Investigation of the Impact of Biochar Application on Foaming Slags with Varied Compositions in Electric Arc Furnace-Based Steel Production
This paper investigates the influence of biochar, either as an individual component or in combination with high-temperature coke, on the slag foaming behavior. High-temperature coke serves as a reference. Three scenarios were considered to study the slag foaming behavior, each characterized by diffe...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-08-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/16/17/6325 |
| _version_ | 1827728091763441664 |
|---|---|
| author | Lina Kieush Johannes Schenk |
| author_facet | Lina Kieush Johannes Schenk |
| author_sort | Lina Kieush |
| collection | DOAJ |
| description | This paper investigates the influence of biochar, either as an individual component or in combination with high-temperature coke, on the slag foaming behavior. High-temperature coke serves as a reference. Three scenarios were considered to study the slag foaming behavior, each characterized by different slag chemical compositions. The results indicate that biochar can promote steady foaming for specific slags when the basicity (CaO/SiO<sub>2</sub>) falls within a range of 1.2 to 3.4. Experimental findings also reveal that stable foaming can be achieved when a mixture containing biochar and coke with a ratio of 1:1 is employed, with a minimum slag basicity of 1.0 and FeO content of 25 wt.%. The foaming range obtained using different FeO contents (15 wt.% to 40 wt.%) in the mixture surpasses the range observed with the individual application of coke or biochar. The X-ray diffraction (XRD) analysis showed that unrelated to the carbon source applied, the general pattern was that the phases larnite (Ca<sub>2</sub>SiO<sub>4</sub>) or dicalcium silicate were detected for slag foams with high basicity. Monticellite (CaMgSiO<sub>4</sub>) and magnesium iron oxide (Fe<sub>2</sub>MgO<sub>4</sub>) were predominant in slag foam samples, with the highest MgO content. The presence of monticellite and merwinite (Ca<sub>3</sub>MgSi<sub>2</sub>O<sub>8</sub>) occurred in samples with the lowest basicity. Eventually, the application of the mixture of coke and biochar showed the potential to obtain stable foaming across a wide range of slag compositions. |
| first_indexed | 2024-03-10T23:23:21Z |
| format | Article |
| id | doaj.art-35504da0173f49d2bc80229fb5b9594f |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T23:23:21Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-35504da0173f49d2bc80229fb5b9594f2023-11-19T08:06:21ZengMDPI AGEnergies1996-10732023-08-011617632510.3390/en16176325Investigation of the Impact of Biochar Application on Foaming Slags with Varied Compositions in Electric Arc Furnace-Based Steel ProductionLina Kieush0Johannes Schenk1Chair of Ferrous Metallurgy, Montanuniversitaet Leoben, 8700 Leoben, AustriaChair of Ferrous Metallurgy, Montanuniversitaet Leoben, 8700 Leoben, AustriaThis paper investigates the influence of biochar, either as an individual component or in combination with high-temperature coke, on the slag foaming behavior. High-temperature coke serves as a reference. Three scenarios were considered to study the slag foaming behavior, each characterized by different slag chemical compositions. The results indicate that biochar can promote steady foaming for specific slags when the basicity (CaO/SiO<sub>2</sub>) falls within a range of 1.2 to 3.4. Experimental findings also reveal that stable foaming can be achieved when a mixture containing biochar and coke with a ratio of 1:1 is employed, with a minimum slag basicity of 1.0 and FeO content of 25 wt.%. The foaming range obtained using different FeO contents (15 wt.% to 40 wt.%) in the mixture surpasses the range observed with the individual application of coke or biochar. The X-ray diffraction (XRD) analysis showed that unrelated to the carbon source applied, the general pattern was that the phases larnite (Ca<sub>2</sub>SiO<sub>4</sub>) or dicalcium silicate were detected for slag foams with high basicity. Monticellite (CaMgSiO<sub>4</sub>) and magnesium iron oxide (Fe<sub>2</sub>MgO<sub>4</sub>) were predominant in slag foam samples, with the highest MgO content. The presence of monticellite and merwinite (Ca<sub>3</sub>MgSi<sub>2</sub>O<sub>8</sub>) occurred in samples with the lowest basicity. Eventually, the application of the mixture of coke and biochar showed the potential to obtain stable foaming across a wide range of slag compositions.https://www.mdpi.com/1996-1073/16/17/6325biocharcokeslag foamingelectric arc furnaceX-ray diffraction analysis |
| spellingShingle | Lina Kieush Johannes Schenk Investigation of the Impact of Biochar Application on Foaming Slags with Varied Compositions in Electric Arc Furnace-Based Steel Production Energies biochar coke slag foaming electric arc furnace X-ray diffraction analysis |
| title | Investigation of the Impact of Biochar Application on Foaming Slags with Varied Compositions in Electric Arc Furnace-Based Steel Production |
| title_full | Investigation of the Impact of Biochar Application on Foaming Slags with Varied Compositions in Electric Arc Furnace-Based Steel Production |
| title_fullStr | Investigation of the Impact of Biochar Application on Foaming Slags with Varied Compositions in Electric Arc Furnace-Based Steel Production |
| title_full_unstemmed | Investigation of the Impact of Biochar Application on Foaming Slags with Varied Compositions in Electric Arc Furnace-Based Steel Production |
| title_short | Investigation of the Impact of Biochar Application on Foaming Slags with Varied Compositions in Electric Arc Furnace-Based Steel Production |
| title_sort | investigation of the impact of biochar application on foaming slags with varied compositions in electric arc furnace based steel production |
| topic | biochar coke slag foaming electric arc furnace X-ray diffraction analysis |
| url | https://www.mdpi.com/1996-1073/16/17/6325 |
| work_keys_str_mv | AT linakieush investigationoftheimpactofbiocharapplicationonfoamingslagswithvariedcompositionsinelectricarcfurnacebasedsteelproduction AT johannesschenk investigationoftheimpactofbiocharapplicationonfoamingslagswithvariedcompositionsinelectricarcfurnacebasedsteelproduction |