Characterization of a Chromium-Bearing Carbon Steel Electric Arc Furnace Slag after Magnetic Separation to Determine the Potential for Iron and Chromium Recovery
This study investigates the potential to recover iron and chromium from a chromium-bearing carbon steel Electric Arc Furnace (EAF) slag. This slag contains indeed about 30 wt.% Fe and 2.5 wt.% Cr. However, the minerals are intergrown at small scale (<100 µm) and iron and chromium are mostly conta...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/12/1/47 |
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| author | Kathy Bru Alain Seron Agnieszka Morillon David Algermissen Catherine Lerouge Nourredine Menad |
| author_facet | Kathy Bru Alain Seron Agnieszka Morillon David Algermissen Catherine Lerouge Nourredine Menad |
| author_sort | Kathy Bru |
| collection | DOAJ |
| description | This study investigates the potential to recover iron and chromium from a chromium-bearing carbon steel Electric Arc Furnace (EAF) slag. This slag contains indeed about 30 wt.% Fe and 2.5 wt.% Cr. However, the minerals are intergrown at small scale (<100 µm) and iron and chromium are mostly contained in spinel phases which makes the separation challenging. Several methods including Mössbauer spectroscopy, X-ray Diffraction, Scanning Electron Microscopy (SEM) and electron microprobe analysis were used in order to fully characterize the products obtained after a low-intensity magnetic separation of this carbon steel EAF slag, with the objective to define a pre-treatment process allowing the recovery of iron-rich particles and of a chromium-upgraded fraction. The results show that even if the magnetic separation seems to be not efficient in a first approach for producing an iron-rich/chromium-poor fraction, this fraction can be obtained by adding an attrition step which means that some separation mechanisms still occurred during the magnetic separation. However, it was not possible to produce a chromium-rich fraction. The main bottleneck for reaching a good separation is most probably the very fine liberation size of the iron and chromium bearing minerals. |
| first_indexed | 2024-03-10T00:51:46Z |
| format | Article |
| id | doaj.art-4ddf650b3de4460cbacef352560c6dcd |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T00:51:46Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-4ddf650b3de4460cbacef352560c6dcd2023-11-23T14:49:31ZengMDPI AGMinerals2075-163X2021-12-011214710.3390/min12010047Characterization of a Chromium-Bearing Carbon Steel Electric Arc Furnace Slag after Magnetic Separation to Determine the Potential for Iron and Chromium RecoveryKathy Bru0Alain Seron1Agnieszka Morillon2David Algermissen3Catherine Lerouge4Nourredine Menad5BRGM, F-45060 Orléans, FranceBRGM, F-45060 Orléans, FranceFEhS, 47229 Duisburg, GermanyFEhS, 47229 Duisburg, GermanyBRGM, F-45060 Orléans, FranceBRGM, F-45060 Orléans, FranceThis study investigates the potential to recover iron and chromium from a chromium-bearing carbon steel Electric Arc Furnace (EAF) slag. This slag contains indeed about 30 wt.% Fe and 2.5 wt.% Cr. However, the minerals are intergrown at small scale (<100 µm) and iron and chromium are mostly contained in spinel phases which makes the separation challenging. Several methods including Mössbauer spectroscopy, X-ray Diffraction, Scanning Electron Microscopy (SEM) and electron microprobe analysis were used in order to fully characterize the products obtained after a low-intensity magnetic separation of this carbon steel EAF slag, with the objective to define a pre-treatment process allowing the recovery of iron-rich particles and of a chromium-upgraded fraction. The results show that even if the magnetic separation seems to be not efficient in a first approach for producing an iron-rich/chromium-poor fraction, this fraction can be obtained by adding an attrition step which means that some separation mechanisms still occurred during the magnetic separation. However, it was not possible to produce a chromium-rich fraction. The main bottleneck for reaching a good separation is most probably the very fine liberation size of the iron and chromium bearing minerals.https://www.mdpi.com/2075-163X/12/1/47Electric Arc Furnace slagmagnetic separationattritionmulti-analytical characterization |
| spellingShingle | Kathy Bru Alain Seron Agnieszka Morillon David Algermissen Catherine Lerouge Nourredine Menad Characterization of a Chromium-Bearing Carbon Steel Electric Arc Furnace Slag after Magnetic Separation to Determine the Potential for Iron and Chromium Recovery Minerals Electric Arc Furnace slag magnetic separation attrition multi-analytical characterization |
| title | Characterization of a Chromium-Bearing Carbon Steel Electric Arc Furnace Slag after Magnetic Separation to Determine the Potential for Iron and Chromium Recovery |
| title_full | Characterization of a Chromium-Bearing Carbon Steel Electric Arc Furnace Slag after Magnetic Separation to Determine the Potential for Iron and Chromium Recovery |
| title_fullStr | Characterization of a Chromium-Bearing Carbon Steel Electric Arc Furnace Slag after Magnetic Separation to Determine the Potential for Iron and Chromium Recovery |
| title_full_unstemmed | Characterization of a Chromium-Bearing Carbon Steel Electric Arc Furnace Slag after Magnetic Separation to Determine the Potential for Iron and Chromium Recovery |
| title_short | Characterization of a Chromium-Bearing Carbon Steel Electric Arc Furnace Slag after Magnetic Separation to Determine the Potential for Iron and Chromium Recovery |
| title_sort | characterization of a chromium bearing carbon steel electric arc furnace slag after magnetic separation to determine the potential for iron and chromium recovery |
| topic | Electric Arc Furnace slag magnetic separation attrition multi-analytical characterization |
| url | https://www.mdpi.com/2075-163X/12/1/47 |
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