About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials 2022
|
Presentation Title |
Degradation of Structure and Properties of Coke in Blast Furnace: Effect of High Temperature Heat Treatment |
Author(s) |
Jingbo Chen, Shengfu Zhang, Yan Guo |
On-Site Speaker (Planned) |
Jingbo Chen |
Abstract Scope |
To clarify the relationship between mineral phases transformation, carbon matrix structure and coke properties of metallurgical coke during high temperature in blast furnace, metallurgical coke made from different coking coals were subjected to annealing under N2 at 1100 ℃-1600 ℃ (corresponding from the lumpy zone to the dropping zone). A new method for quantitative analysis of mineral phases combined with X-Ray diffraction was used to describe the transformation of minerals phases. RT-Raman spectra, Optical microscope and Universal material testing machine were used to characterize the change of carbon matrix structure and coke properties. It was found that annealing caused the mineral transformation in coke, including the decomposition of kaoline and mullite, the formation of moissanite, cementite and gehlenite which result in the increase of coke porosity. Then, annealing can affect the carbon structure (crystalline structure and carbon skeleton), including promoting graphitization of carbon structure and cleavaging of large aromatic ring. |
Proceedings Inclusion? |
Planned: |