Combustion Behavior of Coated Cokes with Fine Fe3O4 and CaO

Le résumé fourni par la source

In order to improve particles of cokes in the sintered layer, we investigated the combustion behavior of coated cokes with fine Fe3O4 and CaO at 1173 K, 1273 K and 1473 K of experimental temperature. The reaction rates of the coated cokes were calculated by weight loss measurements using the thermo-balance electric combustion furnace. It was found that the reaction rates of the coated cokes with fine iron oxide (Fe3O4 or Fe2O3) and CaO were higher than rates of any other coated samples at almost conditions. Temperature dependence and generated CO2 gas volume of samples during combustion were measured at 1173 K and 1273 K. The temperature of coated cokes with fine iron oxide (Fe3O4 or Fe2O3) and CaO were found to be rising over 1600 K in a few minutes at 1273 K of experimental temperature. Moreover, the generated CO2 gas volume of samples were also drastically rising by the catalytic influence of CaO. The cross-sectional SEM images of coated cokes with fine iron oxide (Fe3O4 or Fe2O3) and CaO were observed. It was found that the coated layer was partially melted and surface area of coke was appeared.

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