Journal
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
Volume 141, Issue 11, Pages -Publisher
ASME
DOI: 10.1115/1.4044365
Keywords
reactive porous media; gaseous-fuel segregation; fuel segregation; hot air; oxygen enrichment
Categories
Funding
- National Key Research and Development Program of China [2017YFB0603501]
- National Science Foundation of China [51536007]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51721004]
- China Scholarship Council Fellowship [201706280255]
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Iron ore sintering is a typical application of reactive porous media combustion (RPMC) which has been widely reported. In this work, a computational model of RPMC is developed, in which heat and mass transfer, as well as main chemical subprocesses in reactive porous media are incorporated. A gaseous-fuel injection method is examined to enable better heat pattern. However, the imbalance of heat distribution in the flow direction caused by internally recirculating heat released via a solid matrix is still problematic on energy efficiency. Through computations, it is observed that the heat pattern and melting quantity index (MQI) are sensitive on gaseous-fuel concentration, providing a possibility of improving the heat distribution imbalance. Numerical results are presented to demonstrate the benefits of fuel segregation. Finally, more reasonable heat pattern is observed by combinations of gaseous-fuel segregation with hot air and oxygen enrichment. The dynamics of gaseous/solid-fuel combustion zones caused by the hot air and oxygen enrichment would contribute to an expansion of melting zone near the inlet, producing a more reasonable and uniform heat distribution in a sintering bed.
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