Research on the Flotation Mechanism of Microemulsion Collector Enhanced Removal of Dyeing Impurities from Phosphogypsum
Phosphogypsum is an industrial byproduct that is limited in its high-value application due to the presence of dyeing impurities (such as organic matter and carbon black). The flotation method has been verified to be effective in separating these dyeing impurities from gypsum. In this study, microemu...
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2024-12-01
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| author | Xiaosheng Yu Lijun Deng Changpan Shen Huiyong Li Jingchao Li Yijun Cao Guoli Zhou Guosheng Li |
| author_facet | Xiaosheng Yu Lijun Deng Changpan Shen Huiyong Li Jingchao Li Yijun Cao Guoli Zhou Guosheng Li |
| author_sort | Xiaosheng Yu |
| collection | DOAJ |
| description | Phosphogypsum is an industrial byproduct that is limited in its high-value application due to the presence of dyeing impurities (such as organic matter and carbon black). The flotation method has been verified to be effective in separating these dyeing impurities from gypsum. In this study, microemulsion was used as the collector method of dyeing impurities for their separation from gypsum. The results of flotation tests showed that the microemulsion collector exhibited excellent collection capability and selectivity under natural pH conditions (pH = 1.5). With a microemulsion collector consumption of 400 g/t, purified gypsum of 65.1% whiteness, 95.74% yield, and 97.01% recovery was obtained. The purified gypsum of 65.1% whiteness, 95.74% yield, 97.01 recovery obtained by a used microemulsion collector amount of 400 g/t was better than using the same dosage of kerosene collector. The dispersion behavior of the microemulsion collector was studied by low-temperature transmission electron microscopy. The microemulsion collector demonstrated superior dispersibility, as it forms nano-oil droplets with an average size of 176.83 nm in the pulp, resolving issues associated with poor dispersibility observed in traditional kerosene collectors. Additionally, the nano-oil droplets effectively adsorbed onto the surface of dyeing impurities through hydrogen bonding, enhancing their hydrophobicity. Therefore, the microemulsion collector holds great potential for application in flotation whitening processes involving phosphogypsum. |
| format | Article |
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| institution | Kabale University |
| issn | 2297-8739 |
| language | English |
| publishDate | 2024-12-01 |
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| spelling | doaj-art-af23932a98844ec59cb62f8bb6eb4dc92025-01-24T13:49:30ZengMDPI AGSeparations2297-87392024-12-01121710.3390/separations12010007Research on the Flotation Mechanism of Microemulsion Collector Enhanced Removal of Dyeing Impurities from PhosphogypsumXiaosheng Yu0Lijun Deng1Changpan Shen2Huiyong Li3Jingchao Li4Yijun Cao5Guoli Zhou6Guosheng Li7School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaCenter of Advanced Analysis & Gene Sequencing, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaThe Key Lab of Critical Metals Minerals Supernormal Enrichment and Extraction, Ministry of Education, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaThe Key Lab of Critical Metals Minerals Supernormal Enrichment and Extraction, Ministry of Education, Zhengzhou 450001, ChinaPhosphogypsum is an industrial byproduct that is limited in its high-value application due to the presence of dyeing impurities (such as organic matter and carbon black). The flotation method has been verified to be effective in separating these dyeing impurities from gypsum. In this study, microemulsion was used as the collector method of dyeing impurities for their separation from gypsum. The results of flotation tests showed that the microemulsion collector exhibited excellent collection capability and selectivity under natural pH conditions (pH = 1.5). With a microemulsion collector consumption of 400 g/t, purified gypsum of 65.1% whiteness, 95.74% yield, and 97.01% recovery was obtained. The purified gypsum of 65.1% whiteness, 95.74% yield, 97.01 recovery obtained by a used microemulsion collector amount of 400 g/t was better than using the same dosage of kerosene collector. The dispersion behavior of the microemulsion collector was studied by low-temperature transmission electron microscopy. The microemulsion collector demonstrated superior dispersibility, as it forms nano-oil droplets with an average size of 176.83 nm in the pulp, resolving issues associated with poor dispersibility observed in traditional kerosene collectors. Additionally, the nano-oil droplets effectively adsorbed onto the surface of dyeing impurities through hydrogen bonding, enhancing their hydrophobicity. Therefore, the microemulsion collector holds great potential for application in flotation whitening processes involving phosphogypsum.https://www.mdpi.com/2297-8739/12/1/7microemulsionflotationphosphogypsumdyeing impurities |
| spellingShingle | Xiaosheng Yu Lijun Deng Changpan Shen Huiyong Li Jingchao Li Yijun Cao Guoli Zhou Guosheng Li Research on the Flotation Mechanism of Microemulsion Collector Enhanced Removal of Dyeing Impurities from Phosphogypsum Separations microemulsion flotation phosphogypsum dyeing impurities |
| title | Research on the Flotation Mechanism of Microemulsion Collector Enhanced Removal of Dyeing Impurities from Phosphogypsum |
| title_full | Research on the Flotation Mechanism of Microemulsion Collector Enhanced Removal of Dyeing Impurities from Phosphogypsum |
| title_fullStr | Research on the Flotation Mechanism of Microemulsion Collector Enhanced Removal of Dyeing Impurities from Phosphogypsum |
| title_full_unstemmed | Research on the Flotation Mechanism of Microemulsion Collector Enhanced Removal of Dyeing Impurities from Phosphogypsum |
| title_short | Research on the Flotation Mechanism of Microemulsion Collector Enhanced Removal of Dyeing Impurities from Phosphogypsum |
| title_sort | research on the flotation mechanism of microemulsion collector enhanced removal of dyeing impurities from phosphogypsum |
| topic | microemulsion flotation phosphogypsum dyeing impurities |
| url | https://www.mdpi.com/2297-8739/12/1/7 |
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