|
| The feasibility of using low-varied lignite from Shenmu in coal blending for coking |
|
Received:December 19, 2024
Revised:January 25, 2025
Accepted:February 06, 2025
Published Online:April 30, 2026
|
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.1005-7854.2026.02.013 |
| KeyWord:low-metamorphic coal;blending coal for coking;petrograph;bond index;crucible ash |
|
| 1.School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710000, China;2.Shenmu Sanjiang Coal Chemical Industry Co., Ltd., Yulin 719000, Shaanxi, China |
| Hits: 60 |
| Download times: 3 |
| Abstract: |
| In order to explore the potential application of Shenmu low-vitrinite coal in coal blending for coke production, the coal quality characteristics, petrographic features, and pyrolysis characteristics of Shenmu low-vitrinite coal were determined. Coals with a coke ash characteristic of≥3, a matrix vitrinite content of>10.5%, and a vitrinite reflectance of≥0.52% were classified as low-viscous coals, while the others were classified as non-viscous coals. Compared with non-viscous coals, the coal quality characteristics of low-viscous coals were more similar to those of lignite. By measuring the cohesiveness, PRI, and PSR of different proportions (SR) of low-viscous and non-viscous coals replacing bituminous coal, the role of each microscopic component in the pyrolysis process of Shenmu low-vitrinite coal was further explored. The results showed that when SR<CR (the crossing proportion when the cohesiveness of low-viscous and non-viscous blended coal is most similar), the cohesiveness of low-vitrinite blended coal was mainly influenced by the matrix vitrinite, with the cohesiveness of low-viscous blended coal being higher and the PRI of the crucible coke being lower and the PSR being higher. When SR>CR, the cohesiveness of low-vitrinite blended coal was mainly influenced by the total amount of vitrinite, with the cohesiveness, PRI, and PSR of the blended coal and crucible coke being similar. Especially when SR≤6%, the cohesiveness of 2# blended coal was the best (G value≥76), which was suitable for metallurgical coke production. The research results can provide theoretical basis and technical support for the application of Shenmu low-vitrinite coal in the metallurgical coke field. |
| Close |
|
|
|