Study on carrier flotation of long flame coal
In order to improve the flotation effect of long flame coal and the utilization rate of low rank coal, the mechanism of long flame coal by carrier flotation was revealed. In this study, carrier flotation tests were conducted using long flame coal obtained from Shaanxi Yujialiang Coal Preparation Pla...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Coal Science and Technology
2023-04-01
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| Series: | Meitan kexue jishu |
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| Online Access: | http://www.mtkxjs.com.cn/article/doi/10.13199/j.cnki.cst.2021-0822 |
| _version_ | 1797448870271123456 |
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| author | Pengyue GENG |
| author_facet | Pengyue GENG |
| author_sort | Pengyue GENG |
| collection | DOAJ |
| description | In order to improve the flotation effect of long flame coal and the utilization rate of low rank coal, the mechanism of long flame coal by carrier flotation was revealed. In this study, carrier flotation tests were conducted using long flame coal obtained from Shaanxi Yujialiang Coal Preparation Plant as flotation feed and −1.3 g/cm3 anthracite from Shanghai Miao Coal Preparation Plant in Inner Mongolia as the carrier. The XRD and particle size analysis of long-flame coal revealed high fine content and ash content, with gangue minerals mainly composed of quartz and kaolin. The existence of fine coal slime and clay minerals led to the production of fine slime cap and mechanical entraining, resulting in a poor flotation effect. The effect of carrier size and proportion on the flotation effect of long flame coal was investigated. The results indicated that the cleaned coal yield decreased with the decreasing carrier particle size, and that the cleaned coal yield increased by 3.89% while the cleaned coal ash content decreased by 0.17% when 0.5~0.25 mm anthracite was used as the carrier. Furthermore, the carrier recovery rate of flotation cleaned coal reached 98.48%, with the carrier effectively recovered when the carrier proportion was 10∶1. Additionally, the influence of long flame coal slime size on carrier flotation was explored. The results revealed that 0.5~0.25 mm carrier could effectively improve the flotation effect of −0.045 mm long flame coal, with the cleaned coal yield increasing by 9.31% compared to the single flotation of −0.045 mm slime. In conclusion, carrier flotation mainly improves the flotation effect of fine slime. SEM, floc image analysis, and EDLVO theoretical calculation demonstrated that the −0.045 mm long-flame coal adhered to the carrier surface through the hydrophobic force and formed a large number of flocs, thus improving the flotation effect of long-flame coal. |
| first_indexed | 2024-03-09T14:16:40Z |
| format | Article |
| id | doaj.art-64b8c142c9da4230a58f1aafa059a005 |
| institution | Directory Open Access Journal |
| issn | 0253-2336 |
| language | zho |
| last_indexed | 2024-03-09T14:16:40Z |
| publishDate | 2023-04-01 |
| publisher | Editorial Department of Coal Science and Technology |
| record_format | Article |
| series | Meitan kexue jishu |
| spelling | doaj.art-64b8c142c9da4230a58f1aafa059a0052023-11-29T01:27:44ZzhoEditorial Department of Coal Science and TechnologyMeitan kexue jishu0253-23362023-04-0151422423010.13199/j.cnki.cst.2021-08222021-0822Study on carrier flotation of long flame coalPengyue GENG0Wuhan Design and Research Co., Ltd., China Coal Technology and Engineering Group, Wuhan 430000, ChinaIn order to improve the flotation effect of long flame coal and the utilization rate of low rank coal, the mechanism of long flame coal by carrier flotation was revealed. In this study, carrier flotation tests were conducted using long flame coal obtained from Shaanxi Yujialiang Coal Preparation Plant as flotation feed and −1.3 g/cm3 anthracite from Shanghai Miao Coal Preparation Plant in Inner Mongolia as the carrier. The XRD and particle size analysis of long-flame coal revealed high fine content and ash content, with gangue minerals mainly composed of quartz and kaolin. The existence of fine coal slime and clay minerals led to the production of fine slime cap and mechanical entraining, resulting in a poor flotation effect. The effect of carrier size and proportion on the flotation effect of long flame coal was investigated. The results indicated that the cleaned coal yield decreased with the decreasing carrier particle size, and that the cleaned coal yield increased by 3.89% while the cleaned coal ash content decreased by 0.17% when 0.5~0.25 mm anthracite was used as the carrier. Furthermore, the carrier recovery rate of flotation cleaned coal reached 98.48%, with the carrier effectively recovered when the carrier proportion was 10∶1. Additionally, the influence of long flame coal slime size on carrier flotation was explored. The results revealed that 0.5~0.25 mm carrier could effectively improve the flotation effect of −0.045 mm long flame coal, with the cleaned coal yield increasing by 9.31% compared to the single flotation of −0.045 mm slime. In conclusion, carrier flotation mainly improves the flotation effect of fine slime. SEM, floc image analysis, and EDLVO theoretical calculation demonstrated that the −0.045 mm long-flame coal adhered to the carrier surface through the hydrophobic force and formed a large number of flocs, thus improving the flotation effect of long-flame coal.http://www.mtkxjs.com.cn/article/doi/10.13199/j.cnki.cst.2021-0822long flame coalcarrier flotationfine coal slimeedlvo theory |
| spellingShingle | Pengyue GENG Study on carrier flotation of long flame coal Meitan kexue jishu long flame coal carrier flotation fine coal slime edlvo theory |
| title | Study on carrier flotation of long flame coal |
| title_full | Study on carrier flotation of long flame coal |
| title_fullStr | Study on carrier flotation of long flame coal |
| title_full_unstemmed | Study on carrier flotation of long flame coal |
| title_short | Study on carrier flotation of long flame coal |
| title_sort | study on carrier flotation of long flame coal |
| topic | long flame coal carrier flotation fine coal slime edlvo theory |
| url | http://www.mtkxjs.com.cn/article/doi/10.13199/j.cnki.cst.2021-0822 |
| work_keys_str_mv | AT pengyuegeng studyoncarrierflotationoflongflamecoal |