Flotation Decarbonization and Desulfurization of a High-Sulfur Bauxite in China
A high sulfur content is one of the challenges in the processing of refractory bauxites in China. The high carbon content of bauxite makes it more difficult to deal with. Desulfurization and decarbonization are the critical issues in the efficient exploitation of high-sulfur bauxite resources. An ex...
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| Format: | Article |
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MDPI AG
2023-07-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/8/1008 |
| _version_ | 1797583701361557504 |
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| author | Zhongping Zhu Xin Teng Yang Yang Hao Jiang Jun Luo |
| author_facet | Zhongping Zhu Xin Teng Yang Yang Hao Jiang Jun Luo |
| author_sort | Zhongping Zhu |
| collection | DOAJ |
| description | A high sulfur content is one of the challenges in the processing of refractory bauxites in China. The high carbon content of bauxite makes it more difficult to deal with. Desulfurization and decarbonization are the critical issues in the efficient exploitation of high-sulfur bauxite resources. An experimental study on the removal of sulfur and carbon in high-sulfur bauxite is proposed. The sulfur and carbon phases in high-sulfur bauxite were studied via X-ray diffraction and chemistry quantitative analyses. The results show that the sulfur phases in the high-sulfur bauxite mainly exist in the form of sulfide sulfur (pyrite), and the carbon phases in the sample mainly exist in the form of elementary substance carbon. The morphological features of pyrite in the high-sulfur bauxite were analyzed using a microscopic analysis and a scanning electron microscope (SEM). The pyrite exists in minerals in the forms of euhedral, semi-euhedral and other crystalline structures, with a particle size varying from several hundred microns to only a few microns. The raw ore, with a sulfur content of 4.78%, a sulfide sulfur content of 4.20%, a carbon content of 3.10% and an elementary substance carbon content of 2.46% goes through the “one roughing, one cleaning, two scavenging” process after a pre-decarburization, obtaining the total desulfurization recovery of 96.20% with a desulfurization tailing sulfur content of 0.38%, a carbon content of 0.27% and an alumina content of 71.85%, respectively. This work provides technical support for the efficient utilization of high-sulfur and high-carbon bauxite. |
| first_indexed | 2024-03-10T23:42:46Z |
| format | Article |
| id | doaj.art-7f05fc1a6ee54d18b7a18cad149dff74 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T23:42:46Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-7f05fc1a6ee54d18b7a18cad149dff742023-11-19T02:20:07ZengMDPI AGMinerals2075-163X2023-07-01138100810.3390/min13081008Flotation Decarbonization and Desulfurization of a High-Sulfur Bauxite in ChinaZhongping Zhu0Xin Teng1Yang Yang2Hao Jiang3Jun Luo4School 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, ChinaA high sulfur content is one of the challenges in the processing of refractory bauxites in China. The high carbon content of bauxite makes it more difficult to deal with. Desulfurization and decarbonization are the critical issues in the efficient exploitation of high-sulfur bauxite resources. An experimental study on the removal of sulfur and carbon in high-sulfur bauxite is proposed. The sulfur and carbon phases in high-sulfur bauxite were studied via X-ray diffraction and chemistry quantitative analyses. The results show that the sulfur phases in the high-sulfur bauxite mainly exist in the form of sulfide sulfur (pyrite), and the carbon phases in the sample mainly exist in the form of elementary substance carbon. The morphological features of pyrite in the high-sulfur bauxite were analyzed using a microscopic analysis and a scanning electron microscope (SEM). The pyrite exists in minerals in the forms of euhedral, semi-euhedral and other crystalline structures, with a particle size varying from several hundred microns to only a few microns. The raw ore, with a sulfur content of 4.78%, a sulfide sulfur content of 4.20%, a carbon content of 3.10% and an elementary substance carbon content of 2.46% goes through the “one roughing, one cleaning, two scavenging” process after a pre-decarburization, obtaining the total desulfurization recovery of 96.20% with a desulfurization tailing sulfur content of 0.38%, a carbon content of 0.27% and an alumina content of 71.85%, respectively. This work provides technical support for the efficient utilization of high-sulfur and high-carbon bauxite.https://www.mdpi.com/2075-163X/13/8/1008high-sulfur bauxitedecarbonizationdesulfurizationmicroscopic analysisflotation |
| spellingShingle | Zhongping Zhu Xin Teng Yang Yang Hao Jiang Jun Luo Flotation Decarbonization and Desulfurization of a High-Sulfur Bauxite in China Minerals high-sulfur bauxite decarbonization desulfurization microscopic analysis flotation |
| title | Flotation Decarbonization and Desulfurization of a High-Sulfur Bauxite in China |
| title_full | Flotation Decarbonization and Desulfurization of a High-Sulfur Bauxite in China |
| title_fullStr | Flotation Decarbonization and Desulfurization of a High-Sulfur Bauxite in China |
| title_full_unstemmed | Flotation Decarbonization and Desulfurization of a High-Sulfur Bauxite in China |
| title_short | Flotation Decarbonization and Desulfurization of a High-Sulfur Bauxite in China |
| title_sort | flotation decarbonization and desulfurization of a high sulfur bauxite in china |
| topic | high-sulfur bauxite decarbonization desulfurization microscopic analysis flotation |
| url | https://www.mdpi.com/2075-163X/13/8/1008 |
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