Mechanism of Influence of Soluble Fluorine on Mechanical Properties of α-Hemihydrous Gypsum
This is an article in the field of mineral materials. The preparation of α-hemihydrate gypsum from phosphogypsum instead of natural gypsum is an important way of its high value-added utilization. However, soluble fluorine impurities in phosphogypsum will have adverse effects on α-hemihydrate gypsum....
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| Format: | Article |
| Language: | zho |
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Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences
2024-12-01
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| Series: | Kuangchan zonghe liyong |
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| Online Access: | http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2024.06.024 |
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| author | Lusong WANG Xianbo LI Weifan DU Wenxin GAO |
| author_facet | Lusong WANG Xianbo LI Weifan DU Wenxin GAO |
| author_sort | Lusong WANG |
| collection | DOAJ |
| description | This is an article in the field of mineral materials. The preparation of α-hemihydrate gypsum from phosphogypsum instead of natural gypsum is an important way of its high value-added utilization. However, soluble fluorine impurities in phosphogypsum will have adverse effects on α-hemihydrate gypsum. In this article, the effect of soluble fluorine on the setting time and the strength of the hardened body of α-hemihydrate gypsum was studied, and its mechanism was explored by XRD, SEM-EDS and XPS. The results show that soluble fluorine can shorten the setting time and decrease the mechanical strength of α-hemihydrate gypsum. The microstructure analysis of hardened body shows that soluble fluorine can coarsen the particles of gypsum dihydrate, increase the internal pores, and reduce the mechanical strength. XRD and XPS analysis show that soluble fluorine reacts with Ca2+ generated by the dissolution of α-hemihydrate gypsum to form calcium fluoride with smaller solubility product, thus shortening the setting time of α-hemihydrate gypsum. |
| format | Article |
| id | doaj-art-c638cbf19bd64394809ba5abf87cc804 |
| institution | Kabale University |
| issn | 1000-6532 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences |
| record_format | Article |
| series | Kuangchan zonghe liyong |
| spelling | doaj-art-c638cbf19bd64394809ba5abf87cc8042025-01-16T07:32:24ZzhoInstitute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological SciencesKuangchan zonghe liyong1000-65322024-12-0145615316010.3969/j.issn.1000-6532.2024.06.0242024-06wanglusongMechanism of Influence of Soluble Fluorine on Mechanical Properties of α-Hemihydrous GypsumLusong WANG0Xianbo LI1Weifan DU2Wenxin GAO3Mining College, Guizhou University, Guiyang 550025, Guizhou, ChinaMining College, Guizhou University, Guiyang 550025, Guizhou, ChinaMining College, Guizhou University, Guiyang 550025, Guizhou, ChinaMining College, Guizhou University, Guiyang 550025, Guizhou, ChinaThis is an article in the field of mineral materials. The preparation of α-hemihydrate gypsum from phosphogypsum instead of natural gypsum is an important way of its high value-added utilization. However, soluble fluorine impurities in phosphogypsum will have adverse effects on α-hemihydrate gypsum. In this article, the effect of soluble fluorine on the setting time and the strength of the hardened body of α-hemihydrate gypsum was studied, and its mechanism was explored by XRD, SEM-EDS and XPS. The results show that soluble fluorine can shorten the setting time and decrease the mechanical strength of α-hemihydrate gypsum. The microstructure analysis of hardened body shows that soluble fluorine can coarsen the particles of gypsum dihydrate, increase the internal pores, and reduce the mechanical strength. XRD and XPS analysis show that soluble fluorine reacts with Ca2+ generated by the dissolution of α-hemihydrate gypsum to form calcium fluoride with smaller solubility product, thus shortening the setting time of α-hemihydrate gypsum.http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2024.06.024mineral materialsα-hemihydrate gypsumsoluble fluorinemechanical strengthsetting timeinfluence mechanism |
| spellingShingle | Lusong WANG Xianbo LI Weifan DU Wenxin GAO Mechanism of Influence of Soluble Fluorine on Mechanical Properties of α-Hemihydrous Gypsum Kuangchan zonghe liyong mineral materials α-hemihydrate gypsum soluble fluorine mechanical strength setting time influence mechanism |
| title | Mechanism of Influence of Soluble Fluorine on Mechanical Properties of α-Hemihydrous Gypsum |
| title_full | Mechanism of Influence of Soluble Fluorine on Mechanical Properties of α-Hemihydrous Gypsum |
| title_fullStr | Mechanism of Influence of Soluble Fluorine on Mechanical Properties of α-Hemihydrous Gypsum |
| title_full_unstemmed | Mechanism of Influence of Soluble Fluorine on Mechanical Properties of α-Hemihydrous Gypsum |
| title_short | Mechanism of Influence of Soluble Fluorine on Mechanical Properties of α-Hemihydrous Gypsum |
| title_sort | mechanism of influence of soluble fluorine on mechanical properties of α hemihydrous gypsum |
| topic | mineral materials α-hemihydrate gypsum soluble fluorine mechanical strength setting time influence mechanism |
| url | http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2024.06.024 |
| work_keys_str_mv | AT lusongwang mechanismofinfluenceofsolublefluorineonmechanicalpropertiesofahemihydrousgypsum AT xianboli mechanismofinfluenceofsolublefluorineonmechanicalpropertiesofahemihydrousgypsum AT weifandu mechanismofinfluenceofsolublefluorineonmechanicalpropertiesofahemihydrousgypsum AT wenxingao mechanismofinfluenceofsolublefluorineonmechanicalpropertiesofahemihydrousgypsum |