Effect of Unburned Pulverized Coal on the Melting Characteristics and Fluidity of Blast Furnace Slag
A substantial amount of attention has been paid to viscosity due to its substantial effect on the fluid dynamics of molten blast furnace slag and slag metal reaction kinetics during the pyrometallurgy process. To clarify the influence mechanism of unburned pulverized coal (UPC) on blast furnace (BF)...
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MDPI AG
2021-05-01
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| author | Dongwen Xiang Fengman Shen Xin Jiang Qiangjian Gao Haiyan Zheng |
| author_facet | Dongwen Xiang Fengman Shen Xin Jiang Qiangjian Gao Haiyan Zheng |
| author_sort | Dongwen Xiang |
| collection | DOAJ |
| description | A substantial amount of attention has been paid to viscosity due to its substantial effect on the fluid dynamics of molten blast furnace slag and slag metal reaction kinetics during the pyrometallurgy process. To clarify the influence mechanism of unburned pulverized coal (UPC) on blast furnace (BF) slag viscosity, the effects of different contents of UPC on the BF slag viscosity, free-running temperature and viscous flow activation energy were investigated. The slag viscosity was measured by the rotating cylinder method, and the microstructure of the cooled slag was observed by SEM. As a result, the main reason for a change in the slag viscosity, free-running temperature and viscous flow activation energy was that the UPC entering the slag formed a large number of white particles that predominantly comprised deposited carbon and a high melting point solid solution. In addition, the disintegration or polymerization of the Si<sub>x</sub><inline-formula><math display="inline"><semantics><msubsup><mi mathvariant="normal">O</mi><mi>y</mi><mrow><mi>z</mi><mo>-</mo></mrow></msubsup></semantics></math></inline-formula> structure was also a contributing factor. When the content of the UPC was 0.6%, the free-running temperature and viscous flow activation energy of slag were 1623 K and 120.969 kJ/mol, respectively, which are lower than those of the slag without UPC. However, the free-running temperature and viscous flow activation energy increased to 1668 K and 286.625 kJ/mol, respectively, when the content of UPC increased to 4%, which are higher than those of slag without UPC. |
| first_indexed | 2024-03-10T11:09:54Z |
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| id | doaj.art-05480f343f024c56a50b07d7d2361dfd |
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| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T11:09:54Z |
| publishDate | 2021-05-01 |
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| series | Crystals |
| spelling | doaj.art-05480f343f024c56a50b07d7d2361dfd2023-11-21T20:51:43ZengMDPI AGCrystals2073-43522021-05-0111657910.3390/cryst11060579Effect of Unburned Pulverized Coal on the Melting Characteristics and Fluidity of Blast Furnace SlagDongwen Xiang0Fengman Shen1Xin Jiang2Qiangjian Gao3Haiyan Zheng4School of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaA substantial amount of attention has been paid to viscosity due to its substantial effect on the fluid dynamics of molten blast furnace slag and slag metal reaction kinetics during the pyrometallurgy process. To clarify the influence mechanism of unburned pulverized coal (UPC) on blast furnace (BF) slag viscosity, the effects of different contents of UPC on the BF slag viscosity, free-running temperature and viscous flow activation energy were investigated. The slag viscosity was measured by the rotating cylinder method, and the microstructure of the cooled slag was observed by SEM. As a result, the main reason for a change in the slag viscosity, free-running temperature and viscous flow activation energy was that the UPC entering the slag formed a large number of white particles that predominantly comprised deposited carbon and a high melting point solid solution. In addition, the disintegration or polymerization of the Si<sub>x</sub><inline-formula><math display="inline"><semantics><msubsup><mi mathvariant="normal">O</mi><mi>y</mi><mrow><mi>z</mi><mo>-</mo></mrow></msubsup></semantics></math></inline-formula> structure was also a contributing factor. When the content of the UPC was 0.6%, the free-running temperature and viscous flow activation energy of slag were 1623 K and 120.969 kJ/mol, respectively, which are lower than those of the slag without UPC. However, the free-running temperature and viscous flow activation energy increased to 1668 K and 286.625 kJ/mol, respectively, when the content of UPC increased to 4%, which are higher than those of slag without UPC.https://www.mdpi.com/2073-4352/11/6/579unburned pulverized coalblast furnace slag viscosityfree-running temperatureviscous flow activation energy |
| spellingShingle | Dongwen Xiang Fengman Shen Xin Jiang Qiangjian Gao Haiyan Zheng Effect of Unburned Pulverized Coal on the Melting Characteristics and Fluidity of Blast Furnace Slag Crystals unburned pulverized coal blast furnace slag viscosity free-running temperature viscous flow activation energy |
| title | Effect of Unburned Pulverized Coal on the Melting Characteristics and Fluidity of Blast Furnace Slag |
| title_full | Effect of Unburned Pulverized Coal on the Melting Characteristics and Fluidity of Blast Furnace Slag |
| title_fullStr | Effect of Unburned Pulverized Coal on the Melting Characteristics and Fluidity of Blast Furnace Slag |
| title_full_unstemmed | Effect of Unburned Pulverized Coal on the Melting Characteristics and Fluidity of Blast Furnace Slag |
| title_short | Effect of Unburned Pulverized Coal on the Melting Characteristics and Fluidity of Blast Furnace Slag |
| title_sort | effect of unburned pulverized coal on the melting characteristics and fluidity of blast furnace slag |
| topic | unburned pulverized coal blast furnace slag viscosity free-running temperature viscous flow activation energy |
| url | https://www.mdpi.com/2073-4352/11/6/579 |
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