Coal and Gangue Active Identification Method Using Microwave Irradiation-Infrared Detection
In the process of the longwall top coal caving method, automatic distinction between coal and gangue at the working face is one of the most critical factors for the success of the operation. An active coal and gangue identification method using microwave irradiation combined with infrared detection...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/12/8/951 |
| _version_ | 1797408694476996608 |
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| author | Chuang Liu Hani S. Mitri Huamin Li |
| author_facet | Chuang Liu Hani S. Mitri Huamin Li |
| author_sort | Chuang Liu |
| collection | DOAJ |
| description | In the process of the longwall top coal caving method, automatic distinction between coal and gangue at the working face is one of the most critical factors for the success of the operation. An active coal and gangue identification method using microwave irradiation combined with infrared detection is proposed in this paper. Coal and gangue are irradiated with microwave to actively enhance the external differences between them, and then the quantitative data of the difference are quickly collected by a noncontact infrared thermal imager, to perform identification of coal and gangue. Using theoretical analysis and laboratory experiments, the physical and chemical properties of coal and gangue are analyzed in order to reveal the thermal sensitivity of coal and gangue to microwave irradiation. The influences of the coal and gangue particle size, microwave irradiation time and microwave frequency on the thermal sensitivity to microwave irradiation are investigated. The experimental results show that the average temperature rise in coal is approximately 1.5 times that in gangue material under the same microwave irradiation conditions. This supports the feasibility of this identification method, and provides theoretical and experimental bases for achieving rapid and accurate identification of coal and gangue in top coal caving operations. |
| first_indexed | 2024-03-09T04:03:16Z |
| format | Article |
| id | doaj.art-21f04a84954d456ab56e7afcb170af51 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T04:03:16Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-21f04a84954d456ab56e7afcb170af512023-12-03T14:10:04ZengMDPI AGMinerals2075-163X2022-07-0112895110.3390/min12080951Coal and Gangue Active Identification Method Using Microwave Irradiation-Infrared DetectionChuang Liu0Hani S. Mitri1Huamin Li2School of Resource and Safety Engineering, Henan University of Engineering, Zhengzhou 451191, ChinaDepartment of Mining and Materials Engineering, McGill University, Montreal, QC H3A 0E8, CanadaSchool of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaIn the process of the longwall top coal caving method, automatic distinction between coal and gangue at the working face is one of the most critical factors for the success of the operation. An active coal and gangue identification method using microwave irradiation combined with infrared detection is proposed in this paper. Coal and gangue are irradiated with microwave to actively enhance the external differences between them, and then the quantitative data of the difference are quickly collected by a noncontact infrared thermal imager, to perform identification of coal and gangue. Using theoretical analysis and laboratory experiments, the physical and chemical properties of coal and gangue are analyzed in order to reveal the thermal sensitivity of coal and gangue to microwave irradiation. The influences of the coal and gangue particle size, microwave irradiation time and microwave frequency on the thermal sensitivity to microwave irradiation are investigated. The experimental results show that the average temperature rise in coal is approximately 1.5 times that in gangue material under the same microwave irradiation conditions. This supports the feasibility of this identification method, and provides theoretical and experimental bases for achieving rapid and accurate identification of coal and gangue in top coal caving operations.https://www.mdpi.com/2075-163X/12/8/951longwall top coal cavingcoal and gangue identificationmicrowave irradiationinfrared detectionactive method |
| spellingShingle | Chuang Liu Hani S. Mitri Huamin Li Coal and Gangue Active Identification Method Using Microwave Irradiation-Infrared Detection Minerals longwall top coal caving coal and gangue identification microwave irradiation infrared detection active method |
| title | Coal and Gangue Active Identification Method Using Microwave Irradiation-Infrared Detection |
| title_full | Coal and Gangue Active Identification Method Using Microwave Irradiation-Infrared Detection |
| title_fullStr | Coal and Gangue Active Identification Method Using Microwave Irradiation-Infrared Detection |
| title_full_unstemmed | Coal and Gangue Active Identification Method Using Microwave Irradiation-Infrared Detection |
| title_short | Coal and Gangue Active Identification Method Using Microwave Irradiation-Infrared Detection |
| title_sort | coal and gangue active identification method using microwave irradiation infrared detection |
| topic | longwall top coal caving coal and gangue identification microwave irradiation infrared detection active method |
| url | https://www.mdpi.com/2075-163X/12/8/951 |
| work_keys_str_mv | AT chuangliu coalandgangueactiveidentificationmethodusingmicrowaveirradiationinfrareddetection AT hanismitri coalandgangueactiveidentificationmethodusingmicrowaveirradiationinfrareddetection AT huaminli coalandgangueactiveidentificationmethodusingmicrowaveirradiationinfrareddetection |