room temperature to 1000 °C where the ore was mixed with inert material (quartz) in various ratios. A similar heating program gave dissimilar temperature development for Comilog and Nchwaning ores due to differences in oxygen levels and reduction rates. The temperature development, and thus reduction rate, decreased with the increasing amount of inert material in the mix for Comilog ore in size 3.33–4.00 mm. The peak reaction rates observed during reduction were 2.4 wt%/min, 1.0 wt%/min, and 0.8 wt%/min for an ore:quartz weight ratio of 1:0, 1:1, and 1:3, respectively. For Comilog ore in size 11.20–15.00 mm, and Nchwaning ore in both sizes, the temperature development and reduction rates were slightly or insignificantly affected. It was suggested that the effect was low for reactions under a diffusion-controlled kinetic regime. |
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| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-11T00:48:19Z |
| publishDate | 2023-07-01 |
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| series | Minerals |
| spelling | doaj.art-d47e451ee8f64911b14e04b47e23a7642023-11-18T20:38:53ZengMDPI AGMinerals2075-163X2023-07-0113792010.3390/min13070920Effect of Raw Materials on Temperature Development during Prereduction of Comilog and Nchwaning Manganese OresTrine A. Larssen0Merete Tangstad1SINTEF AS, 7034 Trondheim, NorwayDepartment of Materials Science and Engineering, Norwegian University of Science and Technology, 7034 Trondheim, NorwayThe effect of raw materials on the temperature development and prereduction behavior of Comilog and Nchwaning manganese ores (3.33–4.00 mm or 11.20–15.00 mm) were investigated in a CO-CO<sub>2</sub> atmosphere. Experiments were conducted at a heating rate of 6 °C/min from room temperature to 1000 °C where the ore was mixed with inert material (quartz) in various ratios. A similar heating program gave dissimilar temperature development for Comilog and Nchwaning ores due to differences in oxygen levels and reduction rates. The temperature development, and thus reduction rate, decreased with the increasing amount of inert material in the mix for Comilog ore in size 3.33–4.00 mm. The peak reaction rates observed during reduction were 2.4 wt%/min, 1.0 wt%/min, and 0.8 wt%/min for an ore:quartz weight ratio of 1:0, 1:1, and 1:3, respectively. For Comilog ore in size 11.20–15.00 mm, and Nchwaning ore in both sizes, the temperature development and reduction rates were slightly or insignificantly affected. It was suggested that the effect was low for reactions under a diffusion-controlled kinetic regime.https://www.mdpi.com/2075-163X/13/7/920manganese oresprereductiongas-solid reactionsferromanganese production |
| spellingShingle | Trine A. Larssen Merete Tangstad Effect of Raw Materials on Temperature Development during Prereduction of Comilog and Nchwaning Manganese Ores Minerals manganese ores prereduction gas-solid reactions ferromanganese production |
| title | Effect of Raw Materials on Temperature Development during Prereduction of Comilog and Nchwaning Manganese Ores |
| title_full | Effect of Raw Materials on Temperature Development during Prereduction of Comilog and Nchwaning Manganese Ores |
| title_fullStr | Effect of Raw Materials on Temperature Development during Prereduction of Comilog and Nchwaning Manganese Ores |
| title_full_unstemmed | Effect of Raw Materials on Temperature Development during Prereduction of Comilog and Nchwaning Manganese Ores |
| title_short | Effect of Raw Materials on Temperature Development during Prereduction of Comilog and Nchwaning Manganese Ores |
| title_sort | effect of raw materials on temperature development during prereduction of comilog and nchwaning manganese ores |
| topic | manganese ores prereduction gas-solid reactions ferromanganese production |
| url | https://www.mdpi.com/2075-163X/13/7/920 |
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