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- Title
Energy Conservation for Granular Coal Injection into a Blast Furnace.
- Authors
Guo, Hongwei; Su, Buxin; Zhang, Jianliang; Shao, Jiugang; Zuo, Haibin; Ren, Shan
- Abstract
Due to the lack of knowledge regarding the combustion of granular coal injected into a blast furnace, injection characteristics of granular coal were first studied through proximate analysis, element analysis, and research of explosivity, ignition point, meltability of ash, grindability, calorific value, etc. Using a sampling device in the raceway combined with petrographic analysis, during the combustion process of granular coal with high crystal water and volatile in raceway, cracks and bursts were found, leading to a reduction of particle size. Based on a model of mass control and dynamic theory of particle combustion, the transition dynamic model for cracking in combustion of granular coal was found, and the critical value of cracking ratio (Ω) for granular coal combustion in the raceway was calculated. Finally, the utilization ratio and energy efficiency of granular coal used in the blast furnace were discussed, offering theoretical foundation and technical support for intensifying granular coal combustion and promoting granular coal injection.
- Subjects
ENERGY conservation; BLAST furnace combustion; COAL combustion; BLAST furnaces; PULVERIZED coal; FUEL systems
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2012, Vol 64, Issue 8, p1002
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-012-0390-5