Improvement of concentrate quality in flotation of low-rank coal
Percentage of high-rank coal with low content of ash, moisture, and sulfur in total coal production output is low. Most of the produced coal has a low quality (lignite, bituminous coal: long-flame and fiery). Under increasing requirements for ecological cleanness of coal, the efficient use of coal p...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Saint-Petersburg Mining University
2024-02-01
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| Series: | Записки Горного института |
| Subjects: | |
| Online Access: | https://pmi.spmi.ru/pmi/article/view/15852?setLocale=en_US |
| _version_ | 1797279035691106304 |
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| author | Sergei A. Kondratev Tatyana A. Khamzina |
| author_facet | Sergei A. Kondratev Tatyana A. Khamzina |
| author_sort | Sergei A. Kondratev |
| collection | DOAJ |
| description | Percentage of high-rank coal with low content of ash, moisture, and sulfur in total coal production output is low. Most of the produced coal has a low quality (lignite, bituminous coal: long-flame and fiery). Under increasing requirements for ecological cleanness of coal, the efficient use of coal products is only possible after improvement of their processing properties. The authors discuss the enhancement of flotation efficiency of low-rank coal using the mechanism of physisorption of a collecting agent in particle – bubble attachment. It is explained why the yield of concentrate with low ash content increases as a result of combination of collectors having different physical properties. It is shown that the surface activity of a heteropolar agent relative to the gas – liquid interface and the adsorption density of the agent govern its collecting properties. Based on the recovery – surface activity relationship, the correlation is found between the collecting activity of a chemical compound and the structure of its molecules. The combination of the collectors with different surface activity enables adjusting collectability and selectivity of the blend. The physisorption mechanism of collectors can be a framework for developing recommendations on modification of concentrate yield and ash content, and on selection of optimized ratios of surface activities of miscible collectors relative to the gas – liquid interface. |
| first_indexed | 2024-03-07T16:17:36Z |
| format | Article |
| id | doaj.art-289e7257ffb343d7bce8b0156d4302c8 |
| institution | Directory Open Access Journal |
| issn | 2411-3336 2541-9404 |
| language | English |
| last_indexed | 2024-03-07T16:17:36Z |
| publishDate | 2024-02-01 |
| publisher | Saint-Petersburg Mining University |
| record_format | Article |
| series | Записки Горного института |
| spelling | doaj.art-289e7257ffb343d7bce8b0156d4302c82024-03-04T10:04:53ZengSaint-Petersburg Mining UniversityЗаписки Горного института2411-33362541-94042024-02-01265657715852Improvement of concentrate quality in flotation of low-rank coalSergei A. Kondratev0https://orcid.org/0000-0002-8245-2259Tatyana A. Khamzina1https://orcid.org/0000-0002-1281-9801Chinakal Institute of Mining, Siberian Branch, Russian Academy of SciencesChinakal Institute of Mining, Siberian Branch, Russian Academy of SciencesPercentage of high-rank coal with low content of ash, moisture, and sulfur in total coal production output is low. Most of the produced coal has a low quality (lignite, bituminous coal: long-flame and fiery). Under increasing requirements for ecological cleanness of coal, the efficient use of coal products is only possible after improvement of their processing properties. The authors discuss the enhancement of flotation efficiency of low-rank coal using the mechanism of physisorption of a collecting agent in particle – bubble attachment. It is explained why the yield of concentrate with low ash content increases as a result of combination of collectors having different physical properties. It is shown that the surface activity of a heteropolar agent relative to the gas – liquid interface and the adsorption density of the agent govern its collecting properties. Based on the recovery – surface activity relationship, the correlation is found between the collecting activity of a chemical compound and the structure of its molecules. The combination of the collectors with different surface activity enables adjusting collectability and selectivity of the blend. The physisorption mechanism of collectors can be a framework for developing recommendations on modification of concentrate yield and ash content, and on selection of optimized ratios of surface activities of miscible collectors relative to the gas – liquid interface.https://pmi.spmi.ru/pmi/article/view/15852?setLocale=en_USflotationcoalconcentrate yieldash contentagent surface activityextraction selectivity |
| spellingShingle | Sergei A. Kondratev Tatyana A. Khamzina Improvement of concentrate quality in flotation of low-rank coal Записки Горного института flotation coal concentrate yield ash content agent surface activity extraction selectivity |
| title | Improvement of concentrate quality in flotation of low-rank coal |
| title_full | Improvement of concentrate quality in flotation of low-rank coal |
| title_fullStr | Improvement of concentrate quality in flotation of low-rank coal |
| title_full_unstemmed | Improvement of concentrate quality in flotation of low-rank coal |
| title_short | Improvement of concentrate quality in flotation of low-rank coal |
| title_sort | improvement of concentrate quality in flotation of low rank coal |
| topic | flotation coal concentrate yield ash content agent surface activity extraction selectivity |
| url | https://pmi.spmi.ru/pmi/article/view/15852?setLocale=en_US |
| work_keys_str_mv | AT sergeiakondratev improvementofconcentratequalityinflotationoflowrankcoal AT tatyanaakhamzina improvementofconcentratequalityinflotationoflowrankcoal |