Effects of Basicity and Al<sub>2</sub>O<sub>3</sub> Content on Viscosity and Crystallization Behavior of Super-High-Alumina Slag
The CaO-SiO<sub>2</sub>-MgO-Al<sub>2</sub>O<sub>3</sub> slags with high alumina content are widely applied in various pyrometallurgical processes. However, for super-high-alumina slags, especially for those with alumina content of more than 25 wt%, there is a lack...
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MDPI AG
2022-06-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/6/851 |
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| author | Shuai Wang Ying Jiang Yufeng Guo Zhuang Yang Feng Chen Lingzhi Yang Guang Li |
| author_facet | Shuai Wang Ying Jiang Yufeng Guo Zhuang Yang Feng Chen Lingzhi Yang Guang Li |
| author_sort | Shuai Wang |
| collection | DOAJ |
| description | The CaO-SiO<sub>2</sub>-MgO-Al<sub>2</sub>O<sub>3</sub> slags with high alumina content are widely applied in various pyrometallurgical processes. However, for super-high-alumina slags, especially for those with alumina content of more than 25 wt%, there is a lack of relevant studies about the properties of slag. The melting behavior, viscosity, structural property, and crystallization behavior of high-alumina slag with the fixed MgO content of 11.13 wt% and Al<sub>2</sub>O<sub>3</sub> content from 27.61 wt% to 40 wt% were investigated. The results revealed that the liquidus temperatures and complete solidification temperatures of slag increased with the increasing binary basicity and Al<sub>2</sub>O<sub>3</sub> content. The melting temperature and viscosity of the CaO-SiO<sub>2</sub>-11.13wt%MgO-Al<sub>2</sub>O<sub>3</sub> slag system increased with the increasing basicity from 0.8 to 1 and Al<sub>2</sub>O<sub>3</sub> content from 27.61 wt% to 40 wt%. The increase in Al<sub>2</sub>O<sub>3</sub> caused the formation of high-crystallinity and high melting point materials in the slag, such as spinel and Åkermanite. A large number of non-uniform phases could quickly crystallize out of the solids present in the slag melt, thereby increasing the slag viscosity and deteriorating the fluidity of the slag. |
| first_indexed | 2024-03-10T00:03:43Z |
| format | Article |
| id | doaj.art-d5eb00fe6abc42bd81aa89bd94512842 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T00:03:43Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-d5eb00fe6abc42bd81aa89bd945128422023-11-23T16:13:00ZengMDPI AGCrystals2073-43522022-06-0112685110.3390/cryst12060851Effects of Basicity and Al<sub>2</sub>O<sub>3</sub> Content on Viscosity and Crystallization Behavior of Super-High-Alumina SlagShuai Wang0Ying Jiang1Yufeng Guo2Zhuang Yang3Feng Chen4Lingzhi Yang5Guang Li6School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaThe CaO-SiO<sub>2</sub>-MgO-Al<sub>2</sub>O<sub>3</sub> slags with high alumina content are widely applied in various pyrometallurgical processes. However, for super-high-alumina slags, especially for those with alumina content of more than 25 wt%, there is a lack of relevant studies about the properties of slag. The melting behavior, viscosity, structural property, and crystallization behavior of high-alumina slag with the fixed MgO content of 11.13 wt% and Al<sub>2</sub>O<sub>3</sub> content from 27.61 wt% to 40 wt% were investigated. The results revealed that the liquidus temperatures and complete solidification temperatures of slag increased with the increasing binary basicity and Al<sub>2</sub>O<sub>3</sub> content. The melting temperature and viscosity of the CaO-SiO<sub>2</sub>-11.13wt%MgO-Al<sub>2</sub>O<sub>3</sub> slag system increased with the increasing basicity from 0.8 to 1 and Al<sub>2</sub>O<sub>3</sub> content from 27.61 wt% to 40 wt%. The increase in Al<sub>2</sub>O<sub>3</sub> caused the formation of high-crystallinity and high melting point materials in the slag, such as spinel and Åkermanite. A large number of non-uniform phases could quickly crystallize out of the solids present in the slag melt, thereby increasing the slag viscosity and deteriorating the fluidity of the slag.https://www.mdpi.com/2073-4352/12/6/851viscositycrystallization behaviorhigh-alumina slagbasicityspinel |
| spellingShingle | Shuai Wang Ying Jiang Yufeng Guo Zhuang Yang Feng Chen Lingzhi Yang Guang Li Effects of Basicity and Al<sub>2</sub>O<sub>3</sub> Content on Viscosity and Crystallization Behavior of Super-High-Alumina Slag Crystals viscosity crystallization behavior high-alumina slag basicity spinel |
| title | Effects of Basicity and Al<sub>2</sub>O<sub>3</sub> Content on Viscosity and Crystallization Behavior of Super-High-Alumina Slag |
| title_full | Effects of Basicity and Al<sub>2</sub>O<sub>3</sub> Content on Viscosity and Crystallization Behavior of Super-High-Alumina Slag |
| title_fullStr | Effects of Basicity and Al<sub>2</sub>O<sub>3</sub> Content on Viscosity and Crystallization Behavior of Super-High-Alumina Slag |
| title_full_unstemmed | Effects of Basicity and Al<sub>2</sub>O<sub>3</sub> Content on Viscosity and Crystallization Behavior of Super-High-Alumina Slag |
| title_short | Effects of Basicity and Al<sub>2</sub>O<sub>3</sub> Content on Viscosity and Crystallization Behavior of Super-High-Alumina Slag |
| title_sort | effects of basicity and al sub 2 sub o sub 3 sub content on viscosity and crystallization behavior of super high alumina slag |
| topic | viscosity crystallization behavior high-alumina slag basicity spinel |
| url | https://www.mdpi.com/2073-4352/12/6/851 |
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