Highly reactive coke made from Low-rank Coal: Relationship between thermal properties and multilevel structure. (1st April 2023)

• Record Type: Journal Article
• Authors: Zhang, Xin; Zhang, Jun; Guo, Rui; Xiao, Qiang; Feng, Yawei; Cheng, Huan
• Is Part Of: Fuel. Volume 337(2023)
• Publication Date: 2023-04-01
• Subjects: Low rank coal -- Coke -- Reactivity -- Strength after reactivity -- Pore structure; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.127186
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: A type of coke containing a high percentage of low-rank coal was prepared. The coke prepared from low-rank coal had high reactivity and high strength after solution loss reaction. The multilevel structure of coke prepared from low-rank coal is tested, and the reasons for its special thermal properties are analyzed. Abstract: Utilization of high-reactivity coke is an effective countermeasure to achieve low carbon blast furnace. We proposed a method for preparing high-reactivity metallurgical coke using low-rank coal. Low-rank coal and its semi-coke were mixed with a certain proportion of caking bituminous coal and then converted to briquetting coal under high pressure. The coke prepared by high-temperature carbonization had a high compressive strength. The reaction rate and strength after the reaction of the coke with iso-solution loss were examined at different temperatures. The matrix reaction characteristics, microcrystalline structure, optical structure, apparent porosity, micron-sized pore distribution, nitrogen and carbon dioxide adsorption characteristics, and mineral composition of the coke were also investigated. Compared with the traditional coke, the coke prepared from low-rank coal not only had a high reaction rate at all temperatures but also a high strength after iso-solution loss.